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M6.6 earthquake, Japan, 1931-03-11

MagnitudeM6.6mw

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Depth35 km

Time (UTC)1931-03-11 12:26

Rank in 193129 / 124among M6+

Rank since 19003860 / 14,458

Energy vs an M6×7approx.

Volcano Islands, Japan region · 23.32, 143.58

M6.5+ within 300 km (largest first)

1914 M7.9M7.9

2000 M7.6M7.6

1934 M7.5M7.5

2007 M7.5M7.5

1905 M7.2M7.2

1954 M7.2M7.2

1955 M7.2M7.2

1947 M7.2M7.2

1945 M7.2M7.2

1913 M7.1M7.1

1947 M7.0M7.0

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1929-03-09	1929-03-09 02:11	35 km	Volcano Islands, Japan region
M6.0 1920-01-12	1920-01-12 13:39	15 km	Volcano Islands, Japan region
M7.9 1914-11-24	1914-11-24 11:53	200 km	Volcano Islands, Japan region
M7.1 1913-03-23	1913-03-23 20:47	360 km	Volcano Islands, Japan region
M7.2 1905-07-11	1905-07-11 15:37	200 km	Mariana Islands region
M6.8 1905-05-11	1905-05-11 17:09	15 km	Volcano Islands, Japan region

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.