Alaska earthquakes

M2.9 earthquake Alaska Peninsula

A magnitude 2.9 earthquake struck in the Alaska Peninsula on Thu, Sep 21, 2017, 10:38 PM AKDT (06:38 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M4.5 84 km ESE of Sand Point, Alaska. This one was a foreshock.

Sand Point forecastMore in Alaska

Map

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

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The earthquake

Magnitude
2.9 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2017-09-22 06:38:52 UTC
Depth
7.5 km (4.7 mi), shallow
Epicenter
55.416° N, 158.440° 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
2.9ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
2.9ML, local (Richter)USGS National Earthquake Information CenterReviewed

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used
62

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 25 in the 30 days before it.

After

  1. 2.142 km S of Perryville, Alaska · 3274 days ago · 52 km deep · 43 km away
  2. 2.251 km ESE of Perryville, Alaska · 3265 days ago · 41 km deep · 39 km away
  3. 2.170 km SE of Chignik, Alaska · 3258 days ago · 16 km deep · 77 km away
  4. 2.488 km SSE of Perryville, Alaska · 3257 days ago · 25 km deep · 21 km away
  5. 1.572 km SE of Sand Point, Alaska · 3256 days ago · 12 km deep · 94 km away
  6. 1.971 km SE of Perryville, Alaska · 3255 days ago · 28 km deep · 1 km away
  7. 1.617 km E of Perryville, Alaska · 3254 days ago · 69 km deep · 59 km away
  8. 2.723 km E of Chignik, Alaska · 3254 days ago · 63 km deep · 97 km away
  9. 2.572 km SE of Perryville, Alaska · 3254 days ago · 14 km deep · 2 km away
  10. 2.754 km SE of Sand Point, Alaska · 3253 days ago · 28 km deep · 97 km away
  11. 1.823 km ENE of Perryville, Alaska · 3252 days ago · 69 km deep · 66 km away
  12. 2.511 km WNW of Ivanof Bay, Alaska · 3247 days ago · 98 km deep · 96 km away
  13. 2.031 km S of Ivanof Bay, Alaska · 3246 days ago · 8 km deep · 66 km away
  14. 1.838 km SE of Perryville, Alaska · 3244 days ago · 47 km deep · 33 km away
  15. 1.752 km E of Sand Point, Alaska · 3244 days ago · 13 km deep · 78 km away
  16. 4.584 km ESE of Sand Point, Alaska · 3244 days ago · 32 km deep · 63 km away · felt by 2
  17. 2.5130 km SSE of Perryville, Alaska · 3243 days ago · 19 km deep · 63 km away

Before

  1. 1.87 km WSW of Ivanof Bay, Alaska · 3300 days ago · 102 km deep · 89 km away
  2. 3.034 km SSE of Perryville, Alaska · 3300 days ago · 46 km deep · 37 km away
  3. 1.925 km SE of Chignik, Alaska · 3305 days ago · 10 km deep · 86 km away
  4. 2.615 km E of Chignik, Alaska · 3306 days ago · 14 km deep · 98 km away
  5. 2.238 km SSW of Ivanof Bay, Alaska · 3306 days ago · 54 km deep · 77 km away
  6. 2.818 km SE of Perryville, Alaska · 3307 days ago · 56 km deep · 53 km away
  7. 4.1149 km SSE of Chignik, Alaska · 3307 days ago · 23 km deep · 89 km away
  8. 2.885 km SE of Sand Point, Alaska · 3308 days ago · 23 km deep · 96 km away
  9. 4.6147 km SE of Chignik, Alaska · 3308 days ago · 8 km deep · 90 km away
  10. 1.834 km SE of Chignik, Alaska · 3308 days ago · 8 km deep · 77 km away
  11. 2.335 km SE of Chignik, Alaska · 3309 days ago · 5 km deep · 79 km away
  12. 3.067 km SE of Perryville, Alaska · 3310 days ago · 25 km deep · 4 km away
  13. 2.357 km SE of Perryville, Alaska · 3310 days ago · 31 km deep · 22 km away
  14. 4.4149 km SSE of Chignik, Alaska · 3310 days ago · 37 km deep · 88 km away
  15. 2.375 km SE of Perryville, Alaska · 3311 days ago · 19 km deep · 14 km away
  16. 2.293 km SE of Chignik, Alaska · 3311 days ago · 22 km deep · 75 km away
  17. 2.198 km ESE of Sand Point, Alaska · 3312 days ago · 36 km deep · 64 km away
  18. 2.7104 km SE of Sand Point, Alaska · 3313 days ago · 21 km deep · 89 km away
  19. 2.265 km ESE of Sand Point, Alaska · 3313 days ago · 28 km deep · 72 km away
  20. 1.811 km NNE of Ivanof Bay, Alaska · 3314 days ago · 101 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017c6d7tpy (also filed as ak16876497, us2000avn0). Read Sat, Oct 3, 2026, 2:09 AM UTC.