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M7.2 earthquake, Russia, 1973-02-28

MagnitudeM7.2ms

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Depth27 km

Time (UTC)1973-02-28 06:37

Rank in 19735 / 93among M6+

Rank since 1900909 / 14,458

Energy vs an M6×63approx.

38 km ESE of Severo-Kuril’sk, Russia · 50.49, 156.58

M6.5+ within 300 km (largest first)

1915 M7.8M7.8

2020 M7.5M7.5

1993 M7.5M7.5

1911 M7.4M7.4

1916 M7.4M7.4

1907 M7.2M7.2

1973 M7.2M7.2

1913 M7.0M7.0

1993 M7.0M7.0

1963 M6.9M6.9

1999 M6.9M6.9

2013 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1972-08-04	1972-08-04 17:51	35 km	171 km S of Severo-Kuril’sk, Russia
M6.8 1972-03-22	1972-03-22 10:27	140 km	257 km SW of Severo-Kuril’sk, Russia
M6.3 1971-08-19	1971-08-19 22:15	39 km	162 km SSW of Severo-Kuril’sk, Russia
M6.5 1969-06-13	1969-06-13 08:48	57 km	151 km SSW of Severo-Kuril’sk, Russia
M6.0 1969-03-03	1969-03-03 14:49	31 km	162 km SSE of Vilyuchinsk, Russia
M6.0 1967-12-16	1967-12-16 20:54	52 km	78 km ESE of Ozernovskiy, Russia
M6.3 1967-12-01	1967-12-01 13:57	143 km	183 km SW of Severo-Kuril’sk, Russia
M6.2 1966-04-08	1966-04-08 01:46	45 km	82 km ESE of Ozernovskiy, Russia
M6.2 1964-01-06	1964-01-06 23:45	45 km	77 km ENE of Severo-Kuril’sk, Russia
M6.9 1963-05-22	1963-05-22 13:56	30 km	251 km SSW of Severo-Kuril’sk, Russia

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.