Australia Tests AusAlert System Nationwide July 27

The Australian federal government will conduct a nationwide test of its new AusAlert emergency warning system on July 27 at 2 p.m. AEST, sending a blaring siren and message to approximately 25 million compatible mobile phones across the country. The test marks a key step toward replacing the current patchwork of state-based alerts with a unified national platform, set to become operational in October.

AusAlert uses cell broadcast technology to deliver geographically targeted warnings without relying on traditional mobile networks, ensuring messages reach devices instantly regardless of traffic volume. This method, employed in more than 35 countries including the United States, United Kingdom, and Canada, allows alerts to be sent to areas as small as 160 meters, such as a single street or building. It functions on virtually all SIM-enabled phones, including those owned by residents and visitors, and does not collect phone numbers or location data. Officials estimate about 90 percent of devices, particularly those manufactured from 2019 onward, will be compatible, with ongoing testing for older models.

The system features two alert levels. Critical warnings, for imminent threats...