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M6.7 earthquake, Alaska, 1977-02-19

MagnitudeM6.7ms

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Depth33 km

Time (UTC)1977-02-19 22:34

Rank in 197717 / 85among M6+

Rank since 19002828 / 14,458

Energy vs an M6×11approx.

225 km WNW of Attu Station, Alaska · 53.57, 170.03

M6.5+ within 300 km (largest first)

1929 M7.9M7.9

2017 M7.7M7.7

1975 M7.6M7.6

1907 M7.4M7.4

1990 M7.1M7.1

1940 M7.0M7.0

1925 M7.0M7.0

1909 M7.0M7.0

1953 M7.0M7.0

1988 M6.9M6.9

2017 M6.8M6.8

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.6 1975-08-15	1975-08-15 07:28	4 km	Komandorskiye Ostrova, Russia region
M7.6 1975-02-02	1975-02-02 08:43	10 km	36 km NE of Attu Station, Alaska
M6.0 1973-12-29	1973-12-29 08:20	33 km	Komandorskiye Ostrova, Russia region
M6.4 1971-07-25	1971-07-25 15:41	28 km	81 km S of Attu Station, Alaska
M6.2 1968-08-22	1968-08-22 14:00	33 km	136 km W of Attu Station, Alaska
M6.0 1965-04-08	1965-04-08 13:43	15 km	76 km SSE of Attu Station, Alaska
M6.3 1965-03-03	1965-03-03 16:47	26 km	128 km W of Attu Station, Alaska
M6.2 1965-02-25	1965-02-25 05:22	27 km	98 km S of Attu Station, Alaska
M6.0 1965-02-09	1965-02-09 17:37	30 km	86 km W of Attu Station, Alaska
M6.4 1965-02-04	1965-02-04 14:18	26 km	142 km W of Attu Station, 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.