Overview

• At 12:00 local time Friday, the Segundo Simulacro Nacional will send a test alert to roughly 80 million phones via cell broadcast.
• The scenario models a magnitude 8.1 earthquake off Lázaro Cárdenas, with activation of SASMEX sirens plus transmissions on 100 radio stations and 11 television broadcasters.
• Phone alerts will appear as a full-screen notice with distinctive sound and vibration even on locked or silent devices, developed by the ATDT with AT&T, Telcel and Altán Redes.
• Authorities advise enabling government emergency alerts in Android and iOS settings, warning that devices with those notifications turned off may not receive the test.
• Mexico City Metro will stop trains in stations, move trains between stations to the next stop, and for the first time run a central command post to coordinate response.