M4.3 earthquake 31 km NW of Susitna, Alaska
A magnitude 4.3 earthquake struck 31 km NW of Susitna, Alaska on Mon, Sep 9, 1985, 2:53 PM AKDT (22:53 UTC), 78 km (48 mi) below the surface.
A larger quake followed: M5.1 31 km W of Petersville, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1985-09-09 22:53:48 UTC
- Depth
- 77.5 km (48.2 mi), intermediate-depth
- Epicenter
- 61.736° N, 150.953° 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 1.5 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.440 km NW of Beluga, Alaska · 14993 days ago · 98 km deep · 58 km away
- 3.117 km WSW of Anchorage, Alaska · 14981 days ago · 42 km deep · 75 km away
- 3.724 km SE of Skwentna, Alaska · 14954 days ago · 8 km deep · 12 km away
- 2.96 km SSE of Houston, Alaska · 14954 days ago · 40 km deep · 64 km away
- 3.710 km WSW of Trapper Creek, Alaska · 14950 days ago · 10 km deep · 66 km away
- 5.131 km W of Petersville, Alaska · 14938 days ago · 81 km deep · 91 km away
- 3.713 km E of Talkeetna, Alaska · 14937 days ago · 19 km deep · 85 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002jk4. Read Mon, Sep 28, 2026, 4:42 PM UTC.