M4.3 earthquake 131 km SW of Adak, Alaska
A magnitude 4.3 earthquake struck 131 km SW of Adak, Alaska on Mon, Aug 31, 1998, 9:53 PM HADT (06:53 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.4 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1998-09-01 06:53:51 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.187° N, 178.180° 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: 9 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.3178 km WSW of Adak, Alaska · 10245 days ago · 33 km deep · 73 km away
- 4.9182 km WSW of Adak, Alaska · 10245 days ago · 33 km deep · 64 km away
- 5.2116 km WSW of Adak, Alaska · 10239 days ago · 33 km deep · 30 km away
- 4.6154 km W of Adak, Alaska · 10239 days ago · 33 km deep · 83 km away
- 4.1130 km WSW of Adak, Alaska · 10229 days ago · 33 km deep · 11 km away
- 4.1146 km WSW of Adak, Alaska · 10228 days ago · 33 km deep · 32 km away
- 5.4Andreanof Islands, Aleutian Islands, Alaska · 10228 days ago · 33 km deep · 33 km away
- 4.6103 km WSW of Adak, Alaska · 10227 days ago · 33 km deep · 54 km away
- 4.7142 km WSW of Adak, Alaska · 10225 days ago · 52 km deep · 41 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008u76. Read Fri, Oct 2, 2026, 7:26 AM UTC.