Turning Android Phones into an Earthquake Detection Network

Google has quietly transformed billions of Android phones into the largest earthquake detection system ever established. Remarkably, these devices can notify users about impending earthquakes even before they feel the shaking. While it’s quite a feat for Android, iPhone users can also take similar precautions.

Understanding How It Works

Earthquakes usually start with very subtle signals known as p-waves. Many people might not notice them at all. However, the accelerometer in your phone, the same one that detects when you turn your device sideways, can pick up these initial movements.

When several Android phones in a given area detect the same motion, Google’s system kicks into gear, sending early alerts to users just moments before the stronger and potentially more damaging S-waves arrive. This could provide anywhere from 15 to 60 seconds of warning—admittedly not a lot of time, but enough to get away from windows, duck under a desk, or stop whatever you’re doing, like climbing a ladder. Those seconds count when the ground shakes.

The Reality of the Technology

This is not merely an idea floating around. Research shows that the Android-based earthquake detection network has recorded over 11,000 actual earthquakes between 2021 and 2024, spanning 98 countries and sending out about 18 million alerts each month. In some instances, alerts reached people more than a minute before shaking began, and only three false reports occurred among more than 1,300 confirmed events. It’s a pretty impressive safety feature baked into your phone.

Stay Prepared

Even if you’re not living in a high-risk area, check that your earthquake detection settings are activated—especially if you travel. Here’s how to do it:

• Open Settings.
• Tap on Safety and emergency.
• Find Earthquake warning and ensure it’s enabled.
• Test the alerts to hear what they sound like.

If you own a Wear OS smartwatch, it will also notify you, even if your phone is out of reach.

How About iPhone Users?

Currently, Apple doesn’t offer an in-built earthquake detection feature. Though the iPhone is equipped with its own accelerometer, it doesn’t utilize it for earthquake alerts. iPhone users can download the free MyShake app to receive notifications from official earthquake monitoring networks.