It has been an active start to the week for San Bernardino County fault lines. The region was hit with two 3.5 magnitude earthquakes within a 10-hour period according to the U.S. Geological Survey.
On Tuesday morning one quake was centered in the Mojave Desert, 40 miles east of Barstow, and on Monday evening another was recorded 60 miles to the southwest near Morongo Valley. It was felt in Big Bear Lake and Palm Springs.
These are some of the largest seismic events since a 3.9 earthquake was recorded near the Salton Sea in late October.