Venezuela's quakes proved Android's earthquake alerts matter. What about iPhone?

Footage shared all over social media caught the moment, phones chiming in unison just before everything moved. However, it should be noted that Google is careful to say the system doesn't predict earthquakes. It detects them as they start and races the warning out ahead of the damage.

How your phone becomes an earthquake sensor

The trick is the accelerometer, the same sensor that flips your screen when you turn the phone sideways. Sitting still, it can also feel the ground shake.

Earthquakes travel in waves, and the fast but weak P-waves arrive ahead of the slower, more destructive S-waves. When a phone catches that early tremor, it sends a signal and a rough location to Google's servers.

A single phone could be a dropped device or passing truck. But thousands reporting the same shake at once let the system confirm a real quake and warn people ahead of the destructive waves, what Google's research team has called the world's largest earthquake detection network.

The animation above is a magnitude 6.2 Turkey quake from last year, not Venezuela, but the mechanism is the same.

A global safety net that started small

Android Earthquake Alerts began quietly in 2021 in New Zealand and Greece, and have grown considerably since. Google's own numbers tell the story:

• Nearly 100 countries are now covered
• More than 790 million alerts have been sent to phones
• Early-warning access is up from 250 million people in 2019 to about 2.5 billion today

In the US, it leans on the official ShakeAlert network in California, Oregon and Washington, which we covered when alerts reached all 50 states. Everywhere else, the phones do the detecting.



However, in countries like Venezuela, there is no government early-warning network. Because of this, the crowdsourced layer became what this system was dependent on, instead of just a backup.

Where this leaves your iPhone

Here's the part Apple fans won't love. iPhones aren't fully in the dark, since Apple added Enhanced Safety Alerts that pass along warnings and relay them between nearby devices.

However, going by Apple's own support pages, those alerts need an official source to already exist. Apple has no phone-sensor detection network of its own, so where no government system feeds it, like in Venezuela, an iPhone has nothing to pass along.

An iPhone in a quake-prone area with a government system is likely fine. Without one, that's the gap Google built its network to fill.

What should you do when an earthquake alert appears?

The hard lesson out of Venezuela was about awareness, not the tech. Many people there had never seen the alert and weren't sure what it meant, so the warning landed but the response often didn't.

If a Take Action alert takes over your screen, the advice is the one rescue experts repeat: drop, cover and hold on. A Be Aware alert is gentler, just a heads-up that lighter shaking may be coming.

Here's how to turn on Android Earthquake Alerts

1. Open the Settings app on your Android phone
2. Tap Safety & emergency, or search "earthquake" in Settings
3. Select Earthquake alerts
4. Switch the toggle on, and keep location enabled

It takes under a minute, and it's usually on by default, but it's worth checking rather than assuming.

The seconds that matter

I think this is one of the quietly important things Android does, a feature you hope to never need that did exactly what it promised on June 24.

Credit where it's due, Google turned a screen-rotation sensor into a planet-sized warning system that works best where seismic networks don't exist. It bought people seconds in Venezuela, and what I'd love to see next is Apple matching it with real detection instead of relays, plus better awareness so the alert lands the first time.

• Read our full Pixel 10 Pro review
• Browse our best Pixel phones list
• Follow me @jojothetechie on X and Threads for hot takes and behind-the-scenes coverage.