M4.2 earthquake 239 km WSW of Adak, Alaska
A magnitude 4.2 earthquake struck 239 km WSW of Adak, Alaska on Sat, Jul 5, 1986, 3:15 PM GMT+12 (03:15 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 285 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
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1986-07-05 03:15:37 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.473° N, 179.964° E
- 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: 1 in the 60 days after this one and 3 in the 30 days before it.
After
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002vqm. Read Thu, Oct 1, 2026, 5:36 AM UTC.