M4.7 earthquake 105 km SSW of False Pass, Alaska
A magnitude 4.7 earthquake struck 105 km SSW of False Pass, Alaska on Sat, Oct 17, 1987, 10:51 AM AKDT (18:51 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.0 139 km S of False Pass, 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
- 1987-10-17 18:51:29 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.992° N, 164.072° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.0139 km S of False Pass, Alaska · 14190 days ago · 33 km deep · 64 km away
- 4.971 km SE of Akutan, Alaska · 14178 days ago · 33 km deep · 74 km away
- 4.9133 km S of False Pass, Alaska · 14171 days ago · 33 km deep · 52 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00039bw. Read Tue, Sep 22, 2026, 3:41 PM UTC.