Magnitude-4.2 Earthquake Strikes Southern California Following 4.1 Quake

No immediate reports of injuries or significant damage; USGS warns of potential for larger quake in coming days.

A magnitude-4.2 earthquake struck near Lytle Creek in Southern California on January 6, following a magnitude 4.1 earthquake in the same area on January 5.
The earthquakes occurred near the intersection of the San Jacinto fault and the San Andreas fault.
There have been no immediate reports of injuries or significant infrastructure damage from either earthquake.
The USGS has cautioned that there is a one-in-20 chance of a larger earthquake occurring in the next few days.
Earthquake warning system ShakeAlert initially estimated the magnitude above 4.5, so alerts were sent to cellphones.