Local Seismic Events in the Area of Poland Based on Data from the PASSEQ 2006-2008 Experiment

Wolfram.Geissler [ at ] awi.de


PASSEQ 2006-2008 (Passive Seismic Experiment in TESZ; Wilde-Piórko et al. 2008) was the biggest passive seismic experiment carried out so far in the area of Central Europe (Poland, Germany, the Czech Republic and Lithuania). 196 seismic stations (including 49 broadband seismometers) worked simultaneously for over two years. During the experiment, multiple types of data recorders and seismometers were used, making the analysis more complex and time consuming. The dataset was unified and repaired to start the detection of local seismic events. Two different approaches for detection were applied for stations located in Poland. The first one used standard STA/LTA triggers (Carl Johnson’s STA/LTA algorithm) and grid search to classify and locate the events. The result was manually verified. The second approach used Real Time Recurrent Network (RTRN) detection (Wiszniowski et al. 2014). Both methods gave similar results, showing four previously unknown seismic events located in the Gulf of Gdansk area, situated in the southern Baltic Sea. In this paper we discuss both detection methods with their pros and cons (accuracy, efficiency, manual work required, scalability). We also show details of all detected and previously unknown events in the discussed area.

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DOI 10.1515/acgeo-2016-0091

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Polkowsi, M. , Plesiewicz, B. , Wiszniowski, J. , Wilde-Piorko, M. , Geissler, W. , Plomerová, J. , Grad, M. , Babuška, V. , Brückl, E. , Cyziene, J. , Czuba, W. , England, R. , Gaczynski, E. , Gazdova, R. , Gregersen, S. , Guterch, A. , Hanka, W. , Hegedüs, E. , Heuer, B. , Jedlicka, P. , Lazauskiene, J. , Keller, R. , Kind, R. , Klinge, K. , Kolinsky, P. , Komminaho, K. , Kozlovskaya, E. , Krüger, F. , Larsen, T. , Majdanski, M. , Malek, J. , Motuza, G. , Novotny, O. , Pietrasiak, R. , Plenefisch, T. , Ruzek, B. , Sliaupa, S. , Sroda, P. , Swieczak, M. , Tiira, T. , Voss, P. and Wiejacz, P. (2016): Local Seismic Events in the Area of Poland Based on Data from the PASSEQ 2006-2008 Experiment , Acta Geophysica, 64 (6), pp. 2092-2113 . doi: 10.1515/acgeo-2016-0091

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