EGU24-19217, updated on 11 Mar 2024
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

The potential of high density seismic arrays to elucidate distributed deformation in the Dinarides and Hellenides

Frederik Tilmann1, Andreas Rietbrock2, Bernd Schurr1, Ben Heit1, Michael Frietsch2, Hans Agurto-Detzel2, Ya-Jian Gao2, Sofia-Katerina Kufner2, Edmond Dushi3, Besian Rama3, Damiano Koxhaj3, Dinko Sindija5, Gesa Petersen1, Efthimios Sokos4, Claudio Faccenna1, Thomas Meier6, and Petr Kolinský7
Frederik Tilmann et al.
  • 1Deutsches GeoForschungsZentrum, GFZ Potsdam, Potsdam, Germany (
  • 2Geophysical Institute (GPI) Karlsruhe Institute of Technology (KIT)
  • 3Institute of Geosciences, Polytechnic University of Tirana
  • 4Department of Geology, University of Patras
  • 5Department of Geophysics, University of Zagreb
  • 6Institute for Geoscieneces, Christian-Albrechts-Universität zu Kiel
  • 7Institute of Geophysics, Czech Academy of Sciences, Prague

The eastern Adriatic margin with the Dinarides and Hellenides orogens is one of the most hazardous areas in Europe from an earthquake hazard perspective in spite of only moderate shortening rates (e.g. less than 0.5 cm/yr across the Dinarides), as exemplified by the recent highly damaging earthquakes in Durrës, Albania (2019, M6.4) and Petrinja, Croatia (2020, M6.4). Deformation is both fairly localised on shallowly NE dipping thrust faults near the coast, and distributed, with a transition to spatially extended extensional deformation in the southern Dinarides and Northern Hellenides. and a complex regime involving strike-slip and obblique mechanisms in the eastern part of the Northern Dinarides. Making sense of this distributed deformation requires highly accurate locations both horizontally and in depth, which can only be achieved with dense seismic observations.

This region is thus being explored with multi-scale dense seismic deployments. On one hand, the multi-national AdriaArray initiative has combined temporary and permanent broadband stations to achieve a nearly-uniform coverage with typical inter-station distances of 30-40 km. In Albania, where the transition of the Dinarides to the Hellenides is occurring, this regional coverage is complemented by a ultra-dense deployment of nearly 400 stations (mostly geophones with a few broadband sensors) with a nominal spacing of 5 km, which was later rearranged into three orogen-perpendicular profiles, and one along-strike profile with 1 km station spacing. Such large numbers of stations require automated processing approaches leveraging recently developed machine learning-based techniques. The presentation will review the tectonic context for these surveys and share some preliminary results from these deployments as well as an earlier more localised deployment in the area of the Durrës earthquake.

How to cite: Tilmann, F., Rietbrock, A., Schurr, B., Heit, B., Frietsch, M., Agurto-Detzel, H., Gao, Y.-J., Kufner, S.-K., Dushi, E., Rama, B., Koxhaj, D., Sindija, D., Petersen, G., Sokos, E., Faccenna, C., Meier, T., and Kolinský, P.: The potential of high density seismic arrays to elucidate distributed deformation in the Dinarides and Hellenides, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-19217,, 2024.