Alaska earthquakes

M3.1 earthquake 264 km SW of Adak, Alaska

A magnitude 3.1 earthquake struck 264 km SW of Adak, Alaska on Sat, Sep 9, 2023, 9:16 AM GMT-12 (21:16 UTC), 10 km (6 mi) below the surface.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-09-09 21:16:39 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
49.924° N, 178.778° 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.ScaleComputed byNotes
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 22 stations
2.9ML, local (Richter)Alaska Earthquake CenterPreliminary

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 5.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
256°, poorly surrounded by stations
Stations used
20

Nearby

Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 3.0244 km SW of Adak, Alaska · 1081 days ago · 10 km deep · 20 km away
  2. 2.4180 km SW of Adak, Alaska · 1079 days ago · 10 km deep · 84 km away
  3. 3.0268 km SW of Adak, Alaska · 1079 days ago · 10 km deep · 51 km away
  4. 2.4222 km SSW of Adak, Alaska · 1074 days ago · 11 km deep · 49 km away
  5. 2.4231 km SSW of Adak, Alaska · 1074 days ago · 12 km deep · 64 km away

Before

  1. 2.7274 km SW of Adak, Alaska · 1135 days ago · 10 km deep · 77 km away
  2. 1.9190 km SW of Adak, Alaska · 1136 days ago · 5 km deep · 74 km away
  3. 2.4244 km SSW of Adak, Alaska · 1141 days ago · 10 km deep · 38 km away
  4. 2.1195 km SSW of Adak, Alaska · 1141 days ago · 1 km deep · 78 km away
  5. 2.5Rat Islands, Aleutian Islands, Alaska · 1145 days ago · 10 km deep · 92 km away
  6. 3.0274 km SW of Adak, Alaska · 1146 days ago · 10 km deep · 17 km away
  7. 2.6280 km SW of Adak, Alaska · 1149 days ago · 10 km deep · 17 km away
  8. 2.5241 km SSW of Adak, Alaska · 1150 days ago · 10 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kxim (also filed as ak023bl412rj). Read Sat, Oct 3, 2026, 1:48 PM UTC.