M7.0 earthquake 148 km WSW of Adak, Alaska
A magnitude 7.0 earthquake struck 148 km WSW of Adak, Alaska on Mon, Mar 11, 1957, 3:55 AM GMT-11 (14:55 UTC), 25 km (16 mi) below the surface.
A larger quake followed: M7.2 162 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
- 7.0 (mw), strong
- Local time
- UTC
- 1957-03-11 14:55:24 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 51.339° N, 178.602° 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
- ±0.42
- Depth from
- From location
Nearby
Within 100 km, magnitude 4.0 and up: 10 in the 60 days after this one and 2 in the 30 days before it.
After
- 6.5173 km WSW of Adak, Alaska · 25404 days ago · 35 km deep · 25 km away
- 6.4133 km SW of Adak, Alaska · 25404 days ago · 10 km deep · 32 km away
- 7.160 km SW of Adak, Alaska · 25403 days ago · 20 km deep · 96 km away
- 6.6152 km WSW of Adak, Alaska · 25402 days ago · 25 km deep · 13 km away
- 7.2162 km WSW of Adak, Alaska · 25400 days ago · 25 km deep · 21 km away
- 6.0Andreanof Islands, Aleutian Islands, Alaska · 25399 days ago · 35 km deep · 56 km away
- 5.8125 km WSW of Adak, Alaska · 25384 days ago · 35 km deep · 31 km away
- 5.9Andreanof Islands, Aleutian Islands, Alaska · 25375 days ago · 35 km deep · 34 km away
- 5.0135 km WSW of Adak, Alaska · 25373 days ago · 19 km away
- 5.8178 km WSW of Adak, Alaska · 25369 days ago · 35 km deep · 33 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem886103 (also filed as ushis2158). Read Tue, Sep 29, 2026, 7:31 PM UTC.