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M8.1 earthquake, Peru, 1966-10-17

MagnitudeM8.1mw

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Depth37 km

Time (UTC)1966-10-17 21:41

Rank in 19661 / 109among M6+

Rank since 190066 / 14,458

Energy vs an M6×1,413approx.

67 km W of Paramonga, Peru · -10.70, -78.45

M6.5+ within 300 km (largest first)

1940 M8.2M8.2

1966 M8.1M8.1

1970 M7.9M7.9

1974 M7.6M7.6

1996 M7.5M7.5

1974 M7.2M7.2

1937 M7.1M7.1

1967 M7.0M7.0

1963 M6.9M6.9

1946 M6.8M6.8

1940 M6.7M6.7

1995 M6.5M6.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.9 1963-09-24	1963-09-24 16:30	64 km	28 km W of Paramonga, Peru
M6.0 1963-09-17	1963-09-17 05:54	68 km	24 km W of Paramonga, Peru
M6.1 1962-11-15	1962-11-15 23:25	35 km	138 km SW of Santiago de Cao, Peru
M6.4 1962-04-18	1962-04-18 19:14	49 km	80 km SW of Puerto Casma, Peru
M6.2 1957-01-24	1957-01-24 07:16	20 km	101 km SW of Callao, Peru
M6.1 1948-02-14	1948-02-14 22:00	15 km	10 km SSE of Huaylillas, Peru
M6.8 1946-11-10	1946-11-10 17:42	15 km	6 km SSW of Quiches, Peru
M6.7 1940-05-24	1940-05-24 21:57	45 km	10 km SSW of Huacho, Peru
M8.2 1940-05-24	1940-05-24 16:33	45 km	21 km SE of Huacho, Peru
M7.1 1937-06-21	1937-06-21 15:13	30 km	55 km SW of Santiago de Cao, Peru

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.