Alaska earthquakes

M4.3 earthquake 178 km WSW of Adak, Alaska

A magnitude 4.3 earthquake struck 178 km WSW of Adak, Alaska on Tue, May 23, 1978, 11:25 PM GMT-10 (09:25 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.4 196 km WSW of Adak, 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
4.3 (mb), light
Local time
UTC
1978-05-24 09:25:46 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.383° N, 179.081° 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
Stations used
13

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 4.2199 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 22 km away
  2. 5.4196 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 30 km away
  3. 4.1201 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 24 km away
  4. 3.9174 km W of Adak, Alaska · 17653 days ago · 33 km deep · 38 km away
  5. 4.8198 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 24 km away
  6. 4.2201 km WSW of Adak, Alaska · 17652 days ago · 33 km deep · 30 km away
  7. 4.5197 km WSW of Adak, Alaska · 17652 days ago · 33 km deep · 22 km away
  8. 5.9194 km W of Adak, Alaska · 17624 days ago · 33 km deep · 34 km away
  9. 4.6173 km WSW of Adak, Alaska · 17622 days ago · 66 km deep · 15 km away
  10. 4.9176 km WSW of Adak, Alaska · 17608 days ago · 67 km deep · 15 km away
  11. 4.4156 km WSW of Adak, Alaska · 17604 days ago · 56 km deep · 29 km away
  12. 3.9159 km WSW of Adak, Alaska · 17596 days ago · 68 km deep · 42 km away
  13. 4.9124 km WSW of Adak, Alaska · 17594 days ago · 54 km deep · 55 km away

Before

  1. 4.8191 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 21 km away
  2. 3.9173 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 29 km away
  3. 4.5185 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 10 km away
  4. 4.3176 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 23 km away
  5. 4.2196 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 21 km away
  6. 4.9194 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 18 km away
  7. 4.5206 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 33 km away
  8. 4.5199 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 27 km away
  9. 5.0187 km WSW of Adak, Alaska · 17653 days ago · 33 km deep · 27 km away
  10. 6.7192 km WSW of Adak, Alaska · 17653 days ago · 25 km deep · 19 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000uqe. Read Tue, Sep 22, 2026, 8:07 AM UTC.