M3.0 earthquake 30km WSW of Tecopa, CA
A magnitude 3.0 earthquake struck 30km WSW of Tecopa, CA on Fri, Apr 13, 1973, 12:45 AM PST (08:45 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M3.0 12km NE of Trona, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (Mh), micro
- Magnitude from
- Southern California Seismic Network
- Local time
- UTC
- 1973-04-13 08:45:31 UTC
- Depth
- 6.0 km (3.7 mi), shallow
- Epicenter
- 35.730° N, 116.529° W
- Region
- California
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 2.97 | Mh | Southern California Seismic Network | Preferred · Final · ±0.171 · 10 stations |
| 3.0 | ML, local (Richter) | USGS National Earthquake Information Center | Reviewed |
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 2.1 km horizontally, 31.6 km in depth
- Magnitude uncertainty
- ±0.17
- Depth from
- Operator assigned
- Station coverage gap
- 250°, poorly surrounded by stations
- Stations used
- 6
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci3320056 (also filed as usp00001cu). Read Thu, Oct 1, 2026, 12:23 PM UTC.