M4.5 earthquake 86 km SSE of Chiniak, Alaska
A magnitude 4.5 earthquake struck 86 km SSE of Chiniak, Alaska on Wed, Jun 18, 1975, 10:15 AM GMT-9 (19:15 UTC), 30 km (19 mi) below the surface.
A larger quake followed: M4.9 92 km SE of Old Harbor, 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
- 1975-06-18 19:15:41 UTC
- Depth
- 30.0 km (18.6 mi), shallow
- Epicenter
- 56.868° N, 151.853° 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
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.944 km SSE of Old Harbor, Alaska · 18697 days ago · 21 km deep · 74 km away
- 4.992 km SE of Old Harbor, Alaska · 18686 days ago · 33 km deep · 34 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000bnc. Read Tue, Sep 29, 2026, 7:14 AM UTC.