M4.5 earthquake 191 km WSW of Adak, Alaska
A magnitude 4.5 earthquake struck 191 km WSW of Adak, Alaska on Sun, Aug 26, 1973, 2:28 PM GMT-10 (00:28 UTC), 53 km (33 mi) below the surface.
A larger quake followed: M4.9 190 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
- 4.5 (mb), light
- Local time
- UTC
- 1973-08-27 00:28:21 UTC
- Depth
- 53.0 km (32.9 mi), shallow
- Epicenter
- 51.245° N, 179.211° 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.
- Stations used
- 11
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.6193 km WSW of Adak, Alaska · 19392 days ago · 51 km deep · 6 km away
- 4.5187 km WSW of Adak, Alaska · 19392 days ago · 62 km deep · 19 km away
- 4.5202 km WSW of Adak, Alaska · 19392 days ago · 60 km deep · 12 km away
- 4.9190 km WSW of Adak, Alaska · 19380 days ago · 54 km deep · 6 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000037w. Read Wed, Sep 30, 2026, 6:07 AM UTC.