CTBT: Science and Technology Conference 2025 - SnT2025

The stress mapping in the Bolivian Orocline through probabilistic moment tensor approach

P1.2-377

Not scheduled

1h

Zeremoniensaal

E-poster T1.2 The Solid Earth and its Structure P1.2 The Solid Earth and its Structure

Speaker

Gonzalo Antonio Fernandez (Observatorio San Calixto)

Description

The Central Andes is a geologically complex region due to various tectonic processes, including extensional and compressional strains. This complexity is particularly evident in areas like the Bolivian Orocline, where a lack of geophysical equipment, such as seismic stations, often hinders studies related to tectonics and seismology. Despite this limitation, new methodologies have been developed for the available data. One such approach is an open source method for performing moment tensor inversion based on probabilistic and Bayesian optimization. By merging data from the International Monitoring System, open seismic network data, and local information, we obtained 13 new moment tensors. These tensors map the stress in the Central Andes, showing extensional forces in the Altiplano and compressional forces in the Sub Andes. Our results suggest a dynamic equilibrium within this context, indicating that some tectonic systems are partially blocked, which motivates us to continue this research.