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M7.8 earthquake, Russia, 1963-10-20

MagnitudeM7.8mw

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Depth28 km

Time (UTC)1963-10-20 00:53

Rank in 19633 / 129among M6+

Rank since 1900184 / 14,458

Energy vs an M6×501approx.

217 km ESE of Kuril’sk, Russia · 44.73, 150.55

M6.5+ within 300 km (largest first)

1963 M8.5M8.5

1958 M8.3M8.3

1994 M8.3M8.3

2006 M8.3M8.3

1969 M8.2M8.2

1918 M8.1M8.1

1995 M7.9M7.9

1918 M7.8M7.8

1963 M7.8M7.8

1978 M7.6M7.6

1991 M7.6M7.6

1978 M7.5M7.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1963-10-17	1963-10-17 23:24	52 km	116 km SE of Kuril’sk, Russia
M6.1 1963-10-14	1963-10-14 13:21	27 km	250 km ESE of Kuril’sk, Russia
M6.0 1963-10-14	1963-10-14 04:11	37 km	230 km ESE of Kuril’sk, Russia
M6.2 1963-10-13	1963-10-13 23:52	34 km	227 km ESE of Kuril’sk, Russia
M6.2 1963-10-13	1963-10-13 17:25	15 km	233 km ESE of Kuril’sk, Russia
M6.1 1963-10-13	1963-10-13 15:59	35 km	214 km E of Kuril’sk, Russia
M6.0 1963-10-13	1963-10-13 12:58	39 km	203 km ESE of Kuril’sk, Russia
M8.5 1963-10-13	1963-10-13 05:17	35 km	1963 Kuril Islands Earthquake
M7.0 1963-10-12	1963-10-12 11:27	38 km	124 km ESE of Kuril’sk, Russia
M6.2 1963-07-10	1963-07-10 05:23	30 km	Kuril Islands

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.