Overview
- The strongest recorded event was a magnitude 5.1 quake 7 km south of Chupaca in Junín, followed about 17 minutes later by a magnitude 3.7 aftershock on Saturday, July 18.
- Ica has experienced a local sequence of 13 shocks since July 14 with magnitudes between 3.6 and 4.6, according to Peru’s Instituto Geofísico del Perú and regional civil‑defense officials.
- Mexico’s Servicio Sismológico Nacional logged multiple shallow offshore quakes off Chiapas on July 18–19 with preliminary magnitudes that were revised to a cluster of roughly mid‑4.0 events after routine analysis.
- Initial inspections by Protección Civil and Peru’s Indeci reported no major damage or casualties in either country and teams remain on alert to check infrastructure and public facilities.
- Both regions lie on active subduction margins where shallow quakes are common, so agencies are closely monitoring for aftershocks and advising simple preparedness steps such as emergency kits, family plans, and safety drills.