How some Venezuelans’ smartphones warned of a deadly quake

Social media users report receiving emergency alerts on Android devices moments before the tremor struck.

CARACAS: Many social media users in Venezuela have reported receiving alerts on their Android smartphones moments before a deadly earthquake, which has resulted in over 900 confirmed deaths. Whilst both Google’s Android and Apple’s iOS systems include options to display government-issued emergency alerts, the search giant detailed its own distributed detection system last year, which utilises the billions of Android smartphones worldwide to identify seismic activity in the first instance.

The technology relies on the accelerometer found in almost every smartphone, which is a movement sensor typically utilised for tasks such as flipping the screen when users turn their device sideways. According to a blog post published by Google in July 2025, this same sensor can detect the ground shaking caused by an earthquake. The accelerometers can identify the fast-moving initial “P” wave of a potential earthquake and transmit the data to a Google server. By rapidly cross-referencing numerous reports, the system can confirm the tremor and estimate its location and magnitude.

The ultimate objective of the system is to provide a warning to as many people as possible before the slower, more destructive “S” wave reaches their location. Google offers two distinct tiers of alerts: “BeAware,” which warns of weaker tremors, and “TakeAction,” which overrides the user’s screen and plays a loud sound, even if the device is set to silent mode.

Whilst the system has provided early warning access to millions, it has experienced significant setbacks. Google reported last year that its systems had issued 790 million alerts for over 2,000 potentially dangerous earthquakes since April 2021. However, Android devices failed to sound warnings prior to the devastating February 2023 earthquakes that claimed almost 60,000 lives across Turkiye and Syria. Google noted that it has since updated its algorithms to prevent a recurrence, and the company also issued an apology in February 2025 following a false alarm in Brazil.

Outside of government warnings, Apple states that users in the US and Taiwan may receive alerts from various “alert originators”. Unlike Google, the company has not deployed its users’ handsets for a distributed detection network. However, Apple devices are capable of forwarding received alerts to nearby handsets that lack mobile reception or a WiFi connection, which may assist in disseminating life-saving information.