As powerful earthquakes measuring 7.1 and 7.5 magnitude struck Venezuela, causing widespread destruction and panic, many users reported receiving earthquake warnings from Google moments before the tremors were felt.
The alerts sparked curiosity about how Google’s Android Earthquake Alerts System can detect seismic activity and notify people before the strongest shaking begins.
Several users on social media platform X shared screenshots claiming they had received earthquake alerts from Google moments before the tremors occurred.
According to experts, the technology behind these alerts is directly linked to smartphones. Every modern smartphone contains a special sensor known as an accelerometer.
While this sensor is commonly used to rotate the phone’s screen or detect movement, it can also identify ground vibrations.
When an Android phone detects vibrations that may indicate the early stages of an earthquake, it sends a signal to Google’s Android Earthquake Alerts System along with general location information.
Google’s servers then compare this data with signals received from other phones in the same area. If a large number of devices detect similar vibrations, the system determines that an earthquake may be occurring and immediately issues warnings.
Google says that more than two billion Android phones worldwide are part of this network, making it the world’s largest distributed earthquake detection system.
