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M7.4 earthquake, Chile, 1983-10-04

MagnitudeM7.4mw

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Depth15 km

Time (UTC)1983-10-04 18:52

Rank in 19833 / 136among M6+

Rank since 1900581 / 14,458

Energy vs an M6×126approx.

54 km WSW of Diego de Almagro, Chile · -26.54, -70.56

M6.5+ within 300 km (largest first)

1922 M8.5M8.5

1918 M8.0M8.0

1966 M7.7M7.7

1987 M7.6M7.6

1936 M7.5M7.5

1909 M7.5M7.5

1939 M7.4M7.4

1983 M7.4M7.4

1960 M7.3M7.3

1988 M7.2M7.2

1998 M7.1M7.1

1942 M7.1M7.1

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.1 1982-01-28	1982-01-28 14:26	33 km	143 km W of Copiapó, Chile
M6.1 1980-07-19	1980-07-19 11:52	110 km	115 km ESE of Vallenar, Chile
M6.1 1979-04-28	1979-04-28 11:38	23 km	62 km W of Copiapó, Chile
M6.3 1978-08-03	1978-08-03 18:11	58 km	51 km WSW of Diego de Almagro, Chile
M6.3 1977-01-17	1977-01-17 21:27	33 km	185 km NW of Antofagasta de la Sierra, Argentina
M6.3 1973-08-07	1973-08-07 14:22	14 km	83 km NW of Copiapó, Chile
M6.1 1973-08-07	1973-08-07 03:41	25 km	84 km NW of Copiapó, Chile
M6.3 1973-07-31	1973-07-31 10:51	33 km	120 km WNW of Copiapó, Chile
M6.3 1971-06-17	1971-06-17 21:00	90 km	152 km E of Taltal, Chile
M6.0 1969-11-13	1969-11-13 07:51	24 km	133 km NW of Vallenar, 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.