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M6.8 earthquake, Chile, 1956-12-18

MagnitudeM6.8mw

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Depth45 km

Time (UTC)1956-12-18 02:31

Rank in 19569 / 109among M6+

Rank since 19002215 / 14,458

Energy vs an M6×16approx.

Near the coast of Antofagasta, Chile · -25.55, -70.04

M6.5+ within 300 km (largest first)

1950 M8.2M8.2

1918 M8.0M8.0

1995 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

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1956-01-18	1956-01-18 08:07	35 km	72 km S of Antofagasta, Chile
M6.3 1955-11-17	1955-11-17 06:53	34 km	11 km WSW of Diego de Almagro, Chile
M8.2 1950-12-09	1950-12-09 21:38	114 km	121 km SSE of San Pedro de Atacama, Chile
M6.2 1947-01-21	1947-01-21 20:06	35 km	76 km S of Antofagasta, Chile
M6.9 1946-08-02	1946-08-02 19:18	39 km	52 km W of Diego de Almagro, Chile
M6.1 1946-05-10	1946-05-10 23:32	65 km	144 km ENE of Taltal, Chile
M6.5 1944-12-22	1944-12-22 22:31	45 km	41 km SE of Taltal, Chile
M7.1 1942-07-08	1942-07-08 06:55	35 km	87 km SSE of Antofagasta, Chile
M7.4 1939-04-18	1939-04-18 06:22	35 km	Atacama, Chile
M6.5 1937-03-14	1937-03-14 11:55	15 km	65 km NNW of Taltal, 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.