UPDATE at 11:06 a.m.: The USGS is reporting a series of earthquakes struck the region Monday morning.
The largest temblor measured a magnitude-4.7 and rattled Anza and the surrounding Coachella Valley, parts of Riverside, San Diego and Los Angeles counties today, but there were no immediate reports of any damage or injuries.
The quake hit around 9:55 a.m. and was centered 12 east-southeast of Anza, about 14 miles southwest of La Quinta and 16 south-southwest of Palm Desert, according to the U.S. Geological Survey.
The temblor was followed by a series of smaller aftershocks shortly after 10 a.m., according to the USGS, as well as a quake that preceded today's larger event: a magnitude-2.5 that struck near Pine Valley in East County San Diego at around 9:36 a.m.
Riverside County sheriff's Cpl. Angel Ramos said deputies received several alarm calls from residences and businesses, but no injuries were reported. No power outages were reported, according to Southern California Edison.
The larger quake was initially reported as a magnitude-5.2, but was repeatedly downgraded as more accurate measurements became available.
UPDATE at 10:22 a.m.: The USGS has reported a series of earthquakes Monday morning shook Southwest Riverside County.
At press time, six quakes have hit the area.
The rocking began at 9:36 a.m. when a 2.7-magnitude temblor shook near Anza, according to the U.S. Geological Society.
That was followed by two separate magnitude-4.7 earthquakes at approximately 9:55 a.m. that struck in the same area, about 12 miles southeast of Anza, according to the USGS.
The USGS is also reporting a magnitude-4.6 quake hit just southwest of La Quinta at 9:56 a.m., and a separate magnitude 3.0-temblor struck the same area at 9:58 a.m.
A magnitude-2.5 also rocked Pine Valley in East County San Diego at 10:11 a.m.
It is not clear yet if there is damage from these quakes.
UPDATE at 10:11 a.m.: The USGS has downgraded the quake to a magnitude 4.7.
ORIGINAL POST: A magnitude-5.2 earthquake shook Southwest Riverside County Monday morning.
The quake, centered 12 miles southeast of Anza, struck at 9:55 a.m., according to the U.S. Geological Society.
The temblor follows a 2.9-magnitude quake that rocked the same area Monday at 9:36 a.m., the USGS reported.
More updates to follow.