High Resolution Joint Inversion of the Greater Alpine Region using the AlpArray Seismic and Gravity Datasets

The Alps is a complex and dynamic region and although it has been extensively studied and has provided crucial information in understanding orogenic processes, there is still much that is continually debated in this region, such as the interactions and variations between crustal and mantle processes and structures. The AlpArray seismic network was deployed with the intention of providing a dataset that could help resolve some of these debates. It is made up of 628 stations (352 permanent and 276 temporary) deployed across 11 countries covering the greater Alpine region. The density and spatial consistency of this network provides a unique opportunity to examine the seismicity in the Alps as well as to apply geophysical methods such as tomography to provide high resolution images of this area allowing for a better understanding of these crustal and mantle dynamics. Previous studies have used this rich dataset to implement these methods such as local earthquake tomography, ambient noise tomography and teleseismic tomography. However, none have jointly inverted local and teleseismic datasets with gravity, which is what we undertake with this research. We are in the process of creating an augmented catalogue of P and S wave arrivals using an automated algorithm called REST which has already been successfully used in another orogenic region, the Andes. This catalogue will be used in the joint inversion with previously compiled teleseismic and gravity datasets to give a comprehensive image of the subsurface structure down to mantle depths consistent with these 3 datasets.