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M7.2 earthquake, Chile, 1931-03-18

MagnitudeM7.2mw

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Depth35 km

Time (UTC)1931-03-18 08:02

Rank in 193114 / 124among M6+

Rank since 1900888 / 14,458

Energy vs an M6×63approx.

37 km S of San Antonio, Chile · -33.93, -71.56

M6.5+ within 300 km (largest first)

2010 M8.8M8.8

2015 M8.3M8.3

1906 M8.2M8.2

1943 M8.1M8.1

1985 M8.0M8.0

1939 M7.8M7.8

1971 M7.8M7.8

1928 M7.7M7.7

1914 M7.7M7.7

1965 M7.4M7.4

1985 M7.4M7.4

1928 M7.2M7.2

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.5 1930-10-17	1930-10-17 08:46	35 km	17 km NNE of Hacienda La Calera, Chile
M7.2 1928-12-02	1928-12-02 04:20	30 km	47 km NW of Cauquenes, Chile
M6.2 1928-12-01	1928-12-01 18:32	35 km	13 km S of Constitución, Chile
M6.0 1928-12-01	1928-12-01 09:19	35 km	67 km WNW of Quirihue, Chile
M7.7 1928-12-01	1928-12-01 04:06	35 km	30 km NNE of Constitución, Chile
M6.1 1928-05-01	1928-05-01 00:11	35 km	17 km S of Constitución, Chile
M6.3 1926-09-06	1926-09-06 00:16	15 km	210 km WNW of Constitución, Chile
M6.0 1925-08-11	1925-08-11 19:41	35 km	22 km S of Constitución, Chile
M6.1 1922-05-21	1922-05-21 15:40	15 km	187 km NW of Constitución, Chile
M6.5 1914-01-30	1914-01-30 07:35	15 km	99 km SE of Rengo, Chile

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.