Alaska earthquakes

M4.5 earthquake 83 km S of Adak, Alaska

A magnitude 4.5 earthquake struck 83 km S of Adak, Alaska on Tue, Jun 30, 1987, 2:22 PM HADT (23:22 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
1987-06-30 23:22:04 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.130° N, 176.532° 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: 1 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 4.1110 km SSE of Adak, Alaska · 14307 days ago · 33 km deep · 43 km away

Before

  1. 5.097 km S of Adak, Alaska · 14328 days ago · 33 km deep · 15 km away
  2. 4.784 km S of Adak, Alaska · 14328 days ago · 33 km deep · 5 km away
  3. 4.588 km S of Adak, Alaska · 14329 days ago · 33 km deep · 8 km away
  4. 4.0100 km S of Adak, Alaska · 14329 days ago · 33 km deep · 17 km away
  5. 4.588 km S of Adak, Alaska · 14335 days ago · 33 km deep · 6 km away
  6. 4.986 km S of Adak, Alaska · 14335 days ago · 33 km deep · 4 km away
  7. 4.386 km SSE of Adak, Alaska · 14344 days ago · 33 km deep · 32 km away
  8. 5.036 km SE of Adak, Alaska · 14358 days ago · 58 km deep · 62 km away
  9. 4.982 km SW of Adak, Alaska · 14358 days ago · 33 km deep · 68 km away
  10. 5.570 km WSW of Adak, Alaska · 14358 days ago · 33 km deep · 82 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000367p. Read Tue, Sep 22, 2026, 6:29 AM UTC.