Alaska earthquakes

M5.0 earthquake 201 km WSW of Adak, Alaska

A magnitude 5.0 earthquake struck 201 km WSW of Adak, Alaska on Sat, Feb 22, 1975, 2:16 PM GMT-11 (01:16 UTC), 55 km (34 mi) below the surface.

A larger quake followed: M5.4 211 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
5.0 (mb, body-wave), moderate
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1975-02-23 01:16:14 UTC
Depth
55.0 km (34.2 mi), shallow
Epicenter
51.347° N, 179.417° 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.

Stations used
70

Nearby

Within 100 km, magnitude 2.0 and up: 8 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 5.0194 km WSW of Adak, Alaska · 18851 days ago · 50 km deep · 13 km away
  2. 4.4192 km W of Adak, Alaska · 18850 days ago · 59 km deep · 34 km away
  3. 4.7186 km WSW of Adak, Alaska · 18849 days ago · 59 km deep · 15 km away
  4. 4.3205 km WSW of Adak, Alaska · 18826 days ago · 63 km deep · 38 km away
  5. 4.9218 km WSW of Adak, Alaska · 18826 days ago · 53 km deep · 17 km away
  6. 5.4211 km WSW of Adak, Alaska · 18826 days ago · 57 km deep · 10 km away
  7. 4.1224 km WSW of Adak, Alaska · 18825 days ago · 56 km deep · 24 km away
  8. 4.9117 km WSW of Adak, Alaska · 18812 days ago · 62 km deep · 84 km away

Before

  1. 5.1197 km WSW of Adak, Alaska · 18851 days ago · 62 km deep · 6 km away
  2. 4.8205 km WSW of Adak, Alaska · 18851 days ago · 46 km deep · 8 km away
  3. 4.2213 km WSW of Adak, Alaska · 18851 days ago · 47 km deep · 20 km away
  4. 4.3211 km WSW of Adak, Alaska · 18852 days ago · 52 km deep · 10 km away
  5. 6.5200 km WSW of Adak, Alaska · 18852 days ago · 48 km deep · 3 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000a07. Read Sun, Oct 4, 2026, 1:12 AM UTC.