M3.1 earthquake 246 km SSE of Perryville, Alaska
A magnitude 3.1 earthquake struck 246 km SSE of Perryville, Alaska on Sat, Mar 20, 2021, 10:44 AM AKDT (18:44 UTC), 20 km (12 mi) below the surface.
A larger quake followed: M3.3 209 km SE of Perryville, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.1 (ml), minor
- Local time
- UTC
- 2021-03-20 18:44:57 UTC
- Depth
- 19.8 km (12.3 mi), shallow
- Epicenter
- 53.953° N, 157.354° 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.
- Location uncertainty
- About 7.3 km horizontally, 8.1 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 219°, poorly surrounded by stations
- Stations used
- 84
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.9210 km SE of Perryville, Alaska · 2009 days ago · 9 km deep · 89 km away
- 3.3209 km SE of Perryville, Alaska · 2009 days ago · 12 km deep · 88 km away
- 2.8206 km SE of Perryville, Alaska · 2007 days ago · 9 km deep · 96 km away
- 2.9south of Alaska · 1994 days ago · 18 km deep · 98 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000e1af (also filed as ak0213myfv5l). Read Sat, Sep 26, 2026, 3:25 PM UTC.