Alaska earthquakes

M4.2 earthquake 286 km W of Adak, Alaska

A magnitude 4.2 earthquake struck 286 km W of Adak, Alaska on Thu, Oct 1, 2026, 7:10 AM GMT+12 (19:10 UTC), 119 km (74 mi) below the surface.

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Map

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

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The earthquake

Magnitude
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2026-09-30 19:10:09 UTC
Depth
119.2 km (74.1 mi), intermediate-depth
Epicenter
51.880° N, 179.212° E
Region
Alaska
Strongest shaking
II, weak 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.ScaleComputed byNotes
4.2mb, body-waveUSGS National Earthquake Information CenterPreferred · Preliminary · ±0.053 · 98 stations
4.3ML, local (Richter)Alaska Earthquake CenterPreliminary · ±0.1 · 19 stations

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
II, weak shaking
Peak ground acceleration
0.2% of gravity
Peak ground velocity
0.1 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS. If you felt it, tell the USGS: every report sharpens the shaking map.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 8.0 km horizontally, 5.9 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
37°
Stations used
121

Nearby

Within 100 km, magnitude 1.5 and up: 0 since this one and 53 in the 30 days before it.

Before

  1. 3.1Rat Islands, Aleutian Islands, Alaska · 3 days ago · 40 km deep · 62 km away
  2. 2.5292 km WSW of Adak, Alaska · 3 days ago · 30 km deep · 87 km away
  3. 2.0Rat Islands, Aleutian Islands, Alaska · 3 days ago · 186 km deep · 21 km away
  4. 2.4222 km W of Adak, Alaska · 4 days ago · 85 km deep · 71 km away
  5. 4.4259 km WSW of Adak, Alaska · 4 days ago · 18 km deep · 82 km away
  6. 4.4263 km WSW of Adak, Alaska · 5 days ago · 18 km deep · 89 km away
  7. 1.6263 km W of Adak, Alaska · 7 days ago · 7 km deep · 23 km away
  8. 2.7271 km WSW of Adak, Alaska · 8 days ago · 21 km deep · 53 km away
  9. 2.7Rat Islands, Aleutian Islands, Alaska · 9 days ago · 35 km deep · 78 km away
  10. 2.4197 km W of Adak, Alaska · 9 days ago · 13 km deep · 93 km away
  11. 2.4Rat Islands, Aleutian Islands, Alaska · 9 days ago · 30 km deep · 83 km away
  12. 2.4263 km W of Adak, Alaska · 10 days ago · 65 km deep · 50 km away
  13. 2.3258 km W of Adak, Alaska · 10 days ago · 172 km deep · 29 km away
  14. 2.3Rat Islands, Aleutian Islands, Alaska · 10 days ago · 147 km deep · 73 km away
  15. 2.3Rat Islands, Aleutian Islands, Alaska · 11 days ago · 65 km deep · 46 km away
  16. 2.7262 km WSW of Adak, Alaska · 11 days ago · 18 km deep · 97 km away
  17. 2.7Rat Islands, Aleutian Islands, Alaska · 11 days ago · 62 km deep · 59 km away
  18. 2.1259 km W of Adak, Alaska · 13 days ago · 99 km deep · 30 km away
  19. 3.3Rat Islands, Aleutian Islands, Alaska · 14 days ago · 53 km deep · 73 km away
  20. 2.4242 km W of Adak, Alaska · 14 days ago · 100 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000tyl5 (also filed as aka2026tjwhtq). Read Thu, Oct 1, 2026, 6:58 PM UTC.