M2.5 earthquake 73km SSE of San Clemente Is. (SE tip), CA
A magnitude 2.5 earthquake struck 73km SSE of San Clemente Is. (SE tip), CA on Thu, Oct 6, 1983, 10:38 PM PDT (05:38 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M3.3 33km WSW of Coronado, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.5 (mc), micro
- Local time
- UTC
- 1983-10-07 05:38:08 UTC
- Depth
- 5.8 km (3.6 mi), shallow
- Epicenter
- 32.261° N, 117.935° 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 3.7 km horizontally, 31.6 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 44°
- Stations used
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.658km W of Rosarito, B.C., MX · 15698 days ago · 6 km deep · 27 km away
- 1.82km NW of Bonita, CA · 15691 days ago · 5 km deep · 95 km away
- 3.333km WSW of Coronado, CA · 15690 days ago · 5 km deep · 53 km away
- 2.210km SW of La Jolla, CA · 15686 days ago · 5 km deep · 80 km away
- 3.16km SE of Rosarito, B.C., MX · 15681 days ago · 6 km deep · 89 km away
- 2.842km SW of Primo Tapia, B.C., MX · 15676 days ago · 6 km deep · 76 km away
- 1.838km WSW of Encinitas, CA · 15656 days ago · 5 km deep · 79 km away
- 2.546km SW of San Clemente, CA · 15648 days ago · 6 km deep · 92 km away
- 1.947km E of San Clemente Is. (SE tip), CA · 15646 days ago · 6 km deep · 64 km away
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci17543. Read Wed, Sep 30, 2026, 7:02 PM UTC.