GoKawiil御神渡り · Lake Suwa
The god has not crossed Lake Suwa in eight winters
When Lake Suwa freezes over, the ice can buckle along a seam and throw up a ridge that runs from one shore to the other. 八剱神社 reads that ridge as the track of 建御名方神 crossing the lake to reach 八坂刀売神, and has recorded its appearance since 1443 — not as a measurement, but as a divination. The direction of the cracks is read for the coming year's harvest, and the result is still filed with the Japan Meteorological Agency each February. That is why a 583-year record of one lake's ice exists at all. Nobody set out to keep one.
8 winters since the last certified crossing, in February 2018. That is longer than any absence that has ever ended in the era the record counts season by season — the previous longest ran 6 winters, from 1992 to 1997 . 八剱神社 puts a run of this length level with one from 1507 to 1514, though that earlier run was recorded under a different definition of the crossing. As of the shrine’s declaration on 2026-02-04 .
By the shrine's own count, 明けの海 has been declared 80 times since 1443. Twenty-seven of them fall since 1989. That count spans the 1742 change in what 御神渡り means, which biases the early era toward fewer failures — so it understates rather than overstates. Counting only since the definition settled: 5 failures in the 50 years to 1950, against 25 in the 34 since 1989. Tally: 八剱神社, via 諏訪観光協会 . Ice record: NSIDC G01377 (DOI 10.7265/N5W66HP8), extended from 気象庁 and 諏訪観光協会 reports. Source history after Ishiguro (2001).
1444–1682 當社神幸記 1683–1871 御渡帳 · 注進録 1893–1923 1924–2026 1872–1892 記録中断 — suspended by decree 1742 御神渡り = ridge 1450 1500 1550 1600 1650 1700 1750 1800 1850 1900 1950 2000 Every winter from 1444 to 2026 . A full bar is a winter the lake froze over; a stub is one it never did; a dashed outline is a winter the sources disagree or fall silent. The blue strip beneath is the shrine’s own judgment — filled where a crossing was certified, hollow where it was not — and it begins only in 1990, because that is where the record becomes per-season. 9 crossings appear in it.
Read the record as a table ( 583 winters) Every winter on Lake Suwa by observation year, with whether the lake froze over, whether 八剱神社 certified a crossing, and the source of each. Winter Record Ice Crossing Ice-on Source 1443-44 stage 1 · crack froze over not recorded 1444-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1444-45 stage 1 · crack froze over not recorded 1444-12-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1445-46 stage 1 · crack froze over not recorded 1445-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1446-47 stage 1 · crack froze over not recorded 1447-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1447-48 stage 1 · crack froze over not recorded 1447-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1448-49 stage 1 · crack froze over not recorded 1449-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1449-50 stage 1 · crack froze over not recorded 1450-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1450-51 stage 1 · crack froze over not recorded 1451-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1451-52 stage 1 · crack froze over not recorded 1452-01-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1452-53 stage 1 · crack froze over not recorded 1452-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1453-54 stage 1 · crack froze over not recorded 1454-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1454-55 stage 1 · crack froze over not recorded 1455-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1455-56 stage 1 · crack froze over not recorded 1455-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1456-57 stage 1 · crack froze over not recorded 1457-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1457-58 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1458-59 stage 1 · crack froze over not recorded 1459-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1459-60 stage 1 · crack froze over not recorded 1459-12-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1460-61 stage 1 · crack froze over not recorded 1461-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1461-62 stage 1 · crack froze over not recorded 1462-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1462-63 stage 1 · crack froze over not recorded 1462-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1463-64 stage 1 · crack froze over not recorded 1464-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1464-65 stage 1 · crack froze over not recorded 1465-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1465-66 stage 1 · crack froze over not recorded 1465-12-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1466-67 stage 1 · crack froze over not recorded 1467-01-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1467-68 stage 1 · crack froze over not recorded 1468-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1468-69 stage 1 · crack froze over not recorded 1469-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1469-70 stage 1 · crack froze over not recorded 1470-02-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1470-71 stage 1 · crack froze over not recorded 1470-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1471-72 stage 1 · crack froze over not recorded 1471-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1472-73 stage 1 · crack froze over not recorded 1472-12-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1473-74 stage 1 · crack froze over not recorded 1474-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1474-75 stage 1 · crack froze over not recorded 1475-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1475-76 stage 1 · crack froze over not recorded 1475-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1476-77 stage 1 · crack froze over not recorded 1477-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1477-78 stage 1 · crack froze over not recorded 1478-01-17 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1478-79 stage 1 · crack froze over not recorded 1479-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1479-80 stage 1 · crack froze over not recorded 1480-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1480-81 stage 1 · crack froze over not recorded 1481-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1481-82 stage 1 · crack froze over not recorded 1482-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1482-83 stage 1 · crack froze over not recorded 1483-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1483-84 stage 1 · crack froze over not recorded 1483-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1484-85 stage 1 · crack froze over not recorded 1485-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1485-86 stage 1 · crack froze over not recorded 1486-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1486-87 stage 1 · crack froze over not recorded 1487-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1487-88 stage 1 · crack froze over not recorded 1488-02-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1488-89 stage 1 · crack froze over not recorded 1489-01-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1489-90 stage 1 · crack froze over not recorded 1489-12-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1490-91 stage 1 · crack froze over not recorded 1491-02-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1491-92 stage 1 · crack froze over not recorded 1492-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1492-93 stage 1 · crack froze over not recorded 1493-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1493-94 stage 1 · crack froze over not recorded 1494-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1494-95 stage 1 · crack froze over not recorded 1495-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1495-96 stage 1 · crack froze over not recorded 1496-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1496-97 stage 1 · crack froze over not recorded 1497-01-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1497-98 stage 1 · crack froze over not recorded 1497-12-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1498-99 stage 1 · crack froze over not recorded 1499-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1499-00 stage 1 · crack froze over not recorded 1499-12-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1500-01 stage 1 · crack froze over not recorded 1500-12-27 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1501-02 stage 1 · crack froze over not recorded 1502-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1502-03 stage 1 · crack froze over not recorded 1503-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1503-04 stage 1 · crack froze over not recorded 1503-12-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1504-05 stage 1 · crack froze over not recorded 1504-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1505-06 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1506-07 stage 1 · crack froze over not recorded 1506-12-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1507-08 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1508-09 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1509-10 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1510-11 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1511-12 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1512-13 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1513-14 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1514-15 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1515-16 stage 1 · crack froze over not recorded 1516-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1516-17 stage 1 · crack froze over not recorded 1517-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1517-18 stage 1 · crack froze over not recorded 1518-02-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1518-19 stage 1 · crack froze over not recorded 1518-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1519-20 stage 1 · crack froze over not recorded 1520-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1520-21 stage 1 · crack froze over not recorded 1521-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1521-22 stage 1 · crack froze over not recorded 1522-01-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1522-23 stage 1 · crack froze over not recorded 1523-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1523-24 stage 1 · crack froze over not recorded 1524-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1524-25 stage 1 · crack froze over not recorded 1525-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1525-26 stage 1 · crack froze over not recorded 1525-12-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1526-27 stage 1 · crack froze over not recorded 1527-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1527-28 stage 1 · crack froze over not recorded 1528-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1528-29 stage 1 · crack froze over not recorded 1528-12-27 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1529-30 stage 1 · crack froze over not recorded 1530-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1530-31 stage 1 · crack froze over not recorded 1531-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1531-32 stage 1 · crack froze over not recorded 1532-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1532-33 stage 1 · crack froze over not recorded 1533-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1533-34 stage 1 · crack froze over not recorded 1533-12-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1534-35 stage 1 · crack froze over not recorded 1535-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1535-36 stage 1 · crack froze over not recorded 1535-12-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1536-37 stage 1 · crack froze over not recorded 1537-02-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1537-38 stage 1 · crack froze over not recorded 1538-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1538-39 stage 1 · crack froze over not recorded 1538-12-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1539-40 stage 1 · crack froze over not recorded 1540-02-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1540-41 stage 1 · crack froze over not recorded 1540-12-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1541-42 stage 1 · crack froze over not recorded 1542-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1542-43 stage 1 · crack froze over not recorded 1543-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1543-44 stage 1 · crack froze over not recorded 1544-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1544-45 stage 1 · crack froze over not recorded 1545-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1545-46 stage 1 · crack froze over not recorded 1546-02-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1546-47 stage 1 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1547-48 stage 1 · crack froze over not recorded 1548-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1548-49 stage 1 · crack froze over not recorded 1549-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1549-50 stage 1 · crack froze over not recorded 1550-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1550-51 stage 1 · crack froze over not recorded 1551-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1551-52 stage 1 · crack froze over not recorded 1552-02-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1552-53 stage 1 · crack froze over not recorded 1552-12-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1553-54 stage 1 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1554-55 stage 1 · crack froze over not recorded 1555-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1555-56 stage 1 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1556-57 stage 1 · crack froze over not recorded 1557-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1557-58 stage 1 · crack froze over not recorded 1558-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1558-59 stage 1 · crack froze over not recorded 1558-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1559-60 stage 1 · crack froze over not recorded 1560-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1560-61 stage 1 · crack froze over not recorded 1561-02-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1561-62 stage 1 · crack froze over not recorded 1562-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1562-63 stage 1 · crack froze over not recorded 1563-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1563-64 stage 1 · crack froze over not recorded 1564-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1564-65 stage 1 · crack froze over not recorded 1565-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1565-66 stage 1 · crack froze over not recorded 1565-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1566-67 stage 1 · crack froze over not recorded 1567-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1567-68 stage 1 · crack froze over not recorded 1568-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1568-69 stage 1 · crack froze over not recorded 1568-12-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1569-70 stage 1 · crack froze over not recorded 1569-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1570-71 stage 1 · crack froze over not recorded 1571-01-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1571-72 stage 1 · crack froze over not recorded 1571-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1572-73 stage 1 · crack froze over not recorded 1573-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1573-74 stage 1 · crack froze over not recorded 1573-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1574-75 stage 1 · crack froze over not recorded 1575-02-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1575-76 stage 1 · crack froze over not recorded 1576-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1576-77 stage 1 · crack froze over not recorded 1577-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1577-78 stage 1 · crack froze over not recorded 1578-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1578-79 stage 1 · crack froze over not recorded 1579-01-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1579-80 stage 1 · crack froze over not recorded 1580-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1580-81 stage 1 · crack froze over not recorded 1581-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1581-82 stage 1 · crack froze over not recorded 1582-01-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1582-83 stage 1 · crack froze over not recorded 1582-12-17 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1583-84 stage 1 · crack froze over not recorded 1583-12-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1584-85 stage 1 · crack froze over not recorded 1584-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1585-86 stage 1 · crack froze over not recorded 1586-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1586-87 stage 1 · crack froze over not recorded 1586-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1587-88 stage 1 · crack froze over not recorded 1587-12-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1588-89 stage 1 · crack froze over not recorded 1589-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1589-90 stage 1 · crack froze over not recorded 1589-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1590-91 stage 1 · crack froze over not recorded 1591-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1591-92 stage 1 · crack froze over not recorded 1592-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1592-93 stage 1 · crack froze over not recorded 1592-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1593-94 stage 1 · crack froze over not recorded 1594-03-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1594-95 stage 1 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1595-96 stage 1 · crack froze over not recorded 1596-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1596-97 stage 1 · crack froze over not recorded 1597-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1597-98 stage 1 · crack froze over not recorded 1597-12-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1598-99 stage 1 · crack froze over not recorded 1598-12-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1599-00 stage 1 · crack froze over not recorded 1600-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1600-01 stage 1 · crack froze over not recorded 1600-12-19 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1601-02 stage 1 · crack froze over not recorded 1602-01-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1602-03 stage 1 · crack froze over not recorded 1603-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1603-04 stage 1 · crack froze over not recorded 1603-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1604-05 stage 1 · crack froze over not recorded 1605-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1605-06 stage 1 · crack froze over not recorded 1605-12-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1606-07 stage 1 · crack froze over not recorded 1606-12-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1607-08 stage 1 · crack froze over not recorded 1608-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1608-09 stage 1 · crack froze over not recorded 1609-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1609-10 stage 1 · crack froze over not recorded 1609-12-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1610-11 stage 1 · crack froze over not recorded 1610-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1611-12 stage 1 · crack froze over not recorded 1611-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1612-13 stage 1 · crack froze over not recorded 1613-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1613-14 stage 1 · crack froze over not recorded 1614-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1614-15 stage 1 · crack froze over not recorded 1614-12-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1615-16 stage 1 · crack froze over not recorded 1616-01-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1616-17 stage 1 · crack froze over not recorded 1616-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1617-18 stage 1 · crack froze over not recorded 1618-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1618-19 stage 1 · crack froze over not recorded 1619-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1619-20 stage 1 · crack froze over not recorded 1620-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1620-21 stage 1 · crack froze over not recorded 1620-12-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1621-22 stage 1 · crack froze over not recorded 1622-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1622-23 stage 1 · crack froze over not recorded 1623-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1623-24 stage 1 · crack froze over not recorded 1624-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1624-25 stage 1 · crack froze over not recorded 1625-01-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1625-26 stage 1 · crack froze over not recorded 1626-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1626-27 stage 1 · crack froze over not recorded 1627-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1627-28 stage 1 · crack froze over not recorded 1628-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1628-29 stage 1 · crack froze over not recorded 1628-12-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1629-30 stage 1 · crack froze over not recorded 1630-01-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1630-31 stage 1 · crack froze over not recorded 1630-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1631-32 stage 1 · crack froze over not recorded 1632-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1632-33 stage 1 · crack froze over not recorded 1633-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1633-34 stage 1 · crack froze over not recorded 1634-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1634-35 stage 1 · crack froze over not recorded 1634-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1635-36 stage 1 · crack froze over not recorded 1636-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1636-37 stage 1 · crack froze over not recorded 1637-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1637-38 stage 1 · crack froze over not recorded 1637-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1638-39 stage 1 · crack froze over not recorded 1639-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1639-40 stage 1 · crack froze over not recorded 1640-01-19 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1640-41 stage 1 · crack froze over not recorded 1641-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1641-42 stage 1 · crack froze over not recorded 1641-12-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1642-43 stage 1 · crack froze over not recorded 1643-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1643-44 stage 1 · crack froze over not recorded 1644-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1644-45 stage 1 · crack froze over not recorded 1645-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1645-46 stage 1 · crack froze over not recorded 1646-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1646-47 stage 1 · crack froze over not recorded 1647-02-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1647-48 stage 1 · crack froze over not recorded 1648-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1648-49 stage 1 · crack froze over not recorded 1648-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1649-50 stage 1 · crack froze over not recorded 1650-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1650-51 stage 1 · crack froze over not recorded 1651-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1651-52 stage 1 · crack froze over not recorded 1652-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1652-53 stage 1 · crack froze over not recorded 1653-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1653-54 stage 1 · crack froze over not recorded 1654-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1654-55 stage 1 · crack froze over not recorded 1655-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1655-56 stage 1 · crack froze over not recorded 1656-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1656-57 stage 1 · crack froze over not recorded 1657-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1657-58 stage 1 · crack froze over not recorded 1658-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1658-59 stage 1 · crack froze over not recorded 1658-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1659-60 stage 1 · crack froze over not recorded 1660-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1660-61 stage 1 · crack froze over not recorded 1661-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1661-62 stage 1 · crack froze over not recorded 1662-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1662-63 stage 1 · crack froze over not recorded 1663-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1663-64 stage 1 · crack froze over not recorded 1664-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1664-65 stage 1 · crack froze over not recorded 1664-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1665-66 stage 1 · crack froze over not recorded 1665-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1666-67 stage 1 · crack froze over not recorded 1667-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1667-68 stage 1 · crack froze over not recorded 1668-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1668-69 stage 1 · crack froze over not recorded 1668-12-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1669-70 stage 1 · crack froze over not recorded 1670-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1670-71 stage 1 · crack froze over not recorded 1671-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1671-72 stage 1 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1672-73 stage 1 · crack froze over not recorded 1672-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1673-74 stage 1 · crack froze over not recorded 1674-01-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1674-75 stage 1 · crack froze over not recorded 1675-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1675-76 stage 1 · crack froze over not recorded 1676-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1676-77 stage 1 · crack froze over not recorded 1677-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1677-78 stage 1 · crack froze over not recorded 1678-02-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1678-79 stage 1 · crack froze over not recorded 1679-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1679-80 stage 1 · crack froze over not recorded 1679-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1680-81 stage 1 · crack froze over not recorded 1680-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1681-82 stage 1 · crack froze over not recorded 1682-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1682-83 stage 2 · crack uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1683-84 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1684-85 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1685-86 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1686-87 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1687-88 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1688-89 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1689-90 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1690-91 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1691-92 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1692-93 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1693-94 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1694-95 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1695-96 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1696-97 stage 2 · crack froze over not recorded 1696-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1697-98 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1698-99 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1699-00 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1700-01 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1701-02 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1702-03 stage 2 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1703-04 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1704-05 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1705-06 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1706-07 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1707-08 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1708-09 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1709-10 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1710-11 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1711-12 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1712-13 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1713-14 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1714-15 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1715-16 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1716-17 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1717-18 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1718-19 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1719-20 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1720-21 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1721-22 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1722-23 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1723-24 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1724-25 stage 2 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1725-26 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1726-27 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1727-28 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1728-29 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1729-30 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1730-31 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1731-32 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1732-33 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1733-34 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1734-35 stage 2 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1735-36 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1736-37 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1737-38 stage 2 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1738-39 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1739-40 stage 2 · crack never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1740-41 stage 2 · crack froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1741-42 stage 2 · ridge froze over not recorded 1742-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1742-43 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1743-44 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1744-45 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1745-46 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1746-47 stage 2 · ridge froze over not recorded 1747-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1747-48 stage 2 · ridge froze over not recorded 1748-01-27 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1748-49 stage 2 · ridge froze over not recorded 1749-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1749-50 stage 2 · ridge froze over not recorded 1750-01-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1750-51 stage 2 · ridge froze over not recorded 1751-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1751-52 stage 2 · ridge froze over not recorded 1751-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1752-53 stage 2 · ridge froze over not recorded 1753-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1753-54 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1754-55 stage 2 · ridge froze over not recorded 1755-02-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1755-56 stage 2 · ridge froze over not recorded 1756-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1756-57 stage 2 · ridge froze over not recorded 1757-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1757-58 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1758-59 stage 2 · ridge froze over not recorded 1759-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1759-60 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1760-61 stage 2 · ridge froze over not recorded 1760-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1761-62 stage 2 · ridge froze over not recorded 1761-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1762-63 stage 2 · ridge froze over not recorded 1763-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1763-64 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1764-65 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1765-66 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1766-67 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1767-68 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1768-69 stage 2 · ridge froze over not recorded 1769-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1769-70 stage 2 · ridge froze over not recorded 1770-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1770-71 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1771-72 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1772-73 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1773-74 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1774-75 stage 2 · ridge froze over not recorded 1774-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1775-76 stage 2 · ridge froze over not recorded 1776-01-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1776-77 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1777-78 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1778-79 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1779-80 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1780-81 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1781-82 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1782-83 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1783-84 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1784-85 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1785-86 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1786-87 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1787-88 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1788-89 stage 2 · ridge froze over not recorded 1789-01-01 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1789-90 stage 2 · ridge froze over not recorded 1790-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1790-91 stage 2 · ridge froze over not recorded 1790-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1791-92 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1792-93 stage 2 · ridge froze over not recorded 1792-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1793-94 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1794-95 stage 2 · ridge froze over not recorded 1795-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1795-96 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1796-97 stage 2 · ridge froze over not recorded 1797-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1797-98 stage 2 · ridge froze over not recorded 1798-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1798-99 stage 2 · ridge froze over not recorded 1799-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1799-00 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1800-01 stage 2 · ridge froze over not recorded 1801-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1801-02 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1802-03 stage 2 · ridge uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1803-04 stage 2 · ridge froze over not recorded 1804-01-17 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1804-05 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1805-06 stage 2 · ridge froze over not recorded 1806-02-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1806-07 stage 2 · ridge froze over not recorded 1807-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1807-08 stage 2 · ridge froze over not recorded 1808-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1808-09 stage 2 · ridge froze over not recorded 1809-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1809-10 stage 2 · ridge froze over not recorded 1809-12-27 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1810-11 stage 2 · ridge froze over not recorded 1811-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1811-12 stage 2 · ridge froze over not recorded 1812-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1812-13 stage 2 · ridge froze over not recorded 1812-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1813-14 stage 2 · ridge froze over not recorded 1814-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1814-15 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1815-16 stage 2 · ridge froze over not recorded 1815-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1816-17 stage 2 · ridge froze over not recorded 1817-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1817-18 stage 2 · ridge froze over not recorded 1818-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1818-19 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1819-20 stage 2 · ridge froze over not recorded 1820-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1820-21 stage 2 · ridge froze over not recorded 1821-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1821-22 stage 2 · ridge froze over not recorded 1822-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1822-23 stage 2 · ridge froze over not recorded 1823-01-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1823-24 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1824-25 stage 2 · ridge uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1825-26 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1826-27 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1827-28 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1828-29 stage 2 · ridge froze over not recorded 1829-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1829-30 stage 2 · ridge froze over not recorded 1830-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1830-31 stage 2 · ridge froze over not recorded 1831-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1831-32 stage 2 · ridge froze over not recorded 1832-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1832-33 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1833-34 stage 2 · ridge froze over not recorded 1834-02-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1834-35 stage 2 · ridge froze over not recorded 1835-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1835-36 stage 2 · ridge froze over not recorded 1836-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1836-37 stage 2 · ridge froze over not recorded 1837-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1837-38 stage 2 · ridge froze over not recorded 1838-02-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1838-39 stage 2 · ridge froze over not recorded 1839-01-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1839-40 stage 2 · ridge froze over not recorded 1840-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1840-41 stage 2 · ridge froze over not recorded 1841-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1841-42 stage 2 · ridge froze over not recorded 1842-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1842-43 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1843-44 stage 2 · ridge froze over not recorded 1844-01-17 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1844-45 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1845-46 stage 2 · ridge froze over not recorded 1845-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1846-47 stage 2 · ridge froze over not recorded 1847-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1847-48 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1848-49 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1849-50 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1850-51 stage 2 · ridge froze over not recorded 1851-02-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1851-52 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1852-53 stage 2 · ridge froze over not recorded 1853-02-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1853-54 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1854-55 stage 2 · ridge froze over not recorded 1855-02-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1855-56 stage 2 · ridge froze over not recorded 1856-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1856-57 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1857-58 stage 2 · ridge froze over not recorded 1858-02-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1858-59 stage 2 · ridge froze over not recorded 1859-01-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1859-60 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1860-61 stage 2 · ridge froze over not recorded 1861-01-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1861-62 stage 2 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1862-63 stage 2 · ridge froze over not recorded 1863-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1863-64 stage 2 · ridge froze over not recorded 1864-01-17 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1864-65 stage 2 · ridge uncertain not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1865-66 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1866-67 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1867-68 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1868-69 stage 2 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1869-70 stage 2 · ridge froze over not recorded 1870-01-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1870-71 stage 2 · ridge froze over not recorded 1871-01-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1871-72 suspended froze over not recorded 1872-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1872-73 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1873-74 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1874-75 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1875-76 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1876-77 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1877-78 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1878-79 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1879-80 suspended never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1880-81 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1881-82 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1882-83 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1883-84 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1884-85 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1885-86 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1886-87 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1887-88 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1888-89 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1889-90 suspended never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1890-91 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1891-92 suspended froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1892-93 stage 3 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1893-94 stage 3 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1894-95 stage 3 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1895-96 stage 3 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1896-97 stage 3 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1897-98 stage 3 · ridge froze over not recorded 1897-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1898-99 stage 3 · ridge froze over not recorded 1899-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1899-00 stage 3 · ridge froze over not recorded 1900-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1900-01 stage 3 · ridge froze over not recorded 1901-01-19 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1901-02 stage 3 · ridge froze over not recorded 1901-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1902-03 stage 3 · ridge froze over not recorded 1903-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1903-04 stage 3 · ridge froze over not recorded 1903-12-22 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1904-05 stage 3 · ridge froze over not recorded 1904-12-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1905-06 stage 3 · ridge froze over not recorded 1906-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1906-07 stage 3 · ridge froze over not recorded 1906-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1907-08 stage 3 · ridge froze over not recorded 1907-12-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1908-09 stage 3 · ridge froze over not recorded 1909-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1909-10 stage 3 · ridge froze over not recorded 1909-12-27 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1910-11 stage 3 · ridge froze over not recorded 1911-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1911-12 stage 3 · ridge froze over not recorded 1912-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1912-13 stage 3 · ridge froze over not recorded 1913-01-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1913-14 stage 3 · ridge froze over not recorded 1914-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1914-15 stage 3 · ridge froze over not recorded 1915-01-10 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1915-16 stage 3 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1916-17 stage 3 · ridge froze over not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1917-18 stage 3 · ridge froze over not recorded 1917-12-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1918-19 stage 3 · ridge froze over not recorded 1919-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1919-20 stage 3 · ridge froze over not recorded 1920-01-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1920-21 stage 3 · ridge froze over not recorded 1921-01-08 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1921-22 stage 3 · ridge froze over not recorded 1922-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1922-23 stage 3 · ridge froze over not recorded 1922-12-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1923-24 stage 4 · ridge froze over not recorded 1924-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1924-25 stage 4 · ridge froze over not recorded 1925-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1925-26 stage 4 · ridge froze over not recorded 1926-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1926-27 stage 4 · ridge froze over not recorded 1926-12-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1927-28 stage 4 · ridge froze over not recorded 1928-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1928-29 stage 4 · ridge froze over not recorded 1928-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1929-30 stage 4 · ridge froze over not recorded 1930-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1930-31 stage 4 · ridge froze over not recorded 1931-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1931-32 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1932-33 stage 4 · ridge froze over not recorded 1933-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1933-34 stage 4 · ridge froze over not recorded 1934-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1934-35 stage 4 · ridge froze over not recorded 1935-02-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1935-36 stage 4 · ridge froze over not recorded 1935-12-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1936-37 stage 4 · ridge froze over not recorded 1937-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1937-38 stage 4 · ridge froze over not recorded 1938-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1938-39 stage 4 · ridge froze over not recorded 1939-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1939-40 stage 4 · ridge froze over not recorded 1940-01-17 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1940-41 stage 4 · ridge froze over not recorded 1941-02-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1941-42 stage 4 · ridge froze over not recorded 1942-01-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1942-43 stage 4 · ridge froze over not recorded 1943-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1943-44 stage 4 · ridge froze over not recorded 1944-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1944-45 stage 4 · ridge froze over not recorded 1945-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1945-46 stage 4 · ridge froze over not recorded 1945-12-27 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1946-47 stage 4 · ridge froze over not recorded 1947-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1947-48 stage 4 · ridge froze over not recorded 1947-12-20 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1948-49 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1949-50 stage 4 · ridge froze over not recorded 1950-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1950-51 stage 4 · ridge froze over not recorded 1950-12-29 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1951-52 stage 4 · ridge froze over not recorded 1952-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1952-53 stage 4 · ridge froze over not recorded 1953-01-05 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1953-54 stage 4 · ridge froze over not recorded 1954-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1954-55 stage 4 · ridge froze over not recorded 1955-01-04 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1955-56 stage 4 · ridge froze over not recorded 1956-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1956-57 stage 4 · ridge froze over not recorded 1956-12-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1957-58 stage 4 · ridge froze over not recorded 1958-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1958-59 stage 4 · ridge froze over not recorded 1959-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1959-60 stage 4 · ridge froze over not recorded 1960-01-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1960-61 stage 4 · ridge froze over not recorded 1961-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1961-62 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1962-63 stage 4 · ridge froze over not recorded 1963-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1963-64 stage 4 · ridge froze over not recorded 1964-02-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1964-65 stage 4 · ridge froze over not recorded 1965-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1965-66 stage 4 · ridge froze over not recorded 1966-01-03 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1966-67 stage 4 · ridge froze over not recorded 1966-12-28 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1967-68 stage 4 · ridge froze over not recorded 1967-12-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1968-69 stage 4 · ridge froze over not recorded 1969-01-09 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1969-70 stage 4 · ridge froze over not recorded 1969-12-21 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1970-71 stage 4 · ridge froze over not recorded 1971-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1971-72 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1972-73 stage 4 · ridge froze over not recorded 1973-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1973-74 stage 4 · ridge froze over not recorded 1973-12-25 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1974-75 stage 4 · ridge froze over not recorded 1975-01-14 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1975-76 stage 4 · ridge froze over not recorded 1976-01-13 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1976-77 stage 4 · ridge froze over not recorded 1976-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1977-78 stage 4 · ridge froze over not recorded 1978-01-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1978-79 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1979-80 stage 4 · ridge froze over not recorded 1980-01-19 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1980-81 stage 4 · ridge froze over not recorded 1980-12-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1981-82 stage 4 · ridge froze over not recorded 1982-01-18 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1982-83 stage 4 · ridge froze over not recorded 1983-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1983-84 stage 4 · ridge froze over not recorded 1984-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1984-85 stage 4 · ridge froze over not recorded 1985-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1985-86 stage 4 · ridge froze over not recorded 1986-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1986-87 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1987-88 stage 4 · ridge froze over not recorded 1988-02-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1988-89 stage 4 · ridge never froze not recorded — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1989-90 stage 4 · ridge froze over 明けの海 1990-01-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1990-91 stage 4 · ridge froze over certified 1991-01-24 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1991-92 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1992-93 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1993-94 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1994-95 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1995-96 stage 4 · ridge froze over 明けの海 1996-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1996-97 stage 4 · ridge froze over 明けの海 1997-01-23 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1997-98 stage 4 · ridge froze over certified 1998-01-11 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1998-99 stage 4 · ridge froze over 明けの海 1999-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 1999-00 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2000-01 stage 4 · ridge froze over 明けの海 2001-01-16 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2001-02 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2002-03 stage 4 · ridge froze over certified 2003-01-06 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2003-04 stage 4 · ridge froze over certified 2004-01-15 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2004-05 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2005-06 stage 4 · ridge froze over certified 2005-12-30 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2006-07 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2007-08 stage 4 · ridge froze over certified 2008-01-26 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2008-09 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2009-10 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2010-11 stage 4 · ridge froze over 明けの海 2011-01-12 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2011-12 stage 4 · ridge froze over certified 2012-01-31 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2012-13 stage 4 · ridge froze over certified 2013-01-07 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2013-14 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2014-15 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2015-16 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2016-17 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2017-18 stage 4 · ridge froze over certified 2018-02-02 NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2018-19 stage 4 · ridge never froze 明けの海 — NSIDC G01377 ARAI1 (DOI 10.7265/N5W66HP8) 2019-20 stage 4 · ridge uncertain 明けの海 — CONFLICT — NSIDC ARAI1 records froze=N for season 2019-20, but 諏訪観光協会 (2024-02-05) states the last season with no full freeze at all was 2019, implying 2020 did freeze. ARAI1's final row may be provisional. Unresolved. 2020-21 stage 4 · ridge froze over 明けの海 — 諏訪観光協会 2024 report (implied: last full-freeze failure before 2024 was 2019) 2021-22 stage 4 · ridge froze over 明けの海 — 諏訪観光協会 2024 report (implied) 2022-23 stage 4 · ridge froze over 明けの海 — 諏訪観光協会 2026 report (implied: 2026 was the first full freeze in three seasons) 2023-24 stage 4 · ridge never froze 明けの海 — 諏訪観光協会 2024-02-05 — 一度も全面結氷しないのは2019年以来5季ぶり 2024-25 stage 4 · ridge never froze 明けの海 — 諏訪観光協会 2026 report (implied: first full freeze in three seasons) 2025-26 stage 4 · ridge froze over 明けの海 2026-01-26 諏訪観光協会 2026-02-06 — 3シーズンぶりに全面結氷、最低気温-10.2度
What this record is, and is not 583 winters on record, 1444 to 2026 — the ice is determinate for 567 of them and unsettled for the other 16 .
八剱神社 has judged this lake since 1443 — with the observation suspended by decree for 21 winters, 1872 to 1892 — the ice for those winters survives in other hands, but the shrine's judgment does not .
the crossing is recorded per season — only from 1990 — earlier crossings sit in 『諏訪史料叢書』巻17, undigitised .
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