Growing up, the Emergency Broadcast System was a kind of sonic boogeyman. Its signature harsh tone would cut through your favorite TV show or song on the radio, announcing that “THIS IS ONLY A TEST”.

CLAIM: An emergency broadcast system test on Oct. 4 will send a signal to cell phones nationwide in order to activate nanoparticles such as graphene oxide that have been introduced into people’s ...

There was an incorrect emergency message broadcast on the emergency broadcast system on Wednesday. The first Wednesday of each month, St. Louis County tests it’s emergency broadcast system ...

WASHINGTON — Around 2:20 p.m. Eastern Time (or a little closer to 2:18 p.m. Eastern) on Wednesday, Oct. 4, millions of cellphones, TVs and radios across the country sent out an alert as part of a ...