M4.1 earthquake 49 km WNW of Nanwalek, Alaska
A magnitude 4.1 earthquake struck 49 km WNW of Nanwalek, Alaska on Sat, Jul 15, 1978, 3:21 AM GMT-9 (12:21 UTC), 103 km (64 mi) below the surface.
A larger quake followed: M5.4 33 km ENE of Pedro Bay, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1978-07-15 12:21:13 UTC
- Depth
- 103.0 km (64.0 mi), intermediate-depth
- Epicenter
- 59.589° N, 152.669° 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
- 40
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.446 km E of Port Alsworth, Alaska · 17583 days ago · 184 km deep · 84 km away
- 5.433 km ENE of Pedro Bay, Alaska · 17578 days ago · 123 km deep · 58 km away
- 4.351 km ENE of Pedro Bay, Alaska · 17577 days ago · 136 km deep · 54 km away
- 4.239 km E of Pedro Bay, Alaska · 17564 days ago · 139 km deep · 45 km away
- 3.743 km SW of Nanwalek, Alaska · 17564 days ago · 77 km deep · 53 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000vkb. Read Sat, Oct 3, 2026, 1:36 PM UTC.