EGU21-859
https://doi.org/10.5194/egusphere-egu21-859
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Visualizing the Seismic Wavefield with AlpArray

On Ki Angel Ling1, Simon Stähler1, Domenico Giardini1, and the AlpArray Working Group2
On Ki Angel Ling et al.
  • 1ETH Zürich, Geophysics, Earth Sciences, Zurich, Switzerland (angel.ling@erdw.ethz.ch)
  • 2www.alparray.ethz.ch

The AlpArray Seismic Network (AASN) is a large-scale multidisciplinary seismic network in Europe that consists of over 600 3-component (3C) broadband stations with mean inter-station distance of 30-40km. This dense array allows the recording of the seismic wave propagation of distant earthquakes at a resolution of typical body and surface waves.

By animating the spatially-dense seismic recordings of the AASN, we can visualize seismic waves propagating across the European Alps as a function of space and time. Our 3C ground motion animations illustrate the full spatial-temporal evolution of global body and surface waves and demonstrates how a dense array allows the transformation from translation measurements at single stations to spatial gradients of the wavefield at the surface, capturing both small- and large-scale wave propagation phenomena. The addition of travel-time estimation, ray path illustration, and array-specific information such as slowness vector of incoming waves facilitate identification of seismic phases and their arrival-angle deviations. We will highlight some interesting observations of different seismic wave types in the animations of a few example teleseismic events during the course of the AASN between 2016-2019. Application for future research and education will also be discussed.

How to cite: Ling, O. K. A., Stähler, S., Giardini, D., and Group, T. A. W.: Visualizing the Seismic Wavefield with AlpArray, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-859, https://doi.org/10.5194/egusphere-egu21-859, 2021.

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