M5.8 earthquake 220 km ESE of Atka, Alaska
A magnitude 5.8 earthquake struck 220 km ESE of Atka, Alaska on Thu, Mar 28, 1957, 9:08 AM GMT-11 (20:08 UTC), 25 km (16 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
- 5.8 (mw), moderate
- Local time
- UTC
- 1957-03-28 20:08:25 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 51.396° N, 171.284° 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 2.8 and up: 2 in the 60 days after this one and 4 in the 30 days before it.
After
- 6.3143 km E of Atka, Alaska · 25381 days ago · 35 km deep · 90 km away
- 6.0228 km ESE of Atka, Alaska · 25338 days ago · 20 km deep · 20 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem886280 (also filed as ushis2201). Read Wed, Sep 30, 2026, 5:52 PM UTC.