A magnitude 5.6 earthquake struck on Monday, May 4, 2026, at 09:19 hours, with epicenter 14 km northwest of Pinotepa Nacional, Oaxaca. The seismic alert sounded on loudspeakers in Mexico City, prompting evacuations, but did not activate on cell phones due to maintenance. Authorities confirmed no damages or victims reported.
The National Seismological Service (SSN) recorded the magnitude 5.6 quake at 09:19 hours on May 4, 2026, with epicenter 14 km northwest of Pinotepa Nacional, Oaxaca, at a depth of 10 km and latitude 16.44. The earthquake was felt in Mexico City and southern regions, two days before the First National Drill scheduled for May 6 at 13:00 hours.
In CDMX, the seismic alert triggered evacuations from homes, offices, and public buildings. President Claudia Sheinbaum stated: “Me informa la Coordinadora de Protección Civil que hasta el momento no se reportan daños ni víctimas por el sismo”. Myriam Urzúa, head of capital Civil Protection, said: “no tenemos ninguna afectación” after initial inspections. Mexico City Head of Government Clara Brugada confirmed protocols with agencies including Government, Public Security, Civil Protection, and C5.
The Navy Secretariat ruled out tsunami risk. However, many users reported no alert on their cell phones. The Agency of Digital Transformation and Telecommunications (ATDT) explained: “La plataforma de alertamiento en celulares se encontraba en mantenimiento rápido en preparación del Primer Simulacro Nacional 2026”.
Social media users criticized the failure: “¡Un sistema alta criticidad nunca debe fallar! ¡Y presumen ser la Agencia de Transformación Digital!”. The Security Cabinet maintains communication with state and local authorities for preliminary assessments.
