M5.0 earthquake 135 km WSW of Adak, Alaska
A magnitude 5.0 earthquake struck 135 km WSW of Adak, Alaska on Thu, Apr 11, 1957, 5:17 PM GMT-11 (04:17 UTC).
A larger quake followed: M5.8 202 km WSW of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.0 (uk), moderate
- Local time
- UTC
- 1957-04-12 04:17:45 UTC
- Depth
- Not given
- Epicenter
- 51.500° N, 178.500° 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.
Nearby
Within 100 km, magnitude 2.0 and up: 2 in the 60 days after this one and 5 in the 30 days before it.
After
- 5.8178 km WSW of Adak, Alaska · 25370 days ago · 35 km deep · 43 km away
- 5.8202 km WSW of Adak, Alaska · 25324 days ago · 25 km deep · 69 km away
Before
- 5.9Andreanof Islands, Aleutian Islands, Alaska · 25376 days ago · 35 km deep · 52 km away
- 5.8125 km WSW of Adak, Alaska · 25385 days ago · 35 km deep · 12 km away
- 6.0Andreanof Islands, Aleutian Islands, Alaska · 25399 days ago · 35 km deep · 65 km away
- 7.2162 km WSW of Adak, Alaska · 25400 days ago · 25 km deep · 27 km away
- 6.6152 km WSW of Adak, Alaska · 25403 days ago · 25 km deep · 17 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event ushis2216. Read Wed, Sep 30, 2026, 1:02 PM UTC.