Overview

• The quake occurred at 03:19 am on Tuesday, according to the Servicio Sismológico Nacional.
• SSN reported the epicenter southwest of Tonalá, Chiapas at 16.597°, -94.228° with a depth of 17 kilometers.
• The event was measured at magnitude 4.0 based on SSN’s preliminary parameters.
• SSN provides continuous updates on seismic activity through its official channels, including detailed depth information for each event.
• SASMEX explains that seismic alerts are triggered by distance–magnitude thresholds, with higher magnitudes required at greater distances before public warnings sound.