Alaska earthquakes

M4.8 earthquake 134 km S of Unalaska, Alaska

A magnitude 4.8 earthquake struck 134 km S of Unalaska, Alaska on Sun, Sep 12, 1982, 12:28 AM GMT-9 (09:28 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.1 102 km SSW of Unalaska, 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
4.8 (mb), light
Local time
UTC
1982-09-12 09:28:14 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
52.685° N, 166.885° 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.

Depth from
OPERATOR_ASSIGNED

Nearest places

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

Nearby

Within 100 km, magnitude 1.8 and up: 16 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 5.1102 km SSW of Unalaska, Alaska · 16081 days ago · 33 km deep · 40 km away
  2. 4.8162 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 45 km away
  3. 4.7120 km SSW of Unalaska, Alaska · 16081 days ago · 33 km deep · 17 km away
  4. 4.5152 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 32 km away
  5. 4.7157 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 42 km away
  6. 5.2138 km S of Unalaska, Alaska · 16081 days ago · 33 km deep · 5 km away
  7. 4.5148 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 22 km away
  8. 5.5122 km SSW of Unalaska, Alaska · 16081 days ago · 33 km deep · 19 km away
  9. 4.6151 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 29 km away
  10. 4.6155 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 35 km away
  11. 4.8136 km ESE of Nikolski, Alaska · 16080 days ago · 33 km deep · 11 km away
  12. 4.7129 km SSW of Unalaska, Alaska · 16080 days ago · 33 km deep · 6 km away
  13. 5.0107 km SSW of Unalaska, Alaska · 16077 days ago · 33 km deep · 31 km away
  14. 4.7Fox Islands, Aleutian Islands, Alaska · 16075 days ago · 33 km deep · 65 km away
  15. 4.8133 km ESE of Nikolski, Alaska · 16073 days ago · 33 km deep · 3 km away
  16. 4.5123 km SSW of Unalaska, Alaska · 16072 days ago · 33 km deep · 14 km away

Before

  1. 5.9133 km ESE of Nikolski, Alaska · 16081 days ago · 33 km deep · 6 km away
  2. 4.8136 km ESE of Nikolski, Alaska · 16090 days ago · 33 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001pj6. Read Tue, Sep 22, 2026, 8:37 AM UTC.