M3.0 earthquake 229 km S of Unalaska, Alaska
A magnitude 3.0 earthquake struck 229 km S of Unalaska, Alaska on Sun, Sep 13, 2020, 2:59 PM AKDT (22:59 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.3 192 km SSE of Unalaska, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (ml), minor
- Local time
- UTC
- 2020-09-13 22:59:48 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 51.838° N, 165.989° 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 8.6 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 245°, poorly surrounded by stations
- Stations used
- 24
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 3.2171 km SE of Nikolski, Alaska · 2194 days ago · 10 km deep · 89 km away
- 3.3192 km SSE of Unalaska, Alaska · 2189 days ago · 10 km deep · 67 km away
- 2.2227 km SSE of Unalaska, Alaska · 2184 days ago · 7 km deep · 74 km away
- 2.1144 km ESE of Nikolski, Alaska · 2170 days ago · 26 km deep · 93 km away
- 3.3192 km SE of Nikolski, Alaska · 2149 days ago · 10 km deep · 40 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000c05x (also filed as ak020btekhfh). Read Sun, Sep 27, 2026, 11:06 AM UTC.