M4.0 earthquake 88 km S of Adak, Alaska
A magnitude 4.0 earthquake struck 88 km S of Adak, Alaska on Thu, May 22, 1997, 9:02 PM HADT (06:02 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 52 km S 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
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1997-05-23 06:02:22 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.081° N, 176.671° 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: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.852 km S of Adak, Alaska · 10724 days ago · 44 km deep · 36 km away
- 4.089 km S of Adak, Alaska · 10719 days ago · 33 km deep · 15 km away
- 3.575 km ESE of Adak, Alaska · 10706 days ago · 33 km deep · 84 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00082r2. Read Thu, Oct 1, 2026, 10:02 PM UTC.