Join @ReadySanDiego and @USGS_ShakeAlert live on Facebook to learn about a new earthquake early warning feature in the SD Emergency app. https://t.co/PHzXRNQjWc via @SanDiegoCountyMore
Join @ReadySanDiego and @USGS_ShakeAlert live on Facebook to learn about a new earthquake early warning feature in the SD Emergency app. https://t.co/PHzXRNQjWc via @SanDiegoCountyMore