Emergency Alert System

telecommunications status

U.S. radio/TV system for public alerts of threats to public safety since 1997

thumb|Test of the Spanish EU-Alert variant (ES-Alert) in Barcelona in 2023, on an iOS device. EU-Alert is a Public Warning System designed to disseminate emergency alerts to mobile phones based on Cell Broadcast technology, as defined by ETSI standards. National authorities are able to disseminate emergency alerts and warning messages through the system. EU-Alert is a standard designed for interoperability and national implementation may vary. The standards are based on NL-Alert from the Netherlands, which first became operational in 2012.

false public emergency alert incident in 2018

mobile device emergency announcement system in the United States

defunct emergency warning system used in the United States by television and radio stations between 1963 and 1997

CONELRAD (Control of Electromagnetic Radiation) was a method of emergency broadcasting to the public of the United States in the event of enemy attack during the Cold War. It was intended to allow continuous broadcast of civil defense information to the public using radio stations, while rapidly switching the transmitter stations to make the broadcasts unsuitable for Soviet bombers that might attempt to home in on the signals (as was done during World War II, when German radio stations, based in or near cities, were used as beacons by bomber pilots).

24-hour network of VHF FM weather radio stations in the United States