SACRAMENTO – California’s Earthquake Early Warning System provided advance notification to millions of Southern Californians on Monday, April 14, 2025 before a 5.2 magnitude earthquake struck San Diego County.
The 10:08 am earthquake, near Julian in San Diego County, was felt across large portions of Southern California. The Governor’s Office of Emergency Services (Cal OES) coordinated closely with local officials in the impacted region to evaluate any issues or unmet needs.
Almost 700,000 phones in the affected area received notifications through the state’s MyShake app. Millions more received these notifications through wireless emergency alerts and Google alerts.
“Warning Californians before earthquakes strike can save lives,” said Cal OES Director Nancy Ward. “The MyShake app is doing what it is designed to do, and we encourage all Californians to download it today”.
Following the earthquake, there were more than 27,000 new downloads of the MyShake App.
Governor Newsom launched My Shake in 2019, the nation’s first statewide Earthquake Early Warning System.
Alerts delivered through MyShake are powered by ShakeAlert, an automated program operated by the United States Geological Survey (USGS) and other partners including Cal OES. Before shaking is felt, ShakeAlert rapidly analyzes data from seismic networks, and calculates a preliminary magnitude to estimate which areas will feel the earthquake.
The majority of smartphones with updated operating systems automatically receive earthquake alerts. Here are other ways to make sure you get Earthquake Early Warning alerts:
- Download the free MyShake App
- Ensure Wireless Emergency Alerts (WEAs) are enabled on your smartphone
To learn more about earthquake preparedness and download the MyShake app, visit: www.earthquake.ca.gov.