Alaska earthquakes

M5.0 earthquake 83 km SSW of Atka, Alaska

A magnitude 5.0 earthquake struck 83 km SSW of Atka, Alaska on Mon, Jul 6, 1987, 7:44 AM HADT (16:44 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.1 83 km SSW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
5.0 (mb), moderate
Local time
UTC
1987-07-06 16:44:47 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.468° N, 174.509° 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: 6 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 4.644 km SW of Atka, Alaska · 14330 days ago · 33 km deep · 51 km away
  2. 5.183 km SSW of Atka, Alaska · 14330 days ago · 33 km deep · 16 km away
  3. 4.793 km SE of Atka, Alaska · 14305 days ago · 33 km deep · 100 km away
  4. 4.786 km SSW of Atka, Alaska · 14281 days ago · 33 km deep · 6 km away
  5. 4.660 km SSW of Atka, Alaska · 14278 days ago · 33 km deep · 25 km away
  6. 4.8110 km ESE of Adak, Alaska · 14274 days ago · 33 km deep · 55 km away

Before

  1. 5.291 km SSW of Atka, Alaska · 14330 days ago · 33 km deep · 8 km away
  2. 4.265 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 23 km away
  3. 4.3159 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 76 km away
  4. 5.154 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 33 km away
  5. 5.984 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 15 km away
  6. 5.685 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 11 km away
  7. 5.388 km SSW of Atka, Alaska · 14332 days ago · 33 km deep · 13 km away
  8. 4.689 km SSE of Atka, Alaska · 14346 days ago · 33 km deep · 53 km away
  9. 4.975 km SW of Atka, Alaska · 14358 days ago · 33 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00036dn. Read Tue, Sep 29, 2026, 4:00 PM UTC.