M4.2 earthquake 70 km WNW of Adak, Alaska
A magnitude 4.2 earthquake struck 70 km WNW of Adak, Alaska on Fri, Sep 11, 1998, 1:29 PM HADT (22:29 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
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1998-09-11 22:29:40 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.138° N, 177.563° 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 2 in the 30 days before it.
After
- 5.2116 km WSW of Adak, Alaska · 10239 days ago · 33 km deep · 87 km away
- 4.6154 km W of Adak, Alaska · 10239 days ago · 33 km deep · 97 km away
- 5.4Andreanof Islands, Aleutian Islands, Alaska · 10228 days ago · 33 km deep · 84 km away
- 4.6103 km WSW of Adak, Alaska · 10228 days ago · 33 km deep · 63 km away
- 4.731 km SW of Adak, Alaska · 10217 days ago · 58 km deep · 69 km away
- 4.342 km S of Adak, Alaska · 10215 days ago · 67 km deep · 93 km away
- 4.523 km W of Adak, Alaska · 10208 days ago · 60 km deep · 51 km away
- 5.241 km NE of Adak, Alaska · 10195 days ago · 35 km deep · 97 km away
- 4.324 km SW of Adak, Alaska · 10190 days ago · 58 km deep · 68 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008usx. Read Fri, Oct 2, 2026, 8:50 PM UTC.