M 5.9 earthquake – 135 km SSE of Attu Station, Alaska
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Local time: Feb 4, 1965 · 19:14 (UTC+12)
ModerateShallow · 20 km
Reviewed by a seismologist
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- Magnitude
- 5.9moment magnitude (mw)
- Depth
- 20 kmShallow earthquake
- Epicenter
- 51.730, 173.9751,051 km from Petropavlovsk-Kamchatsky
- Energy released
- 11 kilotons of TNTless than one Hiroshima bomb
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- —not estimated
- Aftershocks
- 4M2.5+ within 30 km, up to 60 days
- Significance
- 543USGS score, 0–1,000+
Not rare around here
An earthquake at least as strong struck within 300 km on Feb 4, 1965.
How strong was it?
Moderate earthquake. It released 11 kilotons of TNT, 22 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
4 earthquakes of M2.5+ within 30 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900, around United States.
- 8.3 1906 Western Aleutian Islands (Hawadax/Rat Islands) Earthquake Aug 17, 1906
- 7.9 93 km NW of Attu Station, Alaska Dec 17, 1929
- 7.6 36 km NE of Attu Station, Alaska Feb 2, 1975
- 7.4 151 km S of Attu Station, Alaska Sep 2, 1907
- 7.2 238 km SSE of Attu Station, Alaska Sep 8, 1939
- 7.1 Rat Islands, Aleutian Islands, Alaska Mar 17, 2003
- 7.1 24 km E of Attu Station, Alaska Apr 16, 1940
- 7.0 80 km SSE of Attu Station, Alaska Apr 16, 1940