MyShake, the earthquake early warning app, sent out a test alert at 3:19 a.m., waking up people across Southern California. It was intended to go out at 10:19 a.m., for the annual Great Shakeout ...

This alarm clock will wake you up with your worst fears An AI takeover, ... Category 10 earthquakes would be felt worldwide. Debris would block out the sun. RASCOE: The threat of nuclear war.

Here’s what happened instead: some users of MyShake were awakened at 3:19 a.m., which would be accurate if your clock was set to Coordinated Universal Time (UTC), which is seven hours ahead of PST.

[1/3] People react after the earthquake alarm sounded, in Mexico City, Mexico, May 8, 2023. REUTERS/Luis Cortes Purchase Licensing Rights, opens new tab.

The earthquake that shook the San Diego area today triggered a false alarm in Northern Michigan.