Alaska earthquakes

M3.6 earthquake 157 km SE of Chignik, Alaska

A magnitude 3.6 earthquake struck 157 km SE of Chignik, Alaska on Sun, Feb 2, 2025, 12:21 PM AKST (21:21 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M4.7 134 km SSE of Perryville, Alaska. This one was a foreshock.

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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
3.6 (ML, local (Richter)), minor
Magnitude from
Alaska Earthquake Center
Local time
UTC
2025-02-02 21:21:20 UTC
Depth
16.8 km (10.4 mi), shallow
Epicenter
55.148° N, 156.933° W
Region
Alaska
Strongest shaking
I, not felt 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
3.6ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
3.7Mwr, regional momentUSGS National Earthquake Information CenterReviewed · ±0.058 · 29 stations

Shaking

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

Strongest estimated
I, not felt shaking
Peak ground acceleration
0.0% of gravity
Peak ground velocity
0.0 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Strike-slip
Moment magnitude
3.7 Mwr
Nodal plane 1
Strike 158°, dip 36°, rake 26°
Nodal plane 2
Strike 47°, dip 75°, rake 124°

How well it is located

Reviewed by a seismologist.

Stations used
67

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.3140 km SSE of Perryville, Alaska · 607 days ago · 14 km deep · 88 km away
  2. 4.7134 km SSE of Perryville, Alaska · 605 days ago · 12 km deep · 88 km away · felt by 7
  3. 2.065 km SSE of Chignik, Alaska · 595 days ago · 8 km deep · 94 km away
  4. 2.4175 km SE of Chignik, Alaska · 593 days ago · 13 km deep · 60 km away
  5. 2.679 km ESE of Chignik, Alaska · 593 days ago · 5 km deep · 90 km away
  6. 2.3105 km SE of Chignik, Alaska · 592 days ago · 4 km deep · 67 km away
  7. 1.864 km SE of Chignik, Alaska · 589 days ago · 24 km deep · 96 km away
  8. 2.5136 km SE of Chignik, Alaska · 588 days ago · 23 km deep · 31 km away
  9. 1.8149 km ESE of Chignik, Alaska · 587 days ago · 14 km deep · 96 km away
  10. 2.3170 km SE of Chignik, Alaska · 586 days ago · 25 km deep · 16 km away
  11. 2.8156 km ESE of Chignik, Alaska · 583 days ago · 17 km deep · 93 km away
  12. 2.3160 km SE of Chignik, Alaska · 581 days ago · 21 km deep · 16 km away
  13. 2.293 km SE of Chignik, Alaska · 576 days ago · 17 km deep · 64 km away
  14. 3.2196 km SE of Perryville, Alaska · 573 days ago · 2 km deep · 47 km away
  15. 2.0115 km SE of Perryville, Alaska · 566 days ago · 12 km deep · 48 km away
  16. 2.2107 km SSE of Chignik, Alaska · 561 days ago · 26 km deep · 50 km away
  17. 2.0116 km SE of Perryville, Alaska · 560 days ago · 10 km deep · 55 km away
  18. 3.4133 km SE of Perryville, Alaska · 553 days ago · 17 km deep · 56 km away

Before

  1. 2.8226 km SE of Perryville, Alaska · 611 days ago · 8 km deep · 100 km away
  2. 3.4110 km SE of Chignik, Alaska · 615 days ago · 5 km deep · 48 km away · felt by 1
  3. 2.9159 km SE of Chignik, Alaska · 624 days ago · 3 km deep · 16 km away
  4. 4.3165 km SE of Chignik, Alaska · 624 days ago · 7 km deep · 16 km away
  5. 3.3165 km ESE of Chignik, Alaska · 625 days ago · 22 km deep · 77 km away
  6. 2.7229 km SSE of Chignik, Alaska · 627 days ago · 12 km deep · 72 km away
  7. 3.0210 km SE of Perryville, Alaska · 631 days ago · 9 km deep · 61 km away
  8. 3.362 km SSE of Chignik, Alaska · 633 days ago · 30 km deep · 95 km away
  9. 3.587 km SE of Perryville, Alaska · 633 days ago · 32 km deep · 77 km away
  10. 2.6166 km SE of Chignik, Alaska · 634 days ago · 16 km deep · 16 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0251ixd3h0 (also filed as us7000pavn). Read Sat, Oct 3, 2026, 1:55 PM UTC.