M4.5 earthquake 46 km NE of Pedro Bay, Alaska
A magnitude 4.5 earthquake struck 46 km NE of Pedro Bay, Alaska on Mon, Apr 24, 1978, 9:36 PM GMT-10 (07:36 UTC), 171 km (106 mi) below the surface.
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
- 1978-04-25 07:36:06 UTC
- Depth
- 171.0 km (106.3 mi), intermediate-depth
- Epicenter
- 60.053° N, 153.461° 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
- 28
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 4 in the 30 days before it.
After
Before
- 4.18 km NW of Happy Valley, Alaska · 17686 days ago · 92 km deep · 91 km away
- 4.643 km E of Port Alsworth, Alaska · 17688 days ago · 158 km deep · 10 km away
- 3.947 km WNW of Nanwalek, Alaska · 17691 days ago · 87 km deep · 74 km away
- 4.556 km WNW of Ninilchik, Alaska · 17708 days ago · 128 km deep · 60 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000u8x. Read Tue, Sep 22, 2026, 12:16 PM UTC.