M3.6 earthquake 169 km W of Adak, Alaska
A magnitude 3.6 earthquake struck 169 km W of Adak, Alaska on Sun, Mar 22, 1998, 4:11 PM HAST (02:11 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.0 140 km W 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
- 3.6 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1998-03-23 02:11:29 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.148° N, 179.068° 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 1.5 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008hvk. Read Fri, Oct 2, 2026, 4:04 AM UTC.