Overview
- A series of shallow, moderate offshore quakes near southern Chiapas produced multiple magnitudes around 4.1–4.5 on Friday, July 31, according to the Servicio Sismológico Nacional.
- Monitoring recorded a further M4.2 off Mapastepec early Saturday and the Instituto Geofísico del Perú logged light quakes in Cusco (M3.5) and Ica (M3.8) later on August 1.
- Official technical bulletins place the Chiapas events at shallow focal depths of roughly 7–15 kilometers with epicenters in the Pacific Ocean, which reduces but does not eliminate onshore damage risk.
- State protection and emergency agencies report no structural damage or injuries after inspections and they continue to issue safety guidance such as checking buildings, knowing evacuation routes, and keeping emergency kits ready.
- The quakes reflect the region’s high seismic activity from Cocos Plate subduction and Peru’s location on the Pacific Ring of Fire, so authorities urge vigilance for aftershocks and recommend following only official updates.