Overview
- On Friday, July 31, 2026, Mexico’s Servicio Sismológico Nacional logged a cluster of shallow M4.1–4.7 offshore quakes southwest of Ciudad Hidalgo, Chiapas, and a separate M4.4 near Coyuca de Benítez while Peru’s IGP recorded a M3.5 near Chupaca in Junín.
- The SSN reports epicenters 130–166 km southwest of Ciudad Hidalgo with focal depths mostly around 7–15 km, and one deeper event near Pijijiapan at about 93 km; the IGP gave the Chupaca quake a 12 km depth and intensity III on the Mercalli scale.
- State and national Protección Civil teams carried out field inspections after the shocks and, in the latest bulletins, have not confirmed significant structural damage or injuries.
- Seismologists say these events are consistent with ongoing subduction of the Cocos and Nazca plates beneath North and South America, and quakes in the M4 range are commonly felt locally but rarely trigger tsunamis.
- Authorities continue to monitor stations for aftershocks, urge the public to follow official SSN and IGP channels, and recommend basic preparedness steps such as emergency kits and checking buildings for visible damage.