Alaska earthquakes

M3.8 earthquake 182 km W of Adak, Alaska

A magnitude 3.8 earthquake struck 182 km W of Adak, Alaska on Sun, Jul 21, 1996, 8:31 PM HADT (05:31 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.0 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
3.8 (mb), minor
Local time
UTC
1996-07-22 05:31:03 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.761° N, 179.268° 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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.291 km W of Adak, Alaska · 11027 days ago · 33 km deep · 90 km away
  2. 3.7206 km WSW of Adak, Alaska · 11027 days ago · 33 km deep · 45 km away
  3. 4.5197 km WSW of Adak, Alaska · 11022 days ago · 33 km deep · 71 km away
  4. 3.7145 km WSW of Adak, Alaska · 11008 days ago · 33 km deep · 54 km away
  5. 4.0145 km WSW of Adak, Alaska · 11008 days ago · 33 km deep · 47 km away
  6. 4.2138 km WSW of Adak, Alaska · 11005 days ago · 33 km deep · 85 km away
  7. 6.0Andreanof Islands, Aleutian Islands, Alaska · 10999 days ago · 33 km deep · 71 km away
  8. 5.3129 km WSW of Adak, Alaska · 10997 days ago · 33 km deep · 66 km away
  9. 5.2126 km WSW of Adak, Alaska · 10996 days ago · 33 km deep · 82 km away
  10. 4.3162 km WSW of Adak, Alaska · 10988 days ago · 33 km deep · 59 km away
  11. 5.5117 km WSW of Adak, Alaska · 10986 days ago · 44 km deep · 78 km away
  12. 5.1131 km WSW of Adak, Alaska · 10973 days ago · 33 km deep · 61 km away

Before

  1. 4.7133 km WSW of Adak, Alaska · 11028 days ago · 33 km deep · 86 km away
  2. 4.6259 km W of Adak, Alaska · 11030 days ago · 150 km deep · 85 km away
  3. 4.3171 km WSW of Adak, Alaska · 11033 days ago · 33 km deep · 70 km away
  4. 3.9139 km WSW of Adak, Alaska · 11052 days ago · 33 km deep · 58 km away
  5. 4.3147 km WSW of Adak, Alaska · 11055 days ago · 33 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007md4. Read Tue, Sep 29, 2026, 7:48 PM UTC.