California earthquakes

M2.1 earthquake 25km S of Tecopa, CA

A magnitude 2.1 earthquake struck 25km S of Tecopa, CA on Mon, Dec 1, 1986, 3:31 AM PST (11:31 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.9 11km ESE of Trona, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.1 (Mc), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1986-12-01 11:31:26 UTC
Depth
5.2 km (3.2 mi), shallow
Epicenter
35.627° N, 116.239° W
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
Station coverage gap
216°, poorly surrounded by stations
Stations used
0

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 6 in the 30 days before it.

After

  1. 2.538km SSE of Fort Irwin, CA · 14536 days ago · 5 km deep · 82 km away
  2. 2.518km ENE of Barstow, CA · 14534 days ago · 5 km deep · 93 km away
  3. 2.911km ESE of Trona, CA · 14526 days ago · 5 km deep · 94 km away
  4. 2.030km SW of Tecopa, CA · 14515 days ago · 5 km deep · 21 km away
  5. 2.39km ENE of Barstow, CA · 14501 days ago · 5 km deep · 100 km away
  6. 2.537km ENE of Johannesburg, CA · 14498 days ago · 9 km deep · 92 km away

Before

  1. 2.427km S of Tecopa, CA · 14550 days ago · 5 km deep · 2 km away
  2. 2.125km S of Tecopa, CA · 14551 days ago · 5 km deep · 1 km away
  3. 2.117km NE of Barstow, CA · 14570 days ago · 5 km deep · 91 km away
  4. 1.817km NE of Barstow, CA · 14570 days ago · 7 km deep · 91 km away
  5. 2.111km ENE of Barstow, CA · 14574 days ago · 4 km deep · 98 km away
  6. 2.528km SE of Trona, CA · 14577 days ago · 5 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci713860. Read Fri, Oct 2, 2026, 2:23 PM UTC.