M4.7 earthquake 248 km W of Adak, Alaska
A magnitude 4.7 earthquake struck 248 km W of Adak, Alaska on Tue, Feb 19, 1974, 1:34 AM GMT+12 (13:34 UTC), 139 km (86 mi) below the surface.
A larger quake followed: M4.8 193 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
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1974-02-18 13:34:05 UTC
- Depth
- 139.0 km (86.4 mi), intermediate-depth
- Epicenter
- 51.772° N, 179.771° 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
- 32
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.8193 km WSW of Adak, Alaska · 19210 days ago · 56 km deep · 73 km away
- 4.7267 km W of Adak, Alaska · 19194 days ago · 168 km deep · 51 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00005ba. Read Sat, Oct 3, 2026, 1:38 PM UTC.