Alaska earthquakes

M3.9 earthquake 172 km SSE of Unalaska, Alaska

A magnitude 3.9 earthquake struck 172 km SSE of Unalaska, Alaska on Mon, Sep 3, 2018, 10:13 AM AKDT (18:13 UTC), 10 km (6 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
3.9 (mb), minor
Local time
UTC
2018-09-03 18:13:27 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
52.472° N, 165.417° 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 9.8 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
175°
Stations used
66

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 22 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.8south of the Aleutian Islands · 2949 days ago · 10 km deep · 28 km away
  2. 2.1200 km SSE of Unalaska, Alaska · 2947 days ago · 5 km deep · 30 km away
  3. 2.1123 km SSE of Akutan, Alaska · 2942 days ago · 22 km deep · 86 km away
  4. 1.7109 km SSE of Unalaska, Alaska · 2934 days ago · 23 km deep · 66 km away
  5. 1.8158 km ESE of Nikolski, Alaska · 2933 days ago · 25 km deep · 100 km away
  6. 1.9174 km SSE of Unalaska, Alaska · 2933 days ago · 23 km deep · 25 km away
  7. 2.1175 km SSE of Unalaska, Alaska · 2929 days ago · 13 km deep · 12 km away
  8. 3.2121 km SSE of Akutan, Alaska · 2921 days ago · 29 km deep · 90 km away
  9. 3.7102 km SSE of Akutan, Alaska · 2915 days ago · 34 km deep · 89 km away
  10. 2.1112 km SSE of Akutan, Alaska · 2911 days ago · 7 km deep · 90 km away
  11. 3.2123 km SSE of Akutan, Alaska · 2910 days ago · 20 km deep · 87 km away
  12. 2.4122 km SSE of Akutan, Alaska · 2910 days ago · 41 km deep · 93 km away
  13. 2.1135 km SSE of Akutan, Alaska · 2909 days ago · 20 km deep · 88 km away
  14. 1.8115 km SE of Unalaska, Alaska · 2909 days ago · 8 km deep · 61 km away
  15. 1.990 km SSE of Akutan, Alaska · 2906 days ago · 11 km deep · 98 km away
  16. 3.3199 km SSE of Unalaska, Alaska · 2905 days ago · 25 km deep · 27 km away
  17. 1.874 km SSE of Unalaska, Alaska · 2904 days ago · 22 km deep · 98 km away
  18. 3.2115 km SSE of Akutan, Alaska · 2896 days ago · 35 km deep · 93 km away
  19. 2.399 km SSE of Akutan, Alaska · 2893 days ago · 39 km deep · 95 km away
  20. 3.5146 km ESE of Nikolski, Alaska · 2892 days ago · 24 km deep · 99 km away
  21. 2.3150 km ESE of Nikolski, Alaska · 2892 days ago · 18 km deep · 96 km away
  22. 2.3183 km SSE of Unalaska, Alaska · 2892 days ago · 34 km deep · 15 km away

Before

  1. 2.1152 km SSE of Akutan, Alaska · 2950 days ago · 39 km deep · 63 km away
  2. 3.8198 km SSE of Unalaska, Alaska · 2952 days ago · 10 km deep · 52 km away
  3. 1.9147 km ESE of Nikolski, Alaska · 2957 days ago · 17 km deep · 93 km away
  4. 2.0147 km S of Unalaska, Alaska · 2961 days ago · 18 km deep · 83 km away
  5. 1.991 km SSE of Unalaska, Alaska · 2974 days ago · 13 km deep · 86 km away
  6. 2.291 km SE of Unalaska, Alaska · 2978 days ago · 10 km deep · 91 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000h78p (also filed as ak018bb500ty). Read Wed, Sep 30, 2026, 7:25 PM UTC.