Building Damage Assessment in Viterbo Town, Caldas Department, Colombia as of 12 August 2026

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)Buildings and infrastructureColombia
Colombia

About this dataset

**UNOSAT code: EQ20260810COL, GDACS ID: 1557236** This map illustrates structures and buildings affected by the magnitude 7.4 earthquake with an epicentre south of San José del Palmar town in Colombia, with analysis focused on Viterbo in Caldas Department, approximately 50 km from the mainshock epicentre. Damage and destruction were identified primarily using Pleiades very-high-resolution satellite imagery acquired on 12 August 2026. In this area 55 buildings were identified as damaged and 99 were identified potentially damaged buildings. This is a preliminary analysis and has not yet been validated in the field. Ground verification is encouraged, and feedback can be sent to the United Nations Satellite Centre.

Documentation

UNOSAT datasets and maps are produced using a variety of methods. In general, analysts closely review satellite imagery, often comparing two or more images together, and determine notable changes between the images. For damage assessments, refugee or IDP assessments, and similar analyses, these changes are then manually documented in the vector data by the analyst. For flood extractions, landcover mapping and similar analyses, a variety of automated remote sensing techniques are used to extract the relevant information which is then reviewed and revised as necessary by the analyst. In all cases, resulting data is then loaded into a standardized UNOSAT geodatabase and exported asshapefiles for dissemination. This is a preliminary assessment and has not yet been validated in the field. It is important to consider the characteristics of the source imagery used in the analyses when interpreting results. For damage assessments it should be noted that only significant damage to the structural integrity of the buildings analyzed can be seen in imagery, while minor damage such as cracks or holes may not be visible at all. For flood extractions using radar data it is important to note that urban areas and highly vegetated areas may mask the flood signature and result in underestimation of flood waters. Users with specific questions or concerns should contact unosat@unitar.org to seek clarification.

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