The 1920 Xalapa earthquake was the deadliest in Mexico's history prior to 1985—killing at least 648 people.[2] It occurred on January 3 at 22:25 local time,[3] during a period of political unrest in the country. Mudflows and landslides triggered by the shock destroyed buildings in rural towns across the states of Veracruz and Puebla, causing most of the deaths. The earthquake was attributed to a shallow fault in the Trans-Mexican Volcanic Belt. It measured moment magnitude 6.3–6.4 and had a hypocenter depth of <15 km (9.3 mi). The Mexican government took immediate action in the aftermath—providing assistance and establishing communication services. Severely damaged towns including Xalapa were rebuilt, while others had to be abandoned. Help to survivors also came from civil society groups, civilians, and the Catholic Church. The earthquake's aftershocks were studied by scientists to determine its seismological characteristics.
^ISC 2022.
^National Geophysical Data Center / World Data Service (NGDC/WDS) 1972.
^National Seismological Service n.d., p. 1.
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