Alaska earthquakes

M4.7 earthquake 86 km SSE of Atka, Alaska

A magnitude 4.7 earthquake struck 86 km SSE of Atka, Alaska on Tue, Mar 24, 1987, 7:02 PM HAST (05:02 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.0 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.7 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1987-03-25 05:02:51 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.549° N, 173.514° 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 1.7 and up: 8 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.697 km SE of Atka, Alaska · 14432 days ago · 33 km deep · 18 km away
  2. 5.0Andreanof Islands, Aleutian Islands, Alaska · 14432 days ago · 33 km deep · 24 km away
  3. 4.754 km SE of Atka, Alaska · 14424 days ago · 33 km deep · 36 km away
  4. 4.764 km SE of Atka, Alaska · 14424 days ago · 33 km deep · 27 km away
  5. 4.894 km SSE of Atka, Alaska · 14424 days ago · 33 km deep · 12 km away
  6. 4.062 km SE of Atka, Alaska · 14424 days ago · 33 km deep · 26 km away
  7. 4.5179 km SSE of Atka, Alaska · 14424 days ago · 33 km deep · 94 km away
  8. 4.695 km ESE of Atka, Alaska · 14389 days ago · 33 km deep · 41 km away

Before

  1. 4.053 km SE of Atka, Alaska · 14439 days ago · 33 km deep · 41 km away
  2. 4.876 km SE of Atka, Alaska · 14439 days ago · 33 km deep · 15 km away
  3. 4.561 km SSE of Atka, Alaska · 14439 days ago · 33 km deep · 25 km away
  4. 4.675 km SE of Atka, Alaska · 14439 days ago · 33 km deep · 13 km away
  5. 6.279 km SSE of Atka, Alaska · 14439 days ago · 20 km deep · 6 km away
  6. 5.184 km SE of Atka, Alaska · 14447 days ago · 33 km deep · 7 km away
  7. 4.880 km S of Atka, Alaska · 14454 days ago · 33 km deep · 45 km away
  8. 5.094 km SSW of Atka, Alaska · 14465 days ago · 33 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00033m9. Read Fri, Oct 2, 2026, 9:43 AM UTC.