Alaska earthquakes

M4.9 earthquake 113 km WSW of Adak, Alaska

A magnitude 4.9 earthquake struck 113 km WSW of Adak, Alaska on Wed, Oct 8, 1997, 5:48 PM HADT (02:48 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.4 99 km WSW of Adak, 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
4.9 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-10-09 02:48:03 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.493° N, 178.163° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

Felt (IV) on Adak.

From the USGS event page for usp00088s7. U.S. Geological Survey text and figures are in the public domain.

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 1.9 and up: 16 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.587 km SW of Adak, Alaska · 10583 days ago · 33 km deep · 35 km away
  2. 4.6136 km WSW of Adak, Alaska · 10581 days ago · 33 km deep · 23 km away
  3. 6.499 km WSW of Adak, Alaska · 10579 days ago · 22 km deep · 21 km away
  4. 4.7107 km SW of Adak, Alaska · 10577 days ago · 33 km deep · 31 km away
  5. 4.1106 km W of Adak, Alaska · 10574 days ago · 110 km deep · 59 km away
  6. 4.483 km SSW of Adak, Alaska · 10562 days ago · 33 km deep · 72 km away
  7. 4.1156 km WSW of Adak, Alaska · 10557 days ago · 33 km deep · 43 km away
  8. 4.4146 km WSW of Adak, Alaska · 10554 days ago · 33 km deep · 33 km away
  9. 4.7117 km WSW of Adak, Alaska · 10553 days ago · 33 km deep · 5 km away
  10. 4.990 km WSW of Adak, Alaska · 10549 days ago · 33 km deep · 31 km away
  11. 4.5127 km WSW of Adak, Alaska · 10540 days ago · 33 km deep · 27 km away
  12. 4.7194 km WSW of Adak, Alaska · 10539 days ago · 33 km deep · 81 km away
  13. 4.2137 km SW of Adak, Alaska · 10539 days ago · 33 km deep · 34 km away
  14. 3.9190 km W of Adak, Alaska · 10536 days ago · 33 km deep · 84 km away
  15. 4.3152 km SW of Adak, Alaska · 10531 days ago · 33 km deep · 50 km away
  16. 4.7172 km WSW of Adak, Alaska · 10528 days ago · 33 km deep · 60 km away

Before

  1. 5.6212 km WSW of Adak, Alaska · 10605 days ago · 33 km deep · 99 km away
  2. 4.271 km SSW of Adak, Alaska · 10608 days ago · 33 km deep · 89 km away
  3. 4.9Andreanof Islands, Aleutian Islands, Alaska · 10609 days ago · 53 km deep · 16 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00088s7. Read Thu, Oct 1, 2026, 4:19 PM UTC.