Alaska earthquakes

M5.5 earthquake 229 km WSW of Adak, Alaska

A magnitude 5.5 earthquake struck 229 km WSW of Adak, Alaska on Wed, Feb 13, 1985, 7:58 AM HAST (17:58 UTC), 44 km (27 mi) below the surface.

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The earthquake

Magnitude
5.5 (mw), moderate
Local time
UTC
1985-02-13 17:58:27 UTC
Depth
44.2 km (27.5 mi), shallow
Epicenter
51.186° N, 179.753° 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.

Nearby

Within 100 km, magnitude 2.5 and up: 4 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 5.0219 km WSW of Adak, Alaska · 15193 days ago · 55 km deep · 10 km away
  2. 4.8187 km WSW of Adak, Alaska · 15168 days ago · 33 km deep · 42 km away
  3. 4.9273 km WSW of Adak, Alaska · 15159 days ago · 33 km deep · 48 km away
  4. 4.9191 km WSW of Adak, Alaska · 15157 days ago · 33 km deep · 39 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002bvj (also filed as gcmtb021385b, gcmt19850213175827, iscgem532203). Read Tue, Sep 22, 2026, 7:41 AM UTC.