“Presidential Alert,” the message read. “THIS IS A TEST of the National Wireless Emergency Alert System. 📳 TODAY (10/3): At 2:18 PM EDT, we will be testing the Wireless Emergency Alert system nationwide. The cellphone alert is also accompanied by a similar test of the Emergency Alert System, an older system that handles radio and television. FEMA last tested the EAS in 2016 and 2017, and the first wireless emergency alerts were sent in 2012.

Source: Washington Post October 03, 2018 11:35 UTC