Vulnerability of Machu Picchu citadel 100 years after its scientific discovery

A century after its discovery, the Inca citadel of Machu Picchu shows signs of seismic vulnerability despite being located in a region characterized by low seismic activity. Research indicates that historical stone constructions within the site exhibit damage patterns suggestive of past earthquake exposure or other geodynamic forces. The study employed field surveys to assess structural conditions and micro vibration measurements to analyze dynamic characteristics, revealing potential risks even in areas with infrequent seismic events. These findings underscore the need for closer examination of Machu Picchu's resilience to natural hazards, particularly given its status as a UNESCO World Heritage Site and one of the New Seven Wonders of the World.

Cuadra, C. (2011). Vulnerability of Machu Picchu citadel 100 years after its scientific discovery. WIT Transactions on the Built Environment, 1, 723–734. https://doi.org/10.2495/str110601