M3.6 earthquake 180 km WNW of Nikolski, Alaska
A magnitude 3.6 earthquake struck 180 km WNW of Nikolski, Alaska on Fri, Oct 2, 2020, 2:00 AM HADT (11:00 UTC), 253 km (157 mi) below the surface.
A larger quake followed: M3.7 152 km WNW of Nikolski, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.6 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2020-10-02 11:00:50 UTC
- Depth
- 253.3 km (157.4 mi), intermediate-depth
- Epicenter
- 53.807° N, 171.149° 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 |
|---|---|---|---|
| 3.6 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.288 · 3 stations |
| 3.2 | 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 12.6 km horizontally, 12.5 km in depth
- Magnitude uncertainty
- ±0.29
- Depth from
- From location
- Station coverage gap
- 100°
- Stations used
- 29
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.8206 km NW of Nikolski, Alaska · 2161 days ago · 10 km deep · 28 km away
- 3.7152 km WNW of Nikolski, Alaska · 2161 days ago · 139 km deep · 64 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000c6ph (also filed as ak020comvnxh). Read Sun, Oct 4, 2026, 12:44 PM UTC.