M3.8 earthquake 260 km SE of Akutan, Alaska
A magnitude 3.8 earthquake struck 260 km SE of Akutan, Alaska on Sat, Sep 5, 2020, 3:04 AM AKDT (11:04 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.9 258 km SSE of False Pass, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2020-09-05 11:04:27 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 52.392° N, 163.160° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 3.8 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.091 · 31 stations |
| 3.6 | ML, local (Richter) | Alaska Earthquake Center | Preliminary |
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 5.4 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 175°
- Stations used
- 43
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 2 in the 30 days before it.
After
- 3.0207 km SE of Akutan, Alaska · 2188 days ago · 10 km deep · 53 km away
- 3.3236 km SSE of False Pass, Alaska · 2186 days ago · 10 km deep · 75 km away
- 2.3202 km SE of Akutan, Alaska · 2182 days ago · 7 km deep · 65 km away
- 2.8238 km S of False Pass, Alaska · 2181 days ago · 10 km deep · 38 km away
- 2.8212 km SSE of Akutan, Alaska · 2179 days ago · 10 km deep · 84 km away
- 2.6246 km S of False Pass, Alaska · 2165 days ago · 10 km deep · 35 km away
- 4.9258 km SSE of False Pass, Alaska · 2157 days ago · 12 km deep · 44 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000bif4 (also filed as ak020bfze5u0). Read Thu, Oct 1, 2026, 12:08 PM UTC.