M4.4 earthquake 199 km ESE of Attu Station, Alaska
A magnitude 4.4 earthquake struck 199 km ESE of Attu Station, Alaska on Sun, Jul 23, 1978, 12:24 PM GMT+12 (00:24 UTC), 61 km (38 mi) below the surface.
A larger quake followed: M5.4 253 km ESE of Attu Station, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb), light
- Local time
- UTC
- 1978-07-23 00:24:54 UTC
- Depth
- 61.0 km (37.9 mi), shallow
- Epicenter
- 52.008° N, 175.785° 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.
- Stations used
- 13
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000vps. Read Tue, Sep 22, 2026, 4:05 PM UTC.