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M6.6 earthquake, California, 1971-02-09

MagnitudeM6.6mw

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Depth9 km

Time (UTC)1971-02-09 14:00

Rank in 197134 / 143among M6+

Rank since 19003446 / 14,458

Energy vs an M6×8approx.

1971 San Fernando Earthquake, California · 34.42, -118.37

M6.5+ within 300 km (largest first)

1952 M7.5M7.5

1992 M7.3M7.3

1999 M7.1M7.1

2019 M7.1M7.1

1927 M6.9M6.9

1925 M6.8M6.8

1918 M6.7M6.7

1994 M6.7M6.7

1983 M6.7M6.7

1942 M6.6M6.6

1968 M6.6M6.6

1987 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.6 1968-04-09	1968-04-09 02:28	10 km	The 1968 Borrego Mountain, California Earthquake
M6.4 1954-03-19	1954-03-19 09:54	6 km	The 1954 San Jacinto Fault, California Earthquake
M7.5 1952-07-21	1952-07-21 11:52	6 km	The 1952 Kern County, California Earthquake
M6.0 1948-12-04	1948-12-04 23:43	6 km	The 1948 Desert Hot Springs, California Earthquake
M6.5 1947-04-10	1947-04-10 15:58	6 km	The 1947 Manix, California Earthquake
M6.3 1946-03-15	1946-03-15 13:49	6 km	The 1946 Walker Pass, California Earthquake
M6.6 1942-10-21	1942-10-21 16:22	6 km	The 1942 Fish Creek Mountains, California Earthquake
M6.0 1937-03-25	1937-03-25 16:49	6 km	16km WSW of Oasis, CA
M6.4 1933-03-11	1933-03-11 01:54	6 km	The 1933 Long Beach, California Earthquake
M6.9 1927-11-04	1927-11-04 13:51	10 km	The 1927 Lompoc, California Earthquake

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.