Overview
- The SSN recorded several small quakes on Thursday, September 24, including a M4.0 about 87 km southwest of Ciudad Hidalgo that official reports link to the July 17 M7.4 Chiapas aftershock sequence.
- Other events logged that day included a M3.7 at 03:42 near Pijijiapan, a M3.6 at 02:18 near Tehuantepec, a M3.6 at 01:54 west of Cintalapa, and a M3.5 at 19:59 near Pinotepa Nacional.
- Local and federal protection agencies carried out routine inspections after each detection and reported no material damage or injuries in affected communities.
- The shocks reflect the active subduction of the Cocos plate beneath the North American plate along Mexico’s Pacific margin, a zone that routinely produces small to large earthquakes.
- SSN and Protección Civil urge the public to follow official channels for alerts and preparedness guidance because ongoing monitoring shows more aftershocks are likely in the coming days.