SAN FRANCISCO—An earthquake struck the Bay Area in on Tuesday, September 13 that was felt by residents across the region.

The 3.5 magnitude earthquake had an estimated 2.8 mile depth hit at 12:40 a.m. on Tuesday and was centered approximately two miles east-southeast of Piedmont on the Hayward Fault. The Hayward Fault runs from San Pablo Bay in the north to Fremont in the south and passes through Berkeley, Oakland, Hayward and Fremont, according to the United States Geological Survey (USGS).

Hayward fault earthquake "felt report."
Hayward fault earthquake “felt report.”

There were no reported problems or threats associated with the quake, according to law enforcement officials. Residents reported being shaken awake in San Francisco, Oakland, Berkley, Alameda and San Leandro from the earthquake.

#Piedmont began trending on Twitter as several people throughout the Bay Area reported feeling the tremor on social media.

The USGS has advised San Francisco residents to expect aftershocks hours, days, or even weeks after the main quake – adding that, “aftershocks can cause building damage and falling debris that could injure you.”