Here's why the ShakeAlert app, meant to warn residents of nearby earthquakes, didn’t alert Southern Californians when the state was struck by a magnitude 7.1 earthquake #EarthquakeLA pic.twitter.com/QJUvRfryrN

— Bloomberg Originals (@bbgoriginals) July 7, 2019

Dodger Stadium swayed. Disneyland rides were evacuated. Southern California, already on edge, was rattled by two powerful earthquakes in two days. https://t.co/q7Bh6XfQMX

— The New York Times (@nytimes) July 6, 2019