Overview
- Mexico’s seismic network recorded a string of low-to-moderate quakes on Monday, August 31, 2026, with the largest measured at magnitude 4.4 offshore Chiapas.
- The Servicio Sismológico Nacional published time-stamped technical parameters for several events off Chiapas and Oaxaca, including M3.9, M3.7, M4.0, M4.1 and a later M4.1 near Mapastepec.
- Peru’s Instituto Geofísico del Perú reported an unrelated M4.1 at 6:53 a.m. local time near Huasicancha in Junín with a focal depth of about 8 kilometers.
- State and national Protección Civil teams carried out routine inspections and found no reports of major structural damage while urging residents to follow official channels and preparedness guidance.
- Seismologists said the activity is consistent with the Cocos plate subducting beneath North America and stressed continuous monitoring for possible aftershocks and any changes in seismic patterns.