Overview
- The Segundo Simulacro Nacional 2026 was held on Saturday, September 19 at 12:00 central time and sent a cellular broadcast to over 80 million phones while thousands of public altavoces sounded across the country.
- Mexico City reported about 7.8 million participants, a 98.93% functionality rate for its 28,287 altavoces and an average evacuation time of one minute and 43 seconds from upper floors to street level.
- The Servicio Sismológico Nacional said its monitoring systems and social channels operated normally during the exercise and the Centro de Instrumentación y Registro Sísmico/C5 led the local activation in CDMX.
- The notification label shown on phones was changed from 'Alerta Presidencial' to the neutral 'Alerta Máxima' after guidance from the Comisión Reguladora de Telecomunicaciones and the federal government.
- Authorities staged regional rescue and hospital-readiness scenarios, will publish consolidated participation and evaluation data in the coming hours and days, and used the September 19 date to reinforce household preparedness tied to past major quakes.