ShakeReadySD is the County of San Diego’s Earthquake Early Warning application, powered by ShakeAlert®. ShakeAlert® quickly detects the first waves of a significant earthquake in order for ShakeReadySD to alert you seconds before the shaking starts. These alerts are meant to warn you that shaking is expected at your specific location, so that you can take the right actions quickly to protect yourself.

ShakeReadySD is now available in English and Spanish within the no-cost SD Emergency App. Download the SD Emergency app and ShakeReadySD today at:



Frequently Asked Questions


ShakeReadySD Post-Alert Messages