M2.7 earthquake 33km WSW of La Jolla, CA

A magnitude 2.7 earthquake struck 33km WSW of La Jolla, CA on Sun, Oct 24, 2021, 7:20 PM PDT (02:20 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M3.1 3km NW of Palomar Observatory, CA. This one was a foreshock.

Map

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

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
2.71	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.122 · 107 stations
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.053 · 46 stations

5 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 5 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ci39841463 (also filed as us6000fxb0). Read Sun, Oct 4, 2026, 3:12 PM UTC.