Geodetic analysis of the Cerro Blanco Caldera, Catamarca
Keywords:
Geodesy, geophysics, subsidence, GNSS, gravimetryAbstract
The Cerro Blanco Volcanic Complex (CBVC) in Argentina is a nested caldera system that includes the Cerro Blanco Caldera (CBC) and the Robledo Caldera, being one of the youngest caldera complexes in the Central Southern Andes. Subsidence recorded in the CBC has shown a deceleration of the deformation rate from 1992 (2.6 cm/year) to 2020 (0.7 cm/year). This study aims to analyze the ground deformation in the CBC through survey campaigns, applying GNSS and gravimetric measurements. For this purpose, an update of the deformation status of the CBC was carried out by processing GNSS data from the previous 2013 and 2015 campaigns with the most recent one of 2021, along with a gravimetric analysis of the latest campaign as a complementary tool, in order to confirm the continuation of the caldera subsidence phenomenon. Preliminary results indicate a subsidence-related deformation centered on the CBC throughout the period under analysis.
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Copyright (c) 2025 Ailin Pereira, Juan Manuel Alcácer Sánchez, José Germán Viramonte, Ayelén Pereira, María Cristina Pacino
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