M2.4 earthquake 28km WSW of Tecopa, CA
A magnitude 2.4 earthquake struck 28km WSW of Tecopa, CA on Sun, Jul 23, 1978, 10:56 AM PDT (17:56 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M2.7 34km S of Tecopa, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.4 (Mh), micro
- Magnitude from
- Southern California Seismic Network
- Local time
- UTC
- 1978-07-23 17:56:10 UTC
- Depth
- 6.0 km (3.7 mi), shallow
- Epicenter
- 35.777° N, 116.518° 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 4.1 km horizontally, 31.6 km in depth
- Magnitude uncertainty
- ±0.89
- Depth from
- Operator assigned
- Station coverage gap
- 294°, poorly surrounded by stations
- Stations used
- 3
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 4 in the 30 days before it.
After
- 2.120km NW of Searles Valley, CA · 17594 days ago · 12 km deep · 95 km away
- 2.734km S of Tecopa, CA · 17565 days ago · 0 km deep · 33 km away
- 1.937km SSE of Fort Irwin, CA · 17561 days ago · 1 km deep · 94 km away
- 2.022km ENE of Barstow, CA · 17556 days ago · 6 km deep · 96 km away
- 2.622km ENE of Barstow, CA · 17556 days ago · 6 km deep · 96 km away
- 1.923km E of Barstow, CA · 17552 days ago · 2 km deep · 98 km away
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci9679298. Read Sun, Oct 4, 2026, 6:51 AM UTC.