M3.3 earthquake 192 km SSE of Unalaska, Alaska
A magnitude 3.3 earthquake struck 192 km SSE of Unalaska, Alaska on Mon, Sep 28, 2020, 10:40 PM AKDT (06:40 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.7 156 km SSE of Akutan, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ml), minor
- Local time
- UTC
- 2020-09-29 06:40:15 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 52.296° N, 165.363° 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 5.8 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 264°, poorly surrounded by stations
- Stations used
- 26
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
- 2.2227 km SSE of Unalaska, Alaska · 2183 days ago · 7 km deep · 37 km away
- 2.3202 km SE of Akutan, Alaska · 2178 days ago · 7 km deep · 98 km away
- 2.8212 km SSE of Akutan, Alaska · 2175 days ago · 10 km deep · 67 km away
- 4.7156 km SSE of Akutan, Alaska · 2167 days ago · 10 km deep · 88 km away · felt by 1
- 3.3192 km SE of Nikolski, Alaska · 2149 days ago · 10 km deep · 88 km away
- 2.1106 km SE of Unalaska, Alaska · 2145 days ago · 9 km deep · 97 km away
- 3.1208 km SE of Nikolski, Alaska · 2136 days ago · 10 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000c7tk (also filed as ak020cjlizwy). Read Sun, Sep 27, 2026, 8:01 AM UTC.