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M7.1 earthquake, Alaska, 1979-02-28

MagnitudeM7.1ms

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Depth15 km

Time (UTC)1979-02-28 21:27

Rank in 19795 / 86among M6+

Rank since 19001148 / 14,458

Energy vs an M6×45approx.

113 km SE of McCarthy, Alaska · 60.64, -141.59

M6.5+ within 300 km (largest first)

1987 M7.9M7.9

1979 M7.1M7.1

2025 M7.0M7.0

1987 M6.9M6.9

1908 M6.7M6.7

1970 M6.7M6.7

1912 M6.7M6.7

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.1 1970-08-18	1970-08-18 17:52	27 km	13 km ENE of Cordova, Alaska
M6.7 1970-04-16	1970-04-16 05:33	10 km	163 km W of Yakutat, Alaska
M6.2 1970-02-24	1970-02-24 08:05	17 km	165 km SE of Cordova, Alaska
M6.1 1965-09-30	1965-09-30 23:47	20 km	171 km SE of Cordova, Alaska
M6.0 1964-03-30	1964-03-30 07:09	11 km	78 km S of Cordova, Alaska
M6.3 1964-03-28	1964-03-28 14:49	10 km	56 km WSW of Cordova, Alaska
M6.3 1964-03-28	1964-03-28 14:47	10 km	60 km SW of Cordova, Alaska
M6.1 1964-03-28	1964-03-28 09:52	15 km	101 km SE of Chenega, Alaska
M6.2 1944-02-03	1944-02-03 12:15	15 km	101 km SSW of Haines Junction, Canada
M6.1 1920-07-07	1920-07-07 18:41	15 km	109 km E of McCarthy, Alaska

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.