M3.9 earthquake 137 km N of Atka, Alaska
A magnitude 3.9 earthquake struck 137 km N of Atka, Alaska on Sun, Mar 26, 2017, 11:35 AM HADT (20:35 UTC), 177 km (110 mi) below the surface.
A larger quake followed: M4.3 69 km NNW of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-03-26 20:35:34 UTC
- Depth
- 176.7 km (109.8 mi), intermediate-depth
- Epicenter
- 53.414° N, 173.905° 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 |
|---|---|---|---|
| 3.9 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.124 · 17 stations |
| 3.3 | 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 9.3 km horizontally, 8.5 km in depth
- Magnitude uncertainty
- ±0.12
- 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
- 4.369 km NNW of Atka, Alaska · 3474 days ago · 195 km deep · 88 km away
- 3.6Andreanof Islands, Aleutian Islands, Alaska · 3447 days ago · 168 km deep · 77 km away
- 2.3101 km NNW of Atka, Alaska · 3420 days ago · 158 km deep · 81 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10008deu (also filed as ak15649623, ak0173wwsqtk). Read Fri, Oct 2, 2026, 9:14 PM UTC.