J-Alert - WikipediaDiagram of the J-Alert system J-Alert (Japanese: J－ALERT/Jアラート, romanized: J Arāto; full name 全国瞬時警報システム, Zenkoku Shunji Keihō Shisutemu, 'National Early Warning System') is the early warning system used in Japan. J-Alert was launched in February 2007.[1] The system is designed to quickly inform the public of threats and emergencies such as earthquakes, severe weather, and other dangers. The syste
