Alaska earthquakes

M4.2 earthquake 65 km SSW of Atka, Alaska

A magnitude 4.2 earthquake struck 65 km SSW of Atka, Alaska on Sun, Jul 5, 1987, 5:32 PM HADT (02:32 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.2 91 km SSW of Atka, Alaska. This one was a foreshock.

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.2 (mb), light
Local time
UTC
1987-07-06 02:32:06 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.667° N, 174.611° 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 9 in the 30 days before it.

After

  1. 5.291 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 29 km away
  2. 5.083 km SSW of Atka, Alaska · 14330 days ago · 33 km deep · 23 km away
  3. 4.644 km SW of Atka, Alaska · 14330 days ago · 33 km deep · 28 km away
  4. 5.183 km SSW of Atka, Alaska · 14330 days ago · 33 km deep · 18 km away
  5. 4.377 km WNW of Atka, Alaska · 14294 days ago · 33 km deep · 94 km away
  6. 4.786 km SSW of Atka, Alaska · 14281 days ago · 33 km deep · 23 km away
  7. 4.660 km SSW of Atka, Alaska · 14278 days ago · 33 km deep · 5 km away
  8. 4.569 km SE of Adak, Alaska · 14275 days ago · 33 km deep · 97 km away
  9. 4.8110 km ESE of Adak, Alaska · 14274 days ago · 33 km deep · 58 km away

Before

  1. 4.3159 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 96 km away
  2. 5.154 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 11 km away
  3. 5.984 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 19 km away
  4. 5.685 km SSW of Atka, Alaska · 14331 days ago · 33 km deep · 20 km away
  5. 5.388 km SSW of Atka, Alaska · 14332 days ago · 33 km deep · 23 km away
  6. 4.689 km SSE of Atka, Alaska · 14346 days ago · 33 km deep · 65 km away
  7. 4.975 km SW of Atka, Alaska · 14358 days ago · 33 km deep · 18 km away
  8. 5.095 km SSW of Atka, Alaska · 14360 days ago · 33 km deep · 35 km away
  9. 4.879 km S of Atka, Alaska · 14360 days ago · 33 km deep · 23 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00036cs. Read Tue, Sep 29, 2026, 7:36 PM UTC.