Phantom earthquake in San Jose
© twitter/Rakesh
South Bay residents felt some shaking Tuesday afternoon, however the exact cause is unknown.

The U.S. Geological Survey confirmed that what South Bay residents felt was not an earthquake.

"Our duty seismologist did an extensive search and we did not see any seismic activity in the South Bay," Susan Garcia, a spokeswoman with the U.S. Geological Survey, said to SFGATE. "So it's not an earthquake, whatever they're feeling — as far as we can tell."

Despite that, many local residents did report on Twitter that a rumbling of some sort was felt at about 2:45 p.m.



Late Tuesday night, a spokesman for PG&E said the utility company was not performing any work in the area that might cause shaking.

The most recent reported shaking in California from the USGS was an earthquake with a magnitude of 3.5 near Rio Dell at about 9:46 a.m. on Tuesday.