Overview

• On July 29 at 9:58 a.m., a magnitude 4.5 quake struck 31 kilometers northwest of Santa María Atzompa, interrupting the governor’s press conference and prompting the evacuation of 57 people without injuries.
• The Sistema de Alerta Sísmica Mexicano did not issue a warning for the Oaxaca tremor because initial energy estimates fell below pre-established thresholds.
• Protección Civil de Oaxaca has conducted ongoing inspections of public buildings with no major damage reported.
• Hours later, 5.7 to 5.9 magnitude shocks hit the Chiapas–Guatemala border, prompting tsunami watches, building evacuations in Guatemala and Chiapas, and continued aftershock monitoring.
• Guatemalan authorities have evacuated buildings as a precaution following the tremors, reporting no fatalities to date.