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M6.6 earthquake, Mariana Islands, 1947-06-13

MagnitudeM6.6mw

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Depth20 km

Time (UTC)1947-06-13 23:50

Rank in 194726 / 83among M6+

Rank since 19003418 / 14,458

Energy vs an M6×8approx.

Mariana Islands region · 21.72, 145.69

M6.5+ within 300 km (largest first)

2000 M7.6M7.6

1934 M7.5M7.5

1905 M7.2M7.2

1947 M7.2M7.2

1947 M7.0M7.0

2023 M6.9M6.9

1962 M6.9M6.9

2024 M6.8M6.8

1986 M6.7M6.7

1966 M6.7M6.7

1939 M6.6M6.6

1960 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.0 1947-06-13	1947-06-13 20:24	35 km	Mariana Islands region
M6.6 1939-05-17	1939-05-17 18:30	35 km	Volcano Islands, Japan region
M7.5 1934-02-24	1934-02-24 06:23	35 km	Volcano Islands, Japan region
M6.2 1931-03-12	1931-03-12 10:40	15 km	Volcano Islands, Japan region
M6.6 1931-03-11	1931-03-11 12:26	35 km	Volcano Islands, Japan region
M6.0 1920-01-12	1920-01-12 13:39	15 km	Volcano Islands, Japan region
M6.4 1919-08-27	1919-08-27 05:21	35 km	Mariana Islands region
M7.2 1905-07-11	1905-07-11 15:37	200 km	Mariana Islands 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.