Alaska earthquakes

M5.0 earthquake 97 km S of Adak, Alaska

A magnitude 5.0 earthquake struck 97 km S of Adak, Alaska on Tue, Jun 30, 1987, 10:45 AM HADT (19:45 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
5.0 (mb), moderate
Local time
UTC
1987-06-30 19:45:18 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.007° N, 176.434° 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 2.0 and up: 2 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 4.583 km S of Adak, Alaska · 14329 days ago · 33 km deep · 15 km away
  2. 4.1110 km SSE of Adak, Alaska · 14307 days ago · 33 km deep · 33 km away

Before

  1. 4.784 km S of Adak, Alaska · 14329 days ago · 33 km deep · 13 km away
  2. 4.588 km S of Adak, Alaska · 14329 days ago · 33 km deep · 9 km away
  3. 4.0100 km S of Adak, Alaska · 14329 days ago · 33 km deep · 4 km away
  4. 4.588 km S of Adak, Alaska · 14335 days ago · 33 km deep · 11 km away
  5. 4.986 km S of Adak, Alaska · 14336 days ago · 33 km deep · 14 km away
  6. 4.386 km SSE of Adak, Alaska · 14344 days ago · 33 km deep · 31 km away
  7. 5.036 km SE of Adak, Alaska · 14358 days ago · 58 km deep · 74 km away
  8. 4.982 km SW of Adak, Alaska · 14358 days ago · 33 km deep · 80 km away
  9. 5.570 km WSW of Adak, Alaska · 14358 days ago · 33 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000367j. Read Tue, Sep 22, 2026, 11:11 AM UTC.