M4.8 earthquake 17 km E of Walker, California
A magnitude 4.8 earthquake struck 17 km E of Walker, California on Mon, Feb 21, 1977, 10:24 PM PST (06:24 UTC), 3 km (2 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (ml), light
- Local time
- UTC
- 1977-02-22 06:24:05 UTC
- Depth
- 2.9 km (1.8 mi), shallow
- Epicenter
- 38.490° N, 119.281° W
- Region
- California
- Strongest shaking
- V, moderate shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- V, moderate shaking
- Peak ground acceleration
- 14.8% of gravity
- Peak ground velocity
- 1.9 cm/s
- Map
- Automatic
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 0.6 km horizontally, 11.1 km in depth
- Depth from
- From location
- Station coverage gap
- 181°, poorly surrounded by stations
- Stations used
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event nc1034069 (also filed as ushis3432, usp0000mp1). Read Mon, Sep 28, 2026, 2:34 PM UTC.