M3.1 earthquake 200 km S of Nikolski, Alaska
A magnitude 3.1 earthquake struck 200 km S of Nikolski, Alaska on Mon, Mar 27, 2017, 6:26 PM AKDT (02:26 UTC), 22 km (14 mi) below the surface.
A larger quake followed: M4.3 187 km S 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
- 3.1 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-03-28 02:26:20 UTC
- Depth
- 21.9 km (13.6 mi), shallow
- Epicenter
- 51.145° N, 169.070° 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 |
|---|---|---|---|
| 3.1 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed |
| 3.1 | 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 6.6 km horizontally, 9.3 km in depth
- Stations used
- 16
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 6 in the 30 days before it.
After
Before
- 3.7144 km SSW of Nikolski, Alaska · 3481 days ago · 27 km deep · 87 km away
- 2.5204 km SSE of Nikolski, Alaska · 3488 days ago · 25 km deep · 90 km away
- 2.9165 km SSW of Nikolski, Alaska · 3499 days ago · 33 km deep · 99 km away
- 2.7126 km SSW of Nikolski, Alaska · 3504 days ago · 27 km deep · 95 km away
- 3.1122 km SSW of Nikolski, Alaska · 3506 days ago · 27 km deep · 86 km away
- 3.4125 km SSW of Nikolski, Alaska · 3506 days ago · 10 km deep · 87 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10008dpe (also filed as ak15653464, ak0173zx3odx). Read Sun, Oct 4, 2026, 2:31 PM UTC.