M6.1 earthquake 207 km ESE of Atka, Alaska
A magnitude 6.1 earthquake struck 207 km ESE of Atka, Alaska on Tue, Mar 12, 1957, 3:48 PM GMT-11 (02:48 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M6.3 143 km E of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.1 (mw), strong
- Local time
- UTC
- 1957-03-13 02:48:27 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.657° N, 171.314° 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
Nearby
Within 100 km, magnitude 3.1 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 6.0164 km WSW of Nikolski, Alaska · 25398 days ago · 39 km deep · 80 km away
- 6.0182 km E of Atka, Alaska · 25392 days ago · 70 km away
- 5.8220 km ESE of Atka, Alaska · 25387 days ago · 25 km deep · 29 km away
- 6.3143 km E of Atka, Alaska · 25380 days ago · 35 km deep · 69 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem886136 (also filed as ushis2167). Read Wed, Sep 30, 2026, 1:04 AM UTC.