EGU22-8174, updated on 28 Mar 2022
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Moho depths beneath the European Alps from receiver functions of the AlpArray Seismic Network

Konstantinos Michailos1, Matteo Scarponi1,2, Josip Stipčević3, György Hetényi1, Katrin Hannemann4, Dániel Kalmár5, Stefan Mroczek6, Anne Paul7,  Jaroslava Plomerová2, Frederik Tilmann6, Jerôme Vergne8, and the AlpArray Receiver Function Research Group AlpArray Working Group
Konstantinos Michailos et al.
  • 1University of Lausanne, Institute of Earth Sciences, Faculty of Geosciences and Environment, Lausanne, Switzerland
  • 2Department of Seismology of the Institute of Geophysics, Czech Academy of  sciences, Prague, Czechia
  • 3Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
  • 4Westfälische Wilhelms Universität Münster, Institut für Geophysik,  Münster, Germany
  • 5Kövesligethy Radó Seismological Observatory, Institute of Earth Physics and Space Science, Budapest, Hungary
  • 6Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Potsdam, Germany
  • 7Institut des Sciences de la Terre, Université Grenoble Alpes, France
  • 8Institut Terre & Environnement de Strasbourg, University of Strasbourg, France

The European Alps, formed by the interactions between the European and Adriatic plates, is a unique geological structure that has been extensively studied over the past decades. Despite numerous active and passive seismic investigations in the past, the crustal structure across the whole Alpine domain is somehow limited - mainly due to the limited number of seismometers available. The deployment of the AlpArray Seismic Network provides, which consisted of around 600 broadband seismometers and was operational from early 2016 till mid-2019, offers a unique opportunity to further update the current knowledge of the crustal structure beneath the European Alps by employing Receiver function (RF) analysis. 

RF method can provide an efficient way to image the structures and the discontinuities within the uppermost part of the Earth. We use teleseismic earthquakes with M≥5.5 and M<8.5 and epicentral distances ranging between 30 and 90 degrees that occurred during the operational time of the AlpArray Seismic Network. We compute RFs using a time-domain iterative deconvolution method. We apply quality control steps to both the original three-component waveforms and the calculated RFs to ensure that we only use high-quality signals. 

As of abstract submission, we are in the process of calculating the RFs. We also intend to perform a time to depth migration, in a 3D spherical coordinate system, to the RFs. This methodology, together with unprecedented data coverage, will provide us with migrated profiles that will image the structure of the crust and map the Moho depths at a great level of detail. 

How to cite: Michailos, K., Scarponi, M., Stipčević, J., Hetényi, G., Hannemann, K., Kalmár, D., Mroczek, S., Paul, A., Plomerová,  ., Tilmann, F., Vergne, J., and AlpArray Working Group, T. A. R. F. R. G.: Moho depths beneath the European Alps from receiver functions of the AlpArray Seismic Network, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8174,, 2022.


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