Background on the Simulation and its Relevance
On April 29, 2025, Mexico conducted its first national earthquake simulation, focusing on a hypothetical magnitude 8.1 quake with its epicenter near Tehuantepec, Oaxaca. This simulation aimed to test the country’s emergency response system and communication channels, including an innovative cell phone alert system.
Scope and Reach of the Alert System
The alert system reached 11 Mexican states: Chiapas, Ciudad de México, Colima, Estado de México, Guerrero, Jalisco, Michoacán, Morelos, Oaxaca, Puebla, and Tlaxcala. The alerts were disseminated through 14,049 loudspeakers across the 16 boroughs of Mexico City, local radio and television stations, and via cell phone messages.
Content of the Cell Phone Alert
Residents of Mexico City who received the alert on their mobile devices saw a message with the following content:
- THIS IS A SIMULATION – The seismic alert was activated on April 29, 2025, at 11:30 AM.
- THIS IS A SIMULATION
Following the message, cell phones vibrated and produced a distinct sound for approximately 8 seconds. This simulation was an opportunity to evaluate the effectiveness of the alert system and coordinate a timely response for the population.
Leadership and Coordination
The National Emergency Response Committee, chaired by Omar García Harfuch, Secretary of Security and Citizen Protection, played a crucial role in coordinating the nationwide response. The committee included the Legal and Enlarged Gabinete, along with virtual participation from all 32 state governors.
Key Questions and Answers
- What was the purpose of the First National Earthquake Simulation 2025?
The simulation aimed to test Mexico’s emergency response system and communication channels, including the new cell phone alert mechanism. - Which states were included in the alert system?
The alert reached residents in Chiapas, Ciudad de México, Colima, Estado de México, Guerrero, Jalisco, Michoacán, Morelos, Oaxaca, Puebla, and Tlaxcala. - What did the cell phone alert message say?
The message read: “THIS IS A SIMULATION” followed by “THIS IS A SIMULATION,” indicating the start and end of the simulation. - Who led the National Emergency Response Committee?
Omar García Harfuch, Secretary of Security and Citizen Protection, chaired the committee responsible for coordinating the nationwide response.
