A map of the quake site. Photo credit: @USGS_ShakeAlert

An earthquake struck three miles west of Palomar Observatory on Sunday morning, according to the U.S. Geological Survey.

The 4.0-magnitude quake hit about 18 miles northeast of Escondido at 9:46 a.m., the agency said. The earthquake had a depth of eight miles.

Reports on the USGS “Did You Feel It?” map showed light shaking could be felt from Oceanside to Chula Vista, as well as Indio in Riverside County.

There were no immediate reports of damage or injuries.