M4.6 earthquake 195 km WSW of Adak, Alaska
A magnitude 4.6 earthquake struck 195 km WSW of Adak, Alaska on Wed, Sep 18, 1985, 11:34 PM HADT (08:34 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 284 km WSW of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1985-09-19 08:34:53 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.500° N, 179.400° 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 1.6 and up: 2 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.8284 km WSW of Adak, Alaska · 14943 days ago · 33 km deep · 89 km away
- 5.1290 km WSW of Adak, Alaska · 14934 days ago · 33 km deep · 94 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002jw9. Read Tue, Sep 22, 2026, 5:34 AM UTC.