Overview

• Mexico’s Servicio Sismológico Nacional reported a magnitude 5.1 earthquake at 16:33 local time with an epicenter near Pinotepa Nacional, Oaxaca, at roughly 16 km depth.
• The quake was felt in parts of Oaxaca, Guerrero and lightly in Mexico City, where some buildings carried out brief evacuations after mobile alerts.
• SASMEX said the event did not trigger public sirens because initial energy estimates fell below preset criteria tied to distance and magnitude, even as private apps sent notifications.
• Civil-protection agencies activated monitoring protocols and reported no injuries or structural damage, with Guerrero’s governor noting no affectations after inspections.
• The event followed a string of smaller tremors logged Sept. 7–8, and UNAM/SSN reiterated that September’s perceived pattern is a coincidence as Mexico has recorded 21,000-plus quakes so far in 2025.