Google is expanding Android earthquake alerts from 98 countries and regions to more than 200.

The October 15 rollout adds places including Panama and Guatemala.

Full availability in the new regions is expected over the next week.

Plugged-in, still phones act as tiny seismometers using their accelerometers.

When enough phones detect shaking, Google estimates the quake and pushes warnings.

The system has sent more than one billion alerts since launching in 2021.

Alerts come in three levels: Be Aware, Be Ready and full-screen Take Action.

Read the full article for more details on Android earthquake alerts.