M4.7 earthquake 75 km SSW of Nikolski, Alaska
A magnitude 4.7 earthquake struck 75 km SSW of Nikolski, Alaska on Mon, Oct 19, 1987, 2:03 PM AKDT (22:03 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 139 km WSW of Nikolski, 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
- 1987-10-19 22:03:03 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.347° N, 169.403° 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: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.2139 km WSW of Nikolski, Alaska · 14210 days ago · 33 km deep · 90 km away
- 4.5137 km WSW of Nikolski, Alaska · 14176 days ago · 33 km deep · 89 km away
- 5.1171 km SW of Nikolski, Alaska · 14176 days ago · 33 km deep · 99 km away
- 4.6146 km SW of Nikolski, Alaska · 14175 days ago · 33 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00039e1. Read Tue, Sep 22, 2026, 10:29 PM UTC.