Overview
- The Servicio Sismológico Nacional recorded dozens of low-to-moderate earthquakes between July 9 and 11, concentrated off the coasts and interior of Oaxaca, Guerrero, Chiapas and Veracruz.
- Notable events included a magnitude 4.1 near San Marcos, Guerrero on July 10, a very shallow M3.7 southeast of Salina Cruz, Oaxaca in the early hours of July 11, and a separate M4.3 offshore Lurín, Lima reported by Peru’s IGP on July 10.
- Recorded focal depths ranged from about 3–5 kilometers for shallow shocks up to more than 150 kilometers for deep events, a difference that makes shallow quakes feel stronger locally despite modest magnitudes.
- Federal and local civil‑protection agencies and the SSN and IGP continue active monitoring, have not reported significant structural damage, and are urging residents to follow official channels and basic preparedness steps.
- Mexico’s frequent seismicity reflects the complex interaction of the Cocos, Pacific, Rivera and North American plates, so officials warn to expect routine events and watch for possible replicas that could affect perception or trigger localized checks of infrastructure.