Home › 1987 › Alaska

M7.9 earthquake, Alaska, 1987-11-30

MagnitudeM7.9mw

This page is updated only once a day and is not an alert service. For current earthquake and tsunami information, check the Japan Meteorological Agency, the USGS and your local authorities.

Depth10 km

Time (UTC)1987-11-30 19:23

Rank in 19871 / 166among M6+

Rank since 1900130 / 14,458

Energy vs an M6×708approx.

200 km WSW of Yakutat, Alaska · 58.68, -142.79

M6.5+ within 300 km (largest first)

1987 M7.9M7.9

1988 M7.8M7.8

1979 M7.1M7.1

2025 M7.0M7.0

1987 M6.9M6.9

1992 M6.9M6.9

1908 M6.7M6.7

1970 M6.7M6.7

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.9 1987-11-17	1987-11-17 08:46	10 km	Gulf of Alaska
M7.1 1979-02-28	1979-02-28 21:27	15 km	113 km SE of McCarthy, Alaska
M6.0 1973-07-03	1973-07-03 16:59	33 km	101 km WSW of Elfin Cove, Alaska
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
M6.1 1964-09-16	1964-09-16 01:50	14 km	53 km E of Chenega, 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

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.