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M6.6 earthquake, Japan, 1921-03-03

MagnitudeM6.6mw

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Depth15 km

Time (UTC)1921-03-03 03:02

Rank in 192118 / 61among M6+

Rank since 19003364 / 14,458

Energy vs an M6×8approx.

92 km WSW of Kamiiso, Japan · 41.49, 139.62

M6.5+ within 300 km (largest first)

1931 M7.9M7.9

1968 M7.9M7.9

1993 M7.7M7.7

2025 M7.6M7.6

1901 M7.5M7.5

1983 M7.4M7.4

1901 M7.2M7.2

1939 M7.2M7.2

1945 M7.2M7.2

1947 M7.1M7.1

1914 M7.0M7.0

1964 M7.0M7.0

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.4 1919-10-11	1919-10-11 13:17	15 km	84 km NW of Noshiro, Japan
M7.0 1914-03-14	1914-03-14 20:00	15 km	13 km ESE of Yokote, Japan
M6.8 1913-02-20	1913-02-20 08:59	15 km	30 km ESE of Tomakomai, Japan
M6.2 1912-06-08	1912-06-08 04:41	15 km	25 km WSW of Muroran, Japan
M6.6 1909-09-16	1909-09-16 19:38	35 km	24 km S of Shizunai-furukawach?, Japan
M6.0 1907-08-05	1907-08-05 01:55	20 km	84 km W of Noshiro, Japan
M7.5 1901-08-09	1901-08-09 18:33	35 km	Near the east coast of Honshu, Japan
M7.2 1901-08-09	1901-08-09 09:23	35 km	Near the east coast of Honshu, Japan

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.