M3.6 earthquake 31 km ESE of Whittier, Alaska
A magnitude 3.6 earthquake struck 31 km ESE of Whittier, Alaska on Sun, Dec 21, 1975, 9:09 AM GMT-10 (19:09 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M3.7 43 km ESE of Chenega, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.6 (ml), minor
- Local time
- UTC
- 1975-12-21 19:09:47 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 60.656° N, 148.171° 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.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 0 in the 30 days before it.
After
- 3.743 km ESE of Chenega, Alaska · 18537 days ago · 33 km deep · 95 km away
- 2.628 km E of Knik River, Alaska · 18511 days ago · 28 km deep · 87 km away
- 3.527 km W of Tatitlek, Alaska · 18499 days ago · 71 km deep · 58 km away
- 5.211 km SSE of Lowell Point, Alaska · 18492 days ago · 35 km deep · 99 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000e08. Read Tue, Sep 22, 2026, 10:54 AM UTC.