M3.5 earthquake 197 km SSW of Nikolski, Alaska
A magnitude 3.5 earthquake struck 197 km SSW of Nikolski, Alaska on Thu, Nov 18, 2021, 4:43 PM HAST (02:43 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.5 (ml), minor
- Local time
- UTC
- 2021-11-19 02:43:00 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 51.251° N, 169.755° 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 4.8 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 192°, poorly surrounded by stations
- Stations used
- 23
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.9240 km SSW of Nikolski, Alaska · 1769 days ago · 10 km deep · 45 km away
- 3.3165 km S of Nikolski, Alaska · 1757 days ago · 10 km deep · 86 km away
- 3.2117 km SSW of Nikolski, Alaska · 1745 days ago · 35 km deep · 81 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000fwqx. Read Wed, Sep 30, 2026, 5:28 AM UTC.