Overview
- The strongest recent event was a magnitude 4.2 recorded 120 km southwest of Ciudad Hidalgo on Wednesday, Sept. 23, at about 02:23 local time and at 10 km depth, the Servicio Sismológico Nacional reported.
- Multiple shallow quakes struck Chiapas on Sept. 22–23, with measured magnitudes around 3.7–4.1 along the coast and a separate M4.0 recorded near Huetamo, Michoacán, during the same period.
- Officials say there are no confirmed deaths or major structural damage from these tremors and Protección Civil and SSN maintain 24-hour monitoring and public advisories.
- Seismic activity was also recorded outside the southeast, including a M3.5 near Guadalupe Victoria, Baja California, and a M4.2 reported near Matías Romero, Oaxaca, showing nationwide tectonic restlessness.
- Mexico’s complex plate setting drives frequent quakes and experts note aftershock sequences can persist for months; authorities urge simple preparedness steps such as emergency kits, identified safe zones, and following SSN updates.