M3.9 earthquake 265 km SSW of Adak, Alaska
A magnitude 3.9 earthquake struck 265 km SSW of Adak, Alaska on Mon, Mar 9, 2026, 9:13 PM HADT (06:13 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
- 3.9 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2026-03-10 06:13:00 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 49.881° N, 178.697° W
- Region
- Alaska
- Strongest shaking
- IV, light shaking
- 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 · ±0.069 · 55 stations |
| 4.2 | ML, local (Richter) | Alaska Earthquake Center | Reviewed · ±0.3 · 35 stations |
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Peak ground acceleration
- 3.2% of gravity
- Peak ground velocity
- 0.7 cm/s
- Map
- Automatic
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 7.0 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 221°, poorly surrounded by stations
- Stations used
- 77
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.9289 km SW of Adak, Alaska · 203 days ago · 25 km deep · 57 km away
- 3.1256 km SSW of Adak, Alaska · 189 days ago · 10 km deep · 83 km away
- 3.1290 km SW of Adak, Alaska · 148 days ago · 10 km deep · 95 km away
- 2.9234 km SW of Adak, Alaska · 147 days ago · 10 km deep · 33 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000s3e5 (also filed as aka2026evhtkj). Read Fri, Oct 2, 2026, 3:03 PM UTC.