Overview

• At 12:00 local time, the Second Simulacro Nacional modeled a magnitude 8.1 earthquake off Lázaro Cárdenas, with parallel scenarios for hurricanes, tsunamis and urban fires by region.
• Authorities activated 14,491 public loudspeakers and partnered with more than 100 radio stations and 11 television networks to carry the alert nationwide.
• Phones received a distinct test tone and message without requiring apps or internet access, with officials noting the alerts can sound even if devices are on silent and offering support via 079.
• President Claudia Sheinbaum led a 7:19 a.m. flag ceremony in Mexico City’s Zócalo to honor victims of the 1985 and 2017 quakes alongside security and civil protection leaders.
• Seismologists emphasized that notable 19 September earthquakes are a statistical coincidence, and reports noted broad public participation with no concurrent damaging quakes during the drill.