M5.4 earthquake 174 km WNW of Adak, Alaska
A magnitude 5.4 earthquake struck 174 km WNW of Adak, Alaska on Sat, Mar 23, 1985, 11:35 AM HAST (21:35 UTC), 233 km (145 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.4 (mw), moderate
- Local time
- UTC
- 1985-03-23 21:35:12 UTC
- Depth
- 233.2 km (144.9 mi), intermediate-depth
- Epicenter
- 52.624° N, 178.872° 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 2.4 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002d5d (also filed as gcmtb032385c, gcmt19850323213513, iscgem530867). Read Mon, Sep 21, 2026, 7:48 PM UTC.