M4.5 earthquake 50 km WNW of Ninilchik, Alaska
A magnitude 4.5 earthquake struck 50 km WNW of Ninilchik, Alaska on Mon, Sep 19, 1977, 1:18 PM GMT-9 (22:18 UTC), 104 km (65 mi) below the surface.
A larger quake followed: M4.6 41 km WNW of Anchor Point, 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
- 1977-09-19 22:18:24 UTC
- Depth
- 104.0 km (64.6 mi), intermediate-depth
- Epicenter
- 60.193° N, 152.530° 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
- 47
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.478 km WNW of Ninilchik, Alaska · 17893 days ago · 137 km deep · 30 km away
- 3.431 km W of Happy Valley, Alaska · 17877 days ago · 115 km deep · 28 km away
- 4.641 km WNW of Anchor Point, Alaska · 17873 days ago · 82 km deep · 35 km away
Before
- 4.858 km WNW of Anchor Point, Alaska · 17900 days ago · 116 km deep · 36 km away
- 3.540 km WNW of Clam Gulch, Alaska · 17901 days ago · 100 km deep · 32 km away
- 4.896 km W of Tyonek, Alaska · 17902 days ago · 150 km deep · 96 km away
- 3.963 km ENE of Pedro Bay, Alaska · 17929 days ago · 144 km deep · 37 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000qqu. Read Tue, Sep 22, 2026, 9:14 AM UTC.