3.8-magnitude earthquake rattles thousands near San Francisco, geologists say

Thousands were rattled by a 3.8-magnitude earthquake Wednesday morning, geologists said.

The earthquake shook San Ramon, California, at about 11:43 a.m. on Nov. 17, according to the U.S. Geological Survey.

People in San Francisco and across the Bay Area could feel light shaking from the 6.8-mile deep earthquake, according to USGS.

More than 3,500 people reported feeling the earthquake to the agency. Many people also shared feeling the earthquake on social media.

At least a dozen earthquakes ranging from 1.3 to 3.0 have been reported in the area since the first quake, according to USGS.

Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says. It replaces the old Richter scale.

Quakes between 2.5 and 5.4 magnitude are often felt but rarely cause much damage, according to Michigan Tech.