M4.0 earthquake 5 km W of Glenbrook, Nevada
A magnitude 4.0 earthquake struck 5 km W of Glenbrook, Nevada on Tue, Feb 1, 1977, 10:47 AM PST (18:47 UTC), 7 km (5 mi) below the surface.
A larger quake followed: M4.8 17 km E of Walker, California. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (ml), light
- Local time
- UTC
- 1977-02-01 18:47:58 UTC
- Depth
- 7.3 km (4.5 mi), shallow
- Epicenter
- 39.092° N, 120.007° W
- Region
- California
- 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.
- Location uncertainty
- About 0.7 km horizontally, 3.2 km in depth
- Depth from
- From location
- Station coverage gap
- 69°
- Stations used
- 17
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.817 km E of Walker, California · 18109 days ago · 3 km deep · 92 km away
- 2.16 km W of Plumas Eureka (historical), California · 18072 days ago · 7 km deep · 100 km away
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event nc1033677 (also filed as usp0000meg). Read Tue, Sep 22, 2026, 7:25 AM UTC.