M4.7 earthquake 71 km WNW of Ninilchik, Alaska
A magnitude 4.7 earthquake struck 71 km WNW of Ninilchik, Alaska on Thu, Aug 18, 1983, 7:59 PM GMT-9 (04:59 UTC), 114 km (71 mi) below the surface.
A larger quake followed: M4.8 65 km WNW of Ninilchik, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1983-08-19 04:59:30 UTC
- Depth
- 113.7 km (70.6 mi), intermediate-depth
- Epicenter
- 60.195° N, 152.913° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.061 km WNW of Anchor Point, Alaska · 15714 days ago · 185 km deep · 25 km away
- 4.865 km WNW of Ninilchik, Alaska · 15706 days ago · 127 km deep · 19 km away
- 3.314 km NW of Anchor Point, Alaska · 15705 days ago · 33 km deep · 62 km away
- 4.621 km W of Anchor Point, Alaska · 15685 days ago · 81 km deep · 61 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001xs8. Read Tue, Sep 22, 2026, 10:04 AM UTC.