M4.5 earthquake 174 km W of Adak, Alaska
A magnitude 4.5 earthquake struck 174 km W of Adak, Alaska on Thu, Mar 25, 1999, 4:48 AM HAST (14:48 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 120 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
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1999-03-25 14:48:21 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.831° N, 179.171° 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: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.090 km WSW of Adak, Alaska · 10054 days ago · 33 km deep · 90 km away
- 4.3144 km WNW of Adak, Alaska · 10052 days ago · 166 km deep · 67 km away
- 4.6129 km WSW of Adak, Alaska · 10048 days ago · 33 km deep · 59 km away
- 4.2200 km WSW of Adak, Alaska · 10027 days ago · 33 km deep · 90 km away
- 4.8120 km WSW of Adak, Alaska · 9997 days ago · 33 km deep · 63 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000955p. Read Mon, Oct 5, 2026, 2:33 PM UTC.