Distribution of Active Seismic Deformation in the Eastern Alps from the Recent Swath-D Experiment

The Swath-D network was a temporary seismic experiment nested within the AlpArray backbone network. Roughly 150 broadband stations were deployed across the Austrian-Italian border in the Eastern Alps during the second half of 2017, and were active to late 2019. This dense network provided an unprecedented resolution in a tectonically active region that is considered to play an important role in the evolution of the Alps. Extracting new information from this dataset turned out to be challenging due to the large volume of the dataset, low magnitude of the seismicity, and heterogeneity of the study area.

We applied waveform-based methods to detect, phase-pick, and relocate seismic events using data from the Swath-D network in the Eastern Alps. A GPU-accelerated template matching algorithm was developed in order to increase the number of detected earthquakes based on the previously known seismicity. Newly detected events were automatically picked using based on waveform similarity, and precisely relocated. This poster provides an overview of our results and the methods that we have applied.