Phone features saved many lives before the earthquake in Venezuela
Warnings appeared to help many people find a safe place in time
On social networks, many people said the phone alarm helped them get out of the elevator, away from the glass doors and find a safe place before the strongest vibrations occurred.
One Twitter user shared that the warning sounded a few seconds before the earthquake, enough time for family members to run to the garden outside.
Many other people also recounted similar experiences, causing many people to question whether Google can predict earthquakes.
But that's not the case. Instead, Google's Android Earthquake Warning System detects the first signs of an earthquake soon after the event begins and then quickly sends warnings to users in at-risk areas.
According to experts, these short seconds of warning can make a big difference in emergency situations.
Media reports show that many Android users in Venezuela received notifications showing the estimated intensity of the earthquake as well as the distance from the user's location to the epicenter, giving them precious extra seconds to protect themselves.
How does the warning system work?
In essence, the technology behind the Earthquake Warning System is the accelerometer built into most Android phones.
Normally, this sensor helps the phone recognize the direction of screen rotation or device movement.
However, it is also capable of detecting unusual vibrations caused by earthquakes.
When multiple phones in the same area simultaneously record similar signals, the data is sent to Google's servers for analysis.
The algorithm will rely on data to determine the location, magnitude and expected impact of the earthquake. If the system assesses that tremors could cause damage, an alert will automatically be sent to people in the affected area.
This technology works on the difference between two types of seismic waves. P waves (Primary waves) are the first waves to appear and usually cause little damage, while S waves (Secondary waves) come more slowly but create most of the dangerous vibrations.
By detecting P waves right from the first seconds, the system can send warnings before S waves reach.
The system currently uses two levels of alerts. With slight vibrations, the phone will display the message “Be Aware”. For areas expected to experience strong shaking, a “Take Action” warning will sound loudly, illuminate the screen, and display emergency response instructions.
When you click on the alert, the system displays safety instructions and a map showing the location and initial estimated magnitude of the earthquake.
Because they are transmitted electronically, warnings can reach phones faster than seismic waves move underground.
According to Google, that short amount of time is enough for a person to step down from the ladder, stay away from heavy objects that are at risk of collapsing or take defensive measures such as "crouching low, covering and holding on".
The corporation actually began deploying an earthquake warning system on Android since 2020. To date, this technology has been expanded to 98 countries around the world.
According to research published in the journal Science in 2025, the system detects an average of about 312 earthquakes per month globally, with magnitudes ranging from 1.9 to 7.8 magnitude.
Every month, about 60 earthquakes with a magnitude of 4.5 or more are sent warnings to users, reaching about 18 million phones.
Surveys of those who received warnings showed that 36% received the notification before feeling shaking, 28% received it during the earthquake and 85% confirmed that the warning accurately reflected what they experienced.
During the 6.7 magnitude earthquake in the Philippines in 2023, the system issued the first warning just 18.3 seconds after the earthquake began. People near the epicenter received up to 15 seconds of warning. As for people farther away, they can receive warnings up to a minute in advance. According to statistics, a total of nearly 2.5 million people were warned during this disaster.