Overview
- Mexico’s National Seismological Service reported three events in Naucalpan between 16:36 and 16:45 local time with magnitudes 2.3, 2.5 and 1.6 at roughly 1 km depth.
- Residents in Naucalpan and Mexico City’s Miguel Hidalgo and Azcapotzalco reported brief jolts, prompting precautionary evacuations in some offices with no injuries or major damage.
- The shallow depth made the low-magnitude quakes perceptible as sharp vibrations despite their limited energy release.
- The SASMEX early-warning system remained inactive because the events were very local and below the system’s activation thresholds designed for larger offshore quakes.
- SSN data show Naucalpan has accounted for a disproportionate share of small epicenters over the past year, and UNAM teams are investigating a possible local fault; a separate M4.0 quake off San Marcos, Guerrero, was recorded minutes later.