Seismic velocity structure and seismotectonics of the southern Vienna Basin (Austria) with a large-N nodal deployment
- Author(s)
- Clement Esteve, Jeremy M. Gosselin, Yang Lu, Götz Bokelmann, Gregor Götzl
- Abstract
In spring 2024, we deployed a large seismic nodal array across the southern Vienna Basin, Austria. Using a machine-learning approach, we constructed a seismic catalog for the 60-day deployment period and reliably identified 100 events. We applied a local earthquake tomography inversion procedure to relocate the detected events and derive three-dimensional P- and S-wave velocity models and VP/VS estimates. The results reveal a low-velocity anomaly with high VP/VS estimates, corresponding to the Neogene basin structure. In contrast, high-velocity anomalies with low VP/VS estimates highlight nappe systems associated with the Alpine Orogen. Most of the relocated seismicity during the deployment is linked to the April 14th, 2024, M ~ 3 earthquake. The mechanism for this event, along with its aftershock distribution, suggest that the rupture occurred on a normal splay fault of the Vienna Basin Transfer Fault System, situated near its intersection with the basal detachment at depth. As this area is highlighted for its geothermal resource potential, a comprehensive understanding of geological structures and potential hazards is essential for responsible resource development.
- Organisation(s)
- Department of Meteorology and Geophysics
- External organisation(s)
- University of Calgary, Geologische Bundesanstalt
- Journal
- Austrian Journal of Earth Sciences
- Volume
- 118
- ISSN
- 0251-7493
- DOI
- https://doi.org/10.17738/ajes.2025.0011
- Publication date
- 2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105122 Seismic
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/5e8a96da-967a-44f0-be68-c1877fdc8d8a