Public Safety
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Earthquake Early Warning Tested in San Diego County

| 4:16 PM

At 11 a.m. Thursday, cellphones across San Diego County started sounding off with a loud tone used for emergency alerts. It was part of a test of the California Earthquake Early Warning System, also known as ShakeAlert.

Public Safety
Photo of an iPhone with an Emergency Alert text.

County to Use Wireless Emergency Alert to Test Earthquake Warning

| 10:00 AM

The San Diego County Office of Emergency Services together with the California Governor’s Office of Emergency Services and the United States Geological Survey will be conducting a test at 11 a.m. on June 27 using the Wireless Emergency Alert system. The test will affect all mobile phones in the county area and will evaluate if the system could be effectively used for the California Earthquake Early Warning, also called a ShakeAlert.

Public Safety
Credit: FEMA

National Wireless Emergency Alert System Test Set for Oct. 3

| 10:50 AM

No reason to become alarmed. Your mobile phone will emit a special tone and vibrate as it receives an emergency test message on Sept. 20 update rescheduled to Oct 3. It is part of a nationwide test by the Federal Emergency Management Agency of Wireless Emergency Alerts systems to assess its effectiveness.