M 8.7 earthquake – 1965 Western Aleutian Islands (Hawadax/Rat Islands) Earthquake
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Local time: Feb 4, 1965 · 17:01 (UTC+12)
GreatShallow · 30 km
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- Magnitude
- 8.7moment magnitude (mw)
- Depth
- 30 kmShallow earthquake
- Epicenter
- 51.251, 178.7151,382 km from Petropavlovsk-Kamchatsky
- Energy released
- 169 megatons of TNTabout 11,280 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 6.9max. instrumental (MMI)
- Aftershocks
- 66M2.5+ within 500 km, up to 60 days
- Significance
- 1,164USGS score, 0–1,000+
The strongest within 300 km on record
No earthquake this strong has been recorded this close since our catalog begins in 1900.
How strong was it?
Great earthquake. It released 169 megatons of TNT, 354,813 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
66 earthquakes of M2.5+ within 500 km in the 60 days after.
- 5.7 272 km S of Attu Station, Alaska Feb 4, 1965
- 5.8 196 km SE of Attu Station, Alaska Feb 4, 1965
- 6.0 185 km SE of Attu Station, Alaska Feb 4, 1965
- 5.7 87 km WSW of Attu Station, Alaska Feb 4, 1965
- 5.8 221 km SE of Attu Station, Alaska Feb 4, 1965
- 5.5 71 km S of Attu Station, Alaska Feb 4, 1965
- 5.9 Rat Islands, Aleutian Islands, Alaska Feb 4, 1965
- 5.9 135 km SSE of Attu Station, Alaska Feb 4, 1965
- 5.7 119 km S of Attu Station, Alaska Feb 4, 1965
- 5.7 43 km WSW of Attu Station, Alaska Feb 4, 1965
The strongest earthquakes within 300 km
Since 1900.
- 8.3 1906 Western Aleutian Islands (Hawadax/Rat Islands) Earthquake Aug 17, 1906
- 7.9 Rat Islands, Aleutian Islands, Alaska Jun 23, 2014
- 7.9 77 km WSW of Adak, Alaska Jun 10, 1996
- 7.8 Rat Islands, Aleutian Islands, Alaska Nov 17, 2003
- 7.6 Rat Islands, Aleutian Islands, Alaska Mar 30, 1965
- 7.4 265 km WSW of Adak, Alaska Feb 4, 1965
- 7.3 88 km WSW of Adak, Alaska Jul 7, 1929
- 7.2 238 km SSE of Attu Station, Alaska Sep 8, 1939
In the week before
Earthquakes within 500 km in the 7 days before this one: possible foreshocks.