Overview
- The July 17 M7.4 quake near Ciudad Hidalgo has produced 1,003 aftershocks through July 26, with the largest replica around magnitude 6.5, the Servicio Sismológico Nacional (SSN) reported.
- A magnitude 5.9 event was recorded offshore on July 27 at a shallow depth of 10 kilometers and was followed by several M4.x shocks on July 27–28, all logged by the SSN.
- Protection Civil teams carried out inspections and say there have been no reports of significant structural damage or fatalities from the recent Chiapas events.
- Elsewhere in the region, shallow M4.x quakes rattled Mendoza, Argentina without damage, and a separate M7.1 struck Kumamoto, Japan on July 28 triggering tsunami alerts and causing injuries as authorities assess impact.
- Chiapas sits on a Cocos‑plate subduction margin so authorities urge preparedness and continued monitoring while technical bulletins from SSN guide inspections and public safety steps.