M4.5 earthquake 88 km SSE of Adak, Alaska
A magnitude 4.5 earthquake struck 88 km SSE of Adak, Alaska on Fri, Aug 28, 1998, 1:12 AM HADT (10:12 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 31 km SW 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
- 1998-08-28 10:12:31 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.135° N, 176.145° 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: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.172 km SSE of Adak, Alaska · 10261 days ago · 33 km deep · 17 km away
- 4.731 km SW of Adak, Alaska · 10216 days ago · 58 km deep · 80 km away
- 4.342 km S of Adak, Alaska · 10215 days ago · 67 km deep · 56 km away
- 4.523 km W of Adak, Alaska · 10208 days ago · 60 km deep · 98 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008u01. Read Fri, Oct 2, 2026, 1:55 PM UTC.