M4.1 earthquake 92 km SSW of Adak, Alaska
A magnitude 4.1 earthquake struck 92 km SSW of Adak, Alaska on Thu, Feb 20, 1997, 12:48 AM HAST (10:48 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.5 115 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
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1997-02-20 10:48:43 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.057° N, 176.905° 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: 8 in the 60 days after this one and 3 in the 30 days before it.
After
- 3.083 km SE of Adak, Alaska · 10803 days ago · 33 km deep · 96 km away
- 4.8107 km WSW of Adak, Alaska · 10799 days ago · 56 km deep · 90 km away
- 4.242 km W of Adak, Alaska · 10798 days ago · 64 km deep · 87 km away
- 4.456 km SSW of Adak, Alaska · 10795 days ago · 33 km deep · 37 km away
- 4.8112 km WSW of Adak, Alaska · 10782 days ago · 33 km deep · 85 km away
- 5.5115 km WSW of Adak, Alaska · 10777 days ago · 33 km deep · 90 km away
- 4.348 km SSE of Adak, Alaska · 10761 days ago · 33 km deep · 62 km away
- 4.129 km S of Adak, Alaska · 10756 days ago · 64 km deep · 64 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0007xhp. Read Thu, Oct 1, 2026, 11:03 PM UTC.