Alaska earthquakes

M4.2 earthquake 91 km W of Adak, Alaska

A magnitude 4.2 earthquake struck 91 km W of Adak, Alaska on Sun, Jul 21, 1996, 8:38 PM HADT (05:38 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
4.2 (mb), light
Local time
UTC
1996-07-22 05:38:32 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.821° N, 177.962° 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: 18 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 4.5121 km SW of Adak, Alaska · 11026 days ago · 33 km deep · 65 km away
  2. 5.138 km WSW of Adak, Alaska · 11025 days ago · 55 km deep · 59 km away
  3. 3.7145 km WSW of Adak, Alaska · 11010 days ago · 33 km deep · 60 km away
  4. 4.0145 km WSW of Adak, Alaska · 11009 days ago · 33 km deep · 57 km away
  5. 4.1134 km SW of Adak, Alaska · 11009 days ago · 33 km deep · 76 km away
  6. 4.2138 km WSW of Adak, Alaska · 11006 days ago · 33 km deep · 70 km away
  7. 6.0Andreanof Islands, Aleutian Islands, Alaska · 11000 days ago · 33 km deep · 50 km away
  8. 5.3129 km WSW of Adak, Alaska · 10999 days ago · 33 km deep · 48 km away
  9. 5.2126 km WSW of Adak, Alaska · 10998 days ago · 33 km deep · 55 km away
  10. 4.261 km SSW of Adak, Alaska · 10996 days ago · 33 km deep · 88 km away
  11. 4.595 km SW of Adak, Alaska · 10994 days ago · 33 km deep · 51 km away
  12. 5.138 km SW of Adak, Alaska · 10994 days ago · 33 km deep · 73 km away
  13. 4.552 km SSW of Adak, Alaska · 10992 days ago · 33 km deep · 86 km away
  14. 4.4127 km SW of Adak, Alaska · 10989 days ago · 33 km deep · 70 km away
  15. 4.3162 km WSW of Adak, Alaska · 10989 days ago · 33 km deep · 81 km away
  16. 5.5117 km WSW of Adak, Alaska · 10987 days ago · 44 km deep · 41 km away
  17. 5.1131 km WSW of Adak, Alaska · 10974 days ago · 33 km deep · 46 km away
  18. 4.3124 km SW of Adak, Alaska · 10968 days ago · 33 km deep · 93 km away

Before

  1. 3.8182 km W of Adak, Alaska · 11028 days ago · 33 km deep · 90 km away
  2. 4.7133 km WSW of Adak, Alaska · 11029 days ago · 33 km deep · 65 km away
  3. 5.181 km WSW of Adak, Alaska · 11031 days ago · 33 km deep · 39 km away
  4. 4.496 km SSW of Adak, Alaska · 11033 days ago · 33 km deep · 95 km away
  5. 4.074 km SW of Adak, Alaska · 11034 days ago · 33 km deep · 50 km away
  6. 4.3171 km WSW of Adak, Alaska · 11034 days ago · 33 km deep · 94 km away
  7. 5.2101 km SW of Adak, Alaska · 11036 days ago · 33 km deep · 52 km away
  8. 4.089 km SW of Adak, Alaska · 11037 days ago · 33 km deep · 49 km away
  9. 4.290 km WSW of Adak, Alaska · 11038 days ago · 33 km deep · 40 km away
  10. 4.762 km WSW of Adak, Alaska · 11040 days ago · 33 km deep · 39 km away
  11. 4.281 km SSW of Adak, Alaska · 11040 days ago · 33 km deep · 95 km away
  12. 3.690 km SSW of Adak, Alaska · 11040 days ago · 33 km deep · 85 km away
  13. 3.9117 km SW of Adak, Alaska · 11042 days ago · 33 km deep · 88 km away
  14. 4.096 km SW of Adak, Alaska · 11042 days ago · 33 km deep · 79 km away
  15. 4.549 km SSW of Adak, Alaska · 11045 days ago · 33 km deep · 80 km away
  16. 4.0101 km SSW of Adak, Alaska · 11047 days ago · 33 km deep · 91 km away
  17. 4.0105 km SW of Adak, Alaska · 11050 days ago · 33 km deep · 69 km away
  18. 5.047 km W of Adak, Alaska · 11050 days ago · 33 km deep · 44 km away
  19. 4.652 km WSW of Adak, Alaska · 11052 days ago · 33 km deep · 50 km away
  20. 4.644 km SSW of Adak, Alaska · 11052 days ago · 33 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007md5. Read Wed, Sep 30, 2026, 11:36 PM UTC.