Alaska earthquakes

M3.1 earthquake 271 km SW of Adak, Alaska

A magnitude 3.1 earthquake struck 271 km SW of Adak, Alaska on Fri, Aug 19, 2022, 6:27 AM GMT-12 (18:27 UTC), 36 km (23 mi) below the surface.

A larger quake followed: M4.6 210 km WSW of Adak, Alaska. This one was a foreshock.

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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), minor
Local time
UTC
2022-08-19 18:27:06 UTC
Depth
36.5 km (22.7 mi), shallow
Epicenter
50.077° N, 179.259° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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 9.5 km horizontally, 24.4 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
283°, poorly surrounded by stations
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.7262 km SW of Adak, Alaska · 1499 days ago · 10 km deep · 10 km away
  2. 3.4200 km SSW of Adak, Alaska · 1499 days ago · 40 km deep · 98 km away
  3. 3.0328 km SW of Adak, Alaska · 1497 days ago · 10 km deep · 81 km away
  4. 2.3290 km SW of Adak, Alaska · 1454 days ago · 31 km deep · 27 km away
  5. 4.6210 km WSW of Adak, Alaska · 1445 days ago · 10 km deep · 89 km away
  6. 3.9212 km WSW of Adak, Alaska · 1445 days ago · 10 km deep · 87 km away

Before

  1. 2.2296 km SW of Adak, Alaska · 1506 days ago · 22 km deep · 30 km away
  2. 2.6south of the Aleutian Islands · 1507 days ago · 16 km deep · 41 km away
  3. 2.5257 km SW of Adak, Alaska · 1511 days ago · 10 km deep · 32 km away
  4. 1.8261 km WSW of Adak, Alaska · 1514 days ago · 34 km deep · 94 km away
  5. 2.0260 km SSW of Adak, Alaska · 1514 days ago · 29 km deep · 45 km away
  6. 2.2257 km SSW of Adak, Alaska · 1520 days ago · 26 km deep · 73 km away
  7. 2.9Rat Islands, Aleutian Islands, Alaska · 1521 days ago · 35 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000iptw (also filed as ak022amc0ruw). Read Wed, Sep 30, 2026, 4:49 AM UTC.