Overview
- USGS set the mainshock at magnitude 4.9 late Monday near Indio Hills at a shallow depth of about 1.9 miles after initial readings of 5.1 and 4.6 were revised.
- More than 200 aftershocks have been recorded since, including a magnitude 3.8 late Tuesday morning and a magnitude 4.2 just after 12:30 a.m. Wednesday.
- No injuries or structural damage have been reported by local authorities, and officials say roads, utilities and water systems remain stable.
- California’s ShakeAlert system delivered warnings to many residents, though timing varied by distance from the epicenter, and some people felt shaking before receiving alerts.
- Scientists note the activity is close to the San Andreas and nearby faults such as Blue Cut, and they advise continued preparedness as aftershocks are expected in the days ahead.