M5.7 earthquake 84 km SE of Chiniak, Alaska
A magnitude 5.7 earthquake struck 84 km SE of Chiniak, Alaska on Tue, Mar 31, 1964, 5:23 PM GMT-10 (03:23 UTC), 23 km (14 mi) below the surface.
A larger quake followed: M5.9 56 km SE of Old Harbor, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.7 (mw), moderate
- Local time
- UTC
- 1964-04-01 03:23:18 UTC
- Depth
- 22.9 km (14.2 mi), shallow
- Epicenter
- 57.099° N, 151.245° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.20
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 8 in the 60 days after this one and 8 in the 30 days before it.
After
- 5.956 km SE of Old Harbor, Alaska · 22818 days ago · 22 km deep · 97 km away
- 6.398 km SE of Old Harbor, Alaska · 22810 days ago · 10 km deep · 95 km away
- 5.7133 km SE of Old Harbor, Alaska · 22809 days ago · 15 km deep · 80 km away
- 5.647 km ESE of Chiniak, Alaska · 22808 days ago · 27 km deep · 46 km away
- 5.541 km E of Chiniak, Alaska · 22805 days ago · 20 km deep · 61 km away
- 5.645 km SSE of Chiniak, Alaska · 22798 days ago · 25 km deep · 43 km away
- 5.8102 km SE of Old Harbor, Alaska · 22785 days ago · 21 km deep · 81 km away
- 6.297 km SSE of Old Harbor, Alaska · 22779 days ago · 24 km deep · 100 km away
Before
- 6.094 km SE of Old Harbor, Alaska · 22822 days ago · 15 km deep · 81 km away
- 5.550 km ESE of Chiniak, Alaska · 22824 days ago · 21 km deep · 43 km away
- 5.668 km ESE of Chiniak, Alaska · 22824 days ago · 20 km deep · 22 km away
- 6.253 km ESE of Old Harbor, Alaska · 22825 days ago · 25 km deep · 75 km away
- 5.9114 km SE of Old Harbor, Alaska · 22825 days ago · 20 km deep · 94 km away
- 5.639 km ESE of Chiniak, Alaska · 22825 days ago · 23 km deep · 47 km away
- 5.855 km SE of Chiniak, Alaska · 22825 days ago · 20 km deep · 29 km away
- 5.925 km E of Old Harbor, Alaska · 22825 days ago · 25 km deep · 99 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem868176. Read Wed, Sep 23, 2026, 10:06 PM UTC.