An earthquake with a preliminary magnitude of 4.7 struck Baja California on Tuesday, prompting reports of shaking from residents on both sides of the U.S.–Mexico border.

According to the U.S. Geological Survey, the epicenter was approximately 5.6 miles north of Delta, Mexico, at a depth of about 10 miles. Reports submitted to the agency’s “Did You Feel It?” service came from Baja California, Southern California and Arizona, with many originating in Yuma.

Baja California Governor Marina del Pilar said authorities had received no damage reports at the time of her statement. She urged residents to remain calm, prepare for possible aftershocks, and follow updates through official channels

The governor cited an initial estimate from CICESE that placed the earthquake’s magnitude at 5.1 and its epicenter roughly four kilometers northwest of the Nuevo León ejido. That preliminary assessment differed from the USGS figure.

In its aftershock forecast, the USGS estimated a 66% probability of another earthquake measuring magnitude 3.0 or higher within the following week.

The quake also activated the USGS ShakeAlert system, sending notifications to some cellphone users in California.

Officials reminded residents that they can get emergency assistance by calling 911.