Overview
- The magnitude 5.0 quake struck north of Trancas at 05:47 local time on Sunday, September 20, 2026, and had a focal depth of 197 kilometers, the Instituto Nacional de Prevención Sísmica reported.
- Minutes earlier at 05:32 a magnitude 4.3 event was recorded near Catamarca with a depth of about 205 kilometers, and some residents reported feeling both shocks.
- Mexico's Servicio Sismológico Nacional logged a series of small quakes across Chiapas, Oaxaca and Veracruz on the same day, including several 3.5–3.9 events and a magnitude 4.0 south of Las Choapas at 12:39.
- Initial checks by local protection civil offices and seismic agencies found no reports of injuries or material damage from the Tucumán M5.0 or the Mexican events and authorities have urged residents to follow standard safety protocols.
- Because deep hypocenters like Tucumán's transmit shaking over wider areas but reduce surface force, experts say the main risks to watch for are localized aftershocks and any shallow follow‑up quakes that could cause stronger local impacts.