M7.4 Earthquake Strikes Near San Pedro de Atacama, Chile

On 19 July 2024 at 01:50 local time, a magnitude 7.4 earthquake occurred 41 km east-southeast of San Pedro de Atacama in northern Chile. The event registered at a focal depth of 127.2 km, placing it well within the intermediate-depth range typical of the subduction zone beneath the Andes.

San Pedro de Atacama lies in the Atacama Desert within the Central Andean volcanic zone. This setting results from the ongoing subduction of the Nazca Plate beneath the South American Plate at rates of approximately 6–7 cm per year. The geometry of the subducting slab produces earthquakes at varying depths, with deeper events like the July 2024 shock occurring as the plate descends into the mantle.

The region has experienced significant seismic activity throughout recorded history, driven by this convergent margin. Intermediate-depth earthquakes are common and can generate widespread ground shaking even at considerable distances from population centers. The 19 July event was the only magnitude 7.4 or greater earthquake recorded in the immediate vicinity since 2000.

Seismic monitoring networks operated by Chilean agencies recorded the mainshock and subsequent aftershocks. Given the depth, surface rupture was not expected, and damage reports remained limited to minor structural effects in nearby settlements. The Atacama’s arid climate and sparse population density further reduce overall exposure compared with coastal segments of the subduction zone.

Ongoing tectonic processes continue to shape the landscape, producing both seismic and volcanic hazards. Continued monitoring and adherence to updated building codes remain essential for communities in this geologically active portion of the Andes.