M6.4 earthquake 146 km S of Adak, Alaska
A magnitude 6.4 earthquake struck 146 km S of Adak, Alaska on Sun, Mar 10, 1957, 1:45 AM GMT-11 (12:45 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.8 90 km SSW 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
- 6.4 (uk), strong
- Local time
- UTC
- 1957-03-10 12:45:37 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 50.566° N, 176.831° 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 2.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 6.890 km SSW of Adak, Alaska · 25398 days ago · 15 km deep · 60 km away
- 6.0136 km S of Adak, Alaska · 25398 days ago · 33 km deep · 14 km away
- 7.175 km S of Adak, Alaska · 25394 days ago · 25 km deep · 70 km away
- 6.061 km SSW of Adak, Alaska · 25389 days ago · 35 km deep · 86 km away
- 5.8176 km S of Adak, Alaska · 25367 days ago · 14 km deep · 30 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event ushis2145. Read Tue, Sep 22, 2026, 8:21 PM UTC.