M3.4 earthquake 46 km S of Old Harbor, Alaska
A magnitude 3.4 earthquake struck 46 km S of Old Harbor, Alaska on Wed, Oct 17, 1973, 1:38 AM GMT-9 (10:38 UTC), 100 km (62 mi) below the surface.
A larger quake followed: M4.1 30 km NNE of Akhiok, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.4 (mb), minor
- Local time
- UTC
- 1973-10-17 10:38:36 UTC
- Depth
- 100.0 km (62.1 mi), intermediate-depth
- Epicenter
- 56.787° N, 153.234° 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
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.130 km NNE of Akhiok, Alaska · 19314 days ago · 44 km deep · 59 km away
- 4.371 km S of Chiniak, Alaska · 19281 days ago · 48 km deep · 67 km away
- 4.382 km SSE of Chiniak, Alaska · 19280 days ago · 47 km deep · 88 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003uw. Read Tue, Sep 22, 2026, 11:14 AM UTC.