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M7.5 earthquake, Mariana Islands, 1940-01-17

MagnitudeM7.5mw

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Depth15 km

Time (UTC)1940-01-17 01:14

Rank in 19404 / 105among M6+

Rank since 1900442 / 14,458

Energy vs an M6×178approx.

Mariana Islands region · 17.14, 148.06

M6.5+ within 300 km (largest first)

1940 M7.7M7.7

1990 M7.6M7.6

1902 M7.5M7.5

1940 M7.5M7.5

1930 M7.2M7.2

1949 M7.1M7.1

1942 M7.0M7.0

1970 M6.6M6.6

2005 M6.6M6.6

1921 M6.6M6.6

1938 M6.5M6.5

1930 M6.5M6.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.5 1938-12-01	1938-12-01 02:12	25 km	258 km NE of Saipan, Northern Mariana Islands
M6.3 1932-03-19	1932-03-19 10:59	15 km	215 km ENE of Saipan, Northern Mariana Islands
M6.5 1930-10-28	1930-10-28 21:10	25 km	Pagan region, Northern Mariana Islands
M7.2 1930-10-24	1930-10-24 20:15	25 km	Pagan region, Northern Mariana Islands
M6.6 1921-02-10	1921-02-10 23:53	15 km	Alamagan region, Northern Mariana Islands
M7.5 1902-09-22	1902-09-22 01:46	–	Northern Mariana Islands

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.