(CNN)A 4.5 magnitude earthquake rocked California’s Bay Area on Monday.
No injuries or significant damage were immediately reported, but residents felt light tremors as far north as Chico more than 140 miles away, according to the USGS.
It was a relatively shallow quake, at just 8.7 miles below the surface, seismologist Lucy Jones tweeted. But it could mean there’s a heightened chance of a bigger quake over the next few days near the Calaveras Fault, a branch of the San Andreas Fault system, she said.
There’s a 36% chance of aftershocks measuring magnitude 3 or higher in the week following the quake, most likely near the epicenter, the USGS forecasts.