M4.5 earthquake 103 km SSE of Old Harbor, Alaska
A magnitude 4.5 earthquake struck 103 km SSE of Old Harbor, Alaska on Fri, Mar 3, 1978, 8:48 AM GMT-10 (18:48 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M4.6 111 km SSE 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
- 1978-03-03 18:48:36 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 56.319° N, 152.801° 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
- 37
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.6111 km SSE of Old Harbor, Alaska · 17734 days ago · 20 km deep · 8 km away
- 6.694 km SSE of Old Harbor, Alaska · 17695 days ago · 14 km deep · 13 km away
- 5.239 km SE of Akhiok, Alaska · 17695 days ago · 23 km deep · 69 km away
- 4.791 km SSE of Old Harbor, Alaska · 17695 days ago · 33 km deep · 26 km away
- 4.776 km SSE of Old Harbor, Alaska · 17695 days ago · 16 km deep · 36 km away
- 4.6105 km SSE of Old Harbor, Alaska · 17695 days ago · 15 km deep · 15 km away
- 5.193 km SSE of Old Harbor, Alaska · 17695 days ago · 24 km deep · 21 km away
- 4.6103 km SSE of Old Harbor, Alaska · 17695 days ago · 19 km deep · 17 km away
- 5.175 km SSE of Old Harbor, Alaska · 17695 days ago · 27 km deep · 29 km away
- 3.5172 km SSE of Old Harbor, Alaska · 17695 days ago · 33 km deep · 75 km away
- 4.5134 km SSE of Old Harbor, Alaska · 17694 days ago · 33 km deep · 42 km away
- 4.397 km SSE of Old Harbor, Alaska · 17692 days ago · 33 km deep · 6 km away
- 4.968 km SSE of Old Harbor, Alaska · 17691 days ago · 24 km deep · 38 km away
- 4.596 km SSE of Old Harbor, Alaska · 17689 days ago · 33 km deep · 7 km away
- 4.7Kodiak Island region, Alaska · 17685 days ago · 33 km deep · 18 km away
- 4.778 km SSE of Old Harbor, Alaska · 17680 days ago · 33 km deep · 29 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000t7f. Read Tue, Sep 22, 2026, 5:35 AM UTC.