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M6.6 earthquake, Japan, 1942-02-21

MagnitudeM6.6mw

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Depth35 km

Time (UTC)1942-02-21 07:07

Rank in 194222 / 99among M6+

Rank since 19003345 / 14,458

Energy vs an M6×9approx.

76 km ENE of Namie, Japan · 37.72, 141.81

M6.5+ within 300 km (largest first)

2011 M9.1M9.1

1933 M8.4M8.4

1960 M8.0M8.0

2011 M7.9M7.9

1938 M7.8M7.8

1938 M7.7M7.7

1978 M7.7M7.7

2011 M7.7M7.7

1905 M7.7M7.7

1964 M7.6M7.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1941-11-25	1941-11-25 15:20	25 km	82 km ESE of Takahagi, Japan
M6.2 1941-05-09	1941-05-09 09:32	25 km	110 km ESE of Takahagi, Japan
M6.0 1941-03-19	1941-03-19 02:44	20 km	106 km E of Miyako, Japan
M6.1 1941-03-14	1941-03-14 14:30	20 km	122 km E of Miyako, Japan
M6.2 1941-03-12	1941-03-12 21:36	20 km	149 km E of Yamada, Japan
M6.3 1941-03-12	1941-03-12 14:16	20 km	136 km E of Yamada, Japan
M6.6 1940-11-19	1940-11-19 15:01	44 km	51 km SE of Kamaishi, Japan
M6.1 1940-11-14	1940-11-14 10:33	25 km	83 km ENE of Hasaki, Japan
M6.2 1940-06-12	1940-06-12 13:59	15 km	near the east coast of Honshu, Japan
M6.1 1940-02-09	1940-02-09 13:53	35 km	86 km NE of Miyako, 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.