Overview
- The Servicio Sismológico Nacional recorded several low-to-moderate earthquakes on Tuesday, September 22, including a magnitude 4.1 about 127 km southwest of Ciudad Hidalgo and a magnitude 4.0 near Huetamo.
- Reported events spanned Chiapas, Michoacán and Oaxaca with focal depths ranging from about 5 km to 150 km, and initial local and national checks found no material damage or injuries.
- SSN, operated by UNAM, published the event times, epicenters and depths in real time while Protección Civil and local authorities continued routine monitoring and urged people to follow official channels.
- The episodes reflect persistent tectonic activity where the Cocos, North American, Pacific and Caribbean plates interact, and experts note that shallower quakes are felt more strongly at the surface than deeper ones.
- Authorities advised maintaining preparedness through drills, emergency kits and verified SSN/Protección Civil updates because earthquakes cannot be predicted and replicas remain possible.