Overview
- The Servicio Sismológico Nacional confirmed a magnitude 5.0 quake that occurred at 01:43:19 on Wednesday about 102 kilometers southwest of Mapastepec, Chiapas, with a reported depth of 10 kilometers.
- The M5.0 was the largest in a cluster of small-to-moderate instrumentally recorded events between October 5 and 7 that included several M3.8–3.9 shocks and earlier M4.0 and M4.1 events in Oaxaca and Chiapas.
- The Coordinación Nacional de Protección Civil and state Protección Civil teams carried out inspections and reported no injuries or structural damage while continuing to monitor for aftershocks and coordinate local checks.
- Seismologists cautioned that initial times, magnitudes and depths can be adjusted after station reprocessing and noted that Mexico’s alert system uses distance and magnitude thresholds that often leave shallow or small events from triggering public alarms.
- Chiapas sits above an active Cocos‑North America subduction zone and recorded more small quakes in early 2026 than a year earlier, a trend that officials say increases the need for routine preparedness, building checks and clear official communications to local communities.