Alaska earthquakes

M3.4 earthquake 134 km SSE of Chignik, Alaska

A magnitude 3.4 earthquake struck 134 km SSE of Chignik, Alaska on Sat, Mar 3, 2018, 6:20 AM AKST (15:20 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.9 54 km SSE of Chignik, 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
3.4 (ML, local (Richter)), minor
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-03-03 15:20:00 UTC
Depth
2.7 km (1.7 mi), shallow
Epicenter
55.287° N, 157.214° 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
3.4ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
3.4ML, local (Richter)USGS National Earthquake Information CenterReviewed

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
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.

How well it is located

Reviewed by a seismologist.

Stations used
75

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 3.954 km SSE of Chignik, Alaska · 3134 days ago · 45 km deep · 82 km away
  2. 3.6136 km SE of Chignik, Alaska · 3134 days ago · 37 km deep · 9 km away
  3. 3.8113 km SE of Chignik, Alaska · 3132 days ago · 24 km deep · 28 km away
  4. 3.4103 km ESE of Chignik, Alaska · 3125 days ago · 11 km deep · 61 km away
  5. 2.279 km ESE of Chignik, Alaska · 3125 days ago · 17 km deep · 70 km away
  6. 2.787 km ESE of Chignik, Alaska · 3125 days ago · 7 km deep · 66 km away
  7. 2.5112 km SE of Chignik, Alaska · 3123 days ago · 7 km deep · 29 km away
  8. 2.4130 km SE of Chignik, Alaska · 3121 days ago · 14 km deep · 16 km away
  9. 2.144 km SE of Perryville, Alaska · 3114 days ago · 45 km deep · 97 km away
  10. 2.453 km SSE of Chignik, Alaska · 3114 days ago · 45 km deep · 83 km away
  11. 2.646 km SE of Chignik, Alaska · 3113 days ago · 56 km deep · 89 km away
  12. 2.564 km SSE of Chignik, Alaska · 3111 days ago · 64 km deep · 73 km away
  13. 2.8202 km SE of Perryville, Alaska · 3110 days ago · 29 km deep · 73 km away
  14. 2.1186 km SSE of Perryville, Alaska · 3108 days ago · 24 km deep · 100 km away
  15. 1.966 km ESE of Chignik, Alaska · 3107 days ago · 49 km deep · 93 km away
  16. 2.7130 km SSE of Perryville, Alaska · 3104 days ago · 11 km deep · 82 km away
  17. 2.3140 km ESE of Chignik, Alaska · 3102 days ago · 59 km deep · 61 km away
  18. 2.6118 km SSE of Chignik, Alaska · 3089 days ago · 25 km deep · 17 km away
  19. 2.477 km SSE of Chignik, Alaska · 3084 days ago · 14 km deep · 57 km away
  20. 2.8121 km SE of Chignik, Alaska · 3077 days ago · 24 km deep · 28 km away

Before

  1. 3.8130 km SSE of Chignik, Alaska · 3135 days ago · 26 km deep · 5 km away
  2. 3.251 km SSE of Perryville, Alaska · 3136 days ago · 5 km deep · 100 km away
  3. 2.839 km SSE of Chignik, Alaska · 3138 days ago · 45 km deep · 95 km away
  4. 3.0119 km SE of Chignik, Alaska · 3138 days ago · 27 km deep · 16 km away
  5. 3.4206 km SE of Perryville, Alaska · 3142 days ago · 9 km deep · 78 km away
  6. 3.3134 km SSE of Chignik, Alaska · 3143 days ago · 34 km deep · 3 km away
  7. 3.6134 km SSE of Chignik, Alaska · 3143 days ago · 20 km deep · 7 km away
  8. 4.4132 km SSE of Chignik, Alaska · 3143 days ago · 20 km deep · 6 km away
  9. 2.2118 km SSE of Perryville, Alaska · 3147 days ago · 36 km deep · 95 km away
  10. 2.838 km SE of Chignik, Alaska · 3151 days ago · 39 km deep · 99 km away
  11. 3.0186 km ESE of Chignik, Alaska · 3159 days ago · 12 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0182usdb1f (also filed as ak18579040, us2000dbps). Read Fri, Oct 2, 2026, 7:08 AM UTC.