Alaska earthquakes

M4.3 earthquake 86 km SSE of Adak, Alaska

A magnitude 4.3 earthquake struck 86 km SSE of Adak, Alaska on Mon, Jun 15, 1987, 9:54 AM HADT (18:54 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.9 86 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.3 (mb), light
Local time
UTC
1987-06-15 18:54:35 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.173° N, 176.083° 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: 9 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 4.986 km S of Adak, Alaska · 14335 days ago · 33 km deep · 35 km away
  2. 4.588 km S of Adak, Alaska · 14335 days ago · 33 km deep · 34 km away
  3. 4.0100 km S of Adak, Alaska · 14329 days ago · 33 km deep · 35 km away
  4. 4.588 km S of Adak, Alaska · 14329 days ago · 33 km deep · 26 km away
  5. 4.784 km S of Adak, Alaska · 14328 days ago · 33 km deep · 27 km away
  6. 5.097 km S of Adak, Alaska · 14328 days ago · 33 km deep · 31 km away
  7. 4.583 km S of Adak, Alaska · 14328 days ago · 33 km deep · 32 km away
  8. 4.3159 km SSW of Atka, Alaska · 14323 days ago · 33 km deep · 95 km away
  9. 4.1110 km SSE of Adak, Alaska · 14307 days ago · 33 km deep · 23 km away

Before

  1. 4.975 km SW of Atka, Alaska · 14350 days ago · 33 km deep · 100 km away
  2. 5.036 km SE of Adak, Alaska · 14358 days ago · 58 km deep · 55 km away
  3. 4.982 km SW of Adak, Alaska · 14358 days ago · 33 km deep · 97 km away
  4. 3.697 km SSE of Adak, Alaska · 14363 days ago · 33 km deep · 11 km away
  5. 4.397 km ESE of Adak, Alaska · 14364 days ago · 33 km deep · 68 km away
  6. 4.581 km SSE of Adak, Alaska · 14366 days ago · 33 km deep · 6 km away
  7. 4.774 km SSE of Adak, Alaska · 14367 days ago · 33 km deep · 15 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00035tt. Read Tue, Sep 22, 2026, 6:20 AM UTC.