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1. AdriaArray seismic network – status in June 2023

Author

Meier, Thomas and Kolinsky, Petr

Abstract

With the advent of plate tectonics in the last century, our understanding of the geological evolution of the Earth system improved essentially. The internal deformation and evolution of tectonic plates remain however poorly understood. This holds in particular for the Central Mediterranean: The formerly much larger Adriatic plate is recently consumed in tectonically active belts spanning at its western margin from Sicily, over the Apennines to the Alps and at its eastern margin from the Hellenides, Dinarides towards the Alps. It has been shown that data acquired by dense, regional seismic networks like AlpArray provide crucial information on seismically active faults as well as on the structure and deformation of the lithosphere. The Adriatic Plate and in particular its eastern margin have however not been covered by a homogeneous seismic network yet.Here we report on the status of AdriaArray – a seismic experiment to cover the Adriatic Plate and its actively deforming margins by a dense broad-band seismic network. Within the AdriaArray region, currently about 990 permanent broad-band stations are operated by more than 40 institutions. In addition, 414 temporary stations from 24 mobile pools are deployed in the region achieving a coverage with an average station distance of 50 – 55km. The experiment is based on intense cooperation between local network operators, mobile pool operators, field teams, and ORFEUS. Altogether, more than 50 institutions are participating in the AdriaArray experiment. We will report on the time schedule, participating institutions, mobile station pools, and maps of temporary station distribution. &nbsp, The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)

Published
2023

5. Arrival angles of teleseismic fundamental mode Rayleigh waves across the AlpArray

Author

Kolinsky, Petr, Bokelmann, Götz, Hetenyi, Gyorgy, Abreu, Rafael, Allegretti, Ivo, Apoloner, Maria-Theresia, Aubert, Coralie, Besancon, Simon, Bes De Berc, Maxime, Bokelmann, Goetz, Brunel, Didier, Capello, Marco, Carman, Martina, Cavaliere, Adriano, Cheze, Jerome, Chiarabba, Claudio, Clinton, John, Cougoulat, Glenn, Grawford, Wayne C., Cristiano, Luigia, Czifra, Tibor, D'Alema, Ezio, Danesi, Stefania, Daniel, Romuald, Dannowski, Anke, Dasovic, Iva, Deschamps, Anne, Dessa, Jean-Xavier, Doubre, Cecile, Egdorf, Sven, Fiket, Tomislav, Fischer, Kasper, Friederich, Wolfgang, Fuchs, Florian, Funke, Sigward, Giardini, Domenico, Govoni, Aladino, Graczer, Zoltan, Groeschl, Gidera, Heimers, Stefan, Heit, Ben, Herak, Davorka, Herak, Marijan, Huber, Johann, Jaric, Dejan, Jedlicka, Petr, Jia, Yan, Jund, Helene, Kissling, Edi, Klingen, Stefan, Klotz, Bernhard, Kopp, Heidrun, Korn, Michael, Kotek, Josef, Kuhne, Lothar, Kuk, Kreso, Lange, Dietrich, Loos, Jürgen, Lovati, Sara, Malengros, Deny, Margheriti, Lucia, Maron, Christophe, Martin, Xavier, Massa, Marco, Mazzarini, Francesco, Meier, Thomas, Metral, Laurent, Molinari, Irene, Moretti, Milena, Nardi, Anna, Pahor, Jurij, Paul, Anne, Pequegnat, Catherine, Petersen, Daniel, Pesaresi, Damiano, Piccinini, Davide, Piromallo, Claudia, Plenefisch, Thomas, Plomerova, Jaroslava, Pondrelli, Silvia, Prevolnik, Snjezan, Racine, Roman, Regnier, Marc, Reiss, Miriam, Ritter, Joachim, Rumpker, Georg, Salimbeni, Simone, Santulin, Marco, Scherer, Werner, Schippkus, Sven, Schulte-Kortnack, Detlef, Sipka, Vesna, Solarino, Stefano, Spallarossa, Daniele, Spieker, Kathrin, Stipcevic, Josip, Strollo, Angelo, Sule, Balint, Szanyi, Gyongyver, Szucs, Eszter, Thomas, Christine, Thorwart, Martin, Tilmann, Frederik, Ueding, Stefan, Vallocchia, Massimiliano, Vecsey, Ludek, Voigt, Rene, Wassermann, Joachim, Weber, Zoltan, Weidle, Christian, Wesztergom, Viktor, Weyland, Gauthier, Wiemer, Stefan, Wolf, Felix, Wolyniec, David, Zieke, Thomas, Zivcic, Mladen, Zlebcikova, Helena, Institut für Meteorologie und Geophysik [Wien] (IMGW), Universität Wien, Austrian Science Fund (FWF)through project P 26391–AlpArray Austria and P 30707–AlpArrayAustria 2. The Python Toolbox ObsPy by Beyreuther et al. (2010)was used for data pre-processing. Maps were plotted using GenericMapping Tools by Wessel et al. (2013)., and University of Vienna [Vienna]

Subjects
Beamforming, Wave propagation, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Earth structure, engineering.material, 010502 geochemistry & geophysics, 01 natural sciences, symbols.namesake, Geochemistry and Petrology, Time-series analysis, Wave scattering and diffraction, Rayleigh wave, 0105 earth and related environmental sciences, Anomaly (natural sciences), Geodesy, Europe, Geophysics, Phase correlation, symbols, engineering, Structure of the Earth, Surface waves and free oscillations, Geology, Earthquake location, Gaussian beam
Abstract

International audience; The dense AlpArray network allows studying seismic wave propagation with high spatial resolution. Here we introduce an array approach to measure arrival angles of teleseismic Rayleigh waves. The approach combines the advantages of phase correlation as in the two-station method with array beamforming to obtain the phase-velocity vector. 20 earthquakes from the first two years of the AlpArray project are selected, and spatial patterns of arrival-angle deviations across the AlpArray are shown in maps, depending on period and earthquake location. The cause of these intriguing spatial patterns is discussed. A simple wave-propagation modelling example using an isolated anomaly and a Gaussian beam solution suggests that much of the complexity can be explained as a result of wave interference after passing a structural anomaly along the wave paths. This indicates that arrival-angle information constitutes useful additional information on the Earth structure, beyond what is currently used in inversions.

Published
2019
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6. The AlpArray seismic network

Author

Hetenyi, Gyorgy, Molinari, Irene, Clinton, John, Bokelmann, Gotz, Bondar, Istvan, Crawford, Wayne C., Dessa, Jean-Xavier, Doubre, Cecile, Friederich, Wolfgang, Fuchs, Florian, Giardini, Domenico, Graczer, Zoltan, Handy, Mark R., Herak, Marijan, Jia, Yan, Kissling, Edi, Kopp, Heidrun, Korn, Michael, Margheriti, Lucia, Meier, Thomas, Mucciarelli, Marco, Paul, Anne, Pesaresi, Damiano, Piromallo, Claudia, Plenefisch, Thomas, Plomerova, Jaroslava, Ritter, Joachim, Rumpker, Georg, Sipka, Vesna, Spallarossa, Daniele, Thomas, Christine, Tilmann, Frederik (Prof.), Wassermann, Joachim, Weber, Michael (Prof. Dr.), Weber, Zoltan, Wesztergom, Viktor, Zivcic, Mladen, Abreu, Rafael, Allegretti, Ivo, Apoloner, Maria-Theresia, Aubert, Coralie, Besancon, Simon, de Berc, Maxime Bes, Brunel, Didier, Capello, Marco, Carman, Martina, Cavaliere, Adriano, Cheze, Jerome, Chiarabba, Claudio, Cougoulat, Glenn, Cristiano, Luigia, Czifra, Tibor, Danesi, Stefania, Daniel, Romuald, Dannowski, Anke, Dasovic, Iva, Deschamps, Anne, Egdorf, Sven, Fiket, Tomislav, Fischer, Kasper, Funke, Sigward, Govoni, Aladino, Groschl, Gidera, Heimers, Stefan, Heit, Ben, Herak, Davorka, Huber, Johann, Jaric, Dejan, Jedlicka, Petr, Jund, Helene, Klingen, Stefan, Klotz, Bernhard, Kolinsky, Petr, Kotek, Josef, Kuhne, Lothar, Kuk, Kreso, Lange, Dietrich, Loos, Jurgen, Lovati, Sara, Malengros, Deny, Maron, Christophe, Martin, Xavier, Massa, Marco, Mazzarini, Francesco, Metral, Laurent, Moretti, Milena, Munzarova, Helena, Nardi, Anna, Pahor, Jurij, Pequegnat, Catherine, Petersen, Florian, Piccinini, Davide, Pondrelli, Silvia, Prevolnik, Snjezan, Racine, Roman, Regnier, Marc, Reiss, Miriam, Salimbeni, Simone, Santulin, Marco, Scherer, Werner, Schippkus, Sven, Schulte-Kortnack, Detlef, Solarino, Stefano, Spieker, Kathrin, Stipcevic, Josip, Strollo, Angelo, Sule, Balint, Szanyi, Gyongyver, Szucs, Eszter, Thorwart, Martin, Ueding, Stefan, Vallocchia, Massimiliano, Vecsey, Ludek, Voigt, Rene, Weidle, Christian, Weyland, Gauthier, Wiemer, Stefan, Wolf, Felix, Wolyniec, David, and Zieke, Thomas

Subjects
ddc:550, Institut für Geowissenschaften
Abstract

The AlpArray programme is a multinational, European consortium to advance our understanding of orogenesis and its relationship to mantle dynamics, plate reorganizations, surface processes and seismic hazard in the Alps-Apennines-Carpathians-Dinarides orogenic system. The AlpArray Seismic Network has been deployed with contributions from 36 institutions from 11 countries to map physical properties of the lithosphere and asthenosphere in 3D and thus to obtain new, high-resolution geophysical images of structures from the surface down to the base of the mantle transition zone. With over 600 broadband stations operated for 2 years, this seismic experiment is one of the largest simultaneously operated seismological networks in the academic domain, employing hexagonal coverage with station spacing at less than 52 km. This dense and regularly spaced experiment is made possible by the coordinated coeval deployment of temporary stations from numerous national pools, including ocean-bottom seismometers, which were funded by different national agencies. They combine with permanent networks, which also required the cooperation of many different operators. Together these stations ultimately fill coverage gaps. Following a short overview of previous large-scale seismological experiments in the Alpine region, we here present the goals, construction, deployment, characteristics and data management of the AlpArray Seismic Network, which will provide data that is expected to be unprecedented in quality to image the complex Alpine mountains at depth.

Published
2018

7. Ambient-noise tomography of the wider Vienna Basin region

Author

Schippkus, Sven, Zigone, Dimitri, Bokelmann, Götz, Hetenyi, György, Abreu, Rafael, Allegretti, Ivo, Apoloner, Maria-Theresia, Aubert, Coralie, Besancon, Simon, Bes de Berc, Maxime, Brunel, Didier, Capello, Marco, Carman, Martina, Cavaliere, Adriano, Cheze, Jerome, Chiarabba, Claudio, Clinton, John, Cougoulat, Glenn, Crawford, Wayne C., Cristiano, Luigia, Czifra, Tibor, D'Alema, Ezio, Danesi, Stefania, Daniel, Romuald, Dannowski, Anke, Dasovic, Iva, Deschamps, Anne, Dessa, Jean-Xavier, Doubre, Cecile, Egdorf, Sven, Fiket, Tomislav, Fischer, Kasper, Friederich, Wolfgang, Fuchs, Florian, Funke, Sigward, Giardini, Domenico, Govoni, Aladino, Graczer, Zoltan, Gröschl, Gidera, Heimers, Stefan, Heit, Ben, Herak, Davorka, Huber, Johann, Jaric, Dejan, Jedlicka, Petr, Jia, Yan, Jund, Helene, Kissling, Edi, Klingen, Stefan, Klotz, Bernhard, Kolinsky, Petr, Kopp, Heidrun, Korn, Michael, Kotek, Josef, Kühne, Lothar, Kuk, Kreso, Lange, Dietrich, Loos, Jürgen, Lovati, Sara, Malengros, Deny, Margheriti, Lucia, Maron, Christophe, Martin, Xavier, Massa, Marco, Mazzarini, Francesco, Meier, Thomas, Metral, Laurent, Molinari, Irene, Moretti, Milena, Munzarova, Helena, Nardi, Anna, Pahor, Jurij, Paul, Anne, Pequegnat, Catherine, Petersen, Daniel, Pesaresi, Damiano, Piccinini, Davide, Piromallo, Claudia, Plenefisch, Thomas, Plomerova, Jaroslava, Pondrelli, Silvia, Prevolnik, Snjezan, Racine, Roman, Regnier, Marc, Reiss, Miriam, Ritter, Joachim, Rümpker, Georg, Salimbeni, Simone, Santulin, Marco, Scherer, Werner, Schulte-Kortnack, Detlef, Sipka, Vesna, Solarino, Stefano, Spallarossa, Daniele, Spieker, Kathrin, Stipcevic, Josip, Strollo, Angelo, Süle, Balint, Szanyi, Gyöngyver, Szücs, Eszter, Thomas, Christine, Thorwart, Martin, Tilmann, Frederik, Ueding, Stefan, Vallocchia, Massimiliano, Vecsey, Ludek, Voigt, Rene, Wassermann, Joachim, Weber, Zoltan, Weidle, Christian, Wesztergom, Viktor, Weyland, Gauthier, Wiemer, Stefan, Wolf, Felix Noah, Wolyniec, David, Zieke, Thomas, Zivcic, Mladen, Institut für Meteorologie und Geophysik [Wien] (IMGW), Universität Wien, Sismologie (IPGS) (IPGS-Sismologie), Institut de physique du globe de Strasbourg (IPGS), and Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, Seismic noise, Wave propagation, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Seismic interferometry, Fault (geology), Crustal structure, 010502 geochemistry & geophysics, 01 natural sciences, Physics::Geophysics, symbols.namesake, Geochemistry and Petrology, Rayleigh wave, Dispersion (water waves), Crustal imaging, 0105 earth and related environmental sciences, geography, geography.geographical_feature_category, Seismic tomography, Tectonics, Geophysics, symbols, Seismology, Geology
Abstract

International audience; We present a new 3-D shear-velocity model for the top 30 km of the crust in the wider Vienna Basin region based on surface waves extracted from ambient-noise cross-correlations. We use continuous seismic records of 63 broad-band stations of the AlpArray project to retrieve interstation Green's functions from ambient-noise cross-correlations in the period range from 5 to 25 s. From these Green's functions, we measure Rayleigh group traveltimes, utilizing all four components of the cross-correlation tensor, which are associated with Rayleigh waves (ZZ, RR, RZ and ZR), to exploit multiple measurements per station pair. A set of selection criteria is applied to ensure that we use high-quality recordings of fundamental Rayleigh modes. We regionalize the interstation group velocities in a 5 km × 5 km grid with an average path density of ∼20 paths per cell. From the resulting group-velocity maps, we extract local 1-D dispersion curves for each cell and invert all cells independently to retrieve the crustal shear-velocity structure of the study area. The resulting model provides a previously unachieved lateral resolution of seismic velocities in the region of ∼15 km. As major features, we image the Vienna Basin and Little Hungarian Plain as low-velocity anomalies, and the Bohemian Massif with high velocities. The edges of these features are marked with prominent velocity contrasts correlated with faults, such as the Alpine Front and Vienna Basin transfer fault system. The observed structures correlate well with surface geology, gravitational anomalies and the few known crystalline basement depths from boreholes. For depths larger than those reached by boreholes, the new model allows new insight into the complex structure of the Vienna Basin and surrounding areas, including deep low-velocity zones, which we image with previously unachieved detail. This model may be used in the future to interpret the deeper structures and tectonic evolution of the wider Vienna Basin region, evaluate natural resources, model wave propagation and improve earthquake locations, among others.

Published
2018
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8. The AlpArray Seismic Network: A Large-Scale European Experiment to Image the Alpine Orogen

Author

Hetenyi, Gyorgy, Molinari, Irene, Clinton, John, Bokelmann, Gotz, Bondar, Istvan, Crawford, Wayne C., Dessa, Jean-xavier, Doubre, Cecile, Friederich, Wolfgang, Fuchs, Florian, Giardini, Domenico, Graczer, Zoltan, Handy, Mark R., Herak, Marijan, Jia, Yan, Kissling, Edi, Kopp, Heidrun, Korn, Michael, Margheriti, Lucia, Meier, Thomas, Mucciarelli, Marco, Paul, Anne, Pesaresi, Damiano, Piromallo, Claudia, Plenefisch, Thomas, Plomerova, Jaroslava, Ritter, Joachim, Rumpker, Georg, Sipka, Vesna, Spallarossa, Daniele, Thomas, Christine, Tilmann, Frederik, Wassermann, Joachim, Weber, Michael, Weber, Zoltan, Wesztergom, Viktor, Zivcic, Mladen, Abreu, Rafael, Allegretti, Ivo, Apoloner, Maria-theresia, Aubert, Coralie, Besancon, Simon, De Berc, Maxime Bes, Brunel, Didier, Capello, Marco, Carman, Martina, Cavaliere, Adriano, Cheze, Jerome, Chiarabba, Claudio, Cougoulat, Glenn, Cristiano, Luigia, Czifra, Tibor, D'Alema, Ezio, Danesi, Stefania, Daniel, Romuald, Dannowski, Anke, Dasovic, Iva, Deschamps, Anne, Egdorf, Sven, Fiket, Tomislav, Fischer, Kasper, Funke, Sigward, Govoni, Aladino, Groschl, Gidera, Heimers, Stefan, Heit, Ben, Herak, Davorka, Huber, Johann, Jaric, Dejan, Jedlicka, Petr, Jund, Helene, Klingen, Stefan, Klotz, Bernhard, Kolinsky, Petr, Kotek, Josef, Kuhne, Lothar, Kuk, Kreso, Lange, Dietrich, Loos, Jurgen, Lovati, Sara, Malengros, Deny, Maron, Christophe, Martin, Xavier, Massa, Marco, Mazzarini, Francesco, Metral, Laurent, Moretti, Milena, Munzarova, Helena, Nardi, Anna, Pahor, Jurij, Pequegnat, Catherine, Petersen, Florian, Piccinini, Davide, Pondrelli, Silvia, Prevolnik, Snjezan, Racine, Roman, Regnier, Marc, Reiss, Miriam, Salimbeni, Simone, Santulin, Marco, Scherer, Werner, Schippkus, Sven, Schulte-kortnack, Detlef, Solarino, Stefano, Spieker, Kathrin, Stipcevic, Josip, Strollo, Angelo, Sule, Balint, Szanyi, Gyongyver, Szucs, Eszter, Thorwart, Martin, Ueding, Stefan, Vallocchia, Massimiliano, Vecsey, Ludek, Voigt, Rene, Weidle, Christian, Weyland, Gauthier, Wiemer, Stefan, Wolf, Felix, Wolyniec, David, Zieke, Thomas, Hetenyi, Gyorgy, Molinari, Irene, Clinton, John, Bokelmann, Gotz, Bondar, Istvan, Crawford, Wayne C., Dessa, Jean-xavier, Doubre, Cecile, Friederich, Wolfgang, Fuchs, Florian, Giardini, Domenico, Graczer, Zoltan, Handy, Mark R., Herak, Marijan, Jia, Yan, Kissling, Edi, Kopp, Heidrun, Korn, Michael, Margheriti, Lucia, Meier, Thomas, Mucciarelli, Marco, Paul, Anne, Pesaresi, Damiano, Piromallo, Claudia, Plenefisch, Thomas, Plomerova, Jaroslava, Ritter, Joachim, Rumpker, Georg, Sipka, Vesna, Spallarossa, Daniele, Thomas, Christine, Tilmann, Frederik, Wassermann, Joachim, Weber, Michael, Weber, Zoltan, Wesztergom, Viktor, Zivcic, Mladen, Abreu, Rafael, Allegretti, Ivo, Apoloner, Maria-theresia, Aubert, Coralie, Besancon, Simon, De Berc, Maxime Bes, Brunel, Didier, Capello, Marco, Carman, Martina, Cavaliere, Adriano, Cheze, Jerome, Chiarabba, Claudio, Cougoulat, Glenn, Cristiano, Luigia, Czifra, Tibor, D'Alema, Ezio, Danesi, Stefania, Daniel, Romuald, Dannowski, Anke, Dasovic, Iva, Deschamps, Anne, Egdorf, Sven, Fiket, Tomislav, Fischer, Kasper, Funke, Sigward, Govoni, Aladino, Groschl, Gidera, Heimers, Stefan, Heit, Ben, Herak, Davorka, Huber, Johann, Jaric, Dejan, Jedlicka, Petr, Jund, Helene, Klingen, Stefan, Klotz, Bernhard, Kolinsky, Petr, Kotek, Josef, Kuhne, Lothar, Kuk, Kreso, Lange, Dietrich, Loos, Jurgen, Lovati, Sara, Malengros, Deny, Maron, Christophe, Martin, Xavier, Massa, Marco, Mazzarini, Francesco, Metral, Laurent, Moretti, Milena, Munzarova, Helena, Nardi, Anna, Pahor, Jurij, Pequegnat, Catherine, Petersen, Florian, Piccinini, Davide, Pondrelli, Silvia, Prevolnik, Snjezan, Racine, Roman, Regnier, Marc, Reiss, Miriam, Salimbeni, Simone, Santulin, Marco, Scherer, Werner, Schippkus, Sven, Schulte-kortnack, Detlef, Solarino, Stefano, Spieker, Kathrin, Stipcevic, Josip, Strollo, Angelo, Sule, Balint, Szanyi, Gyongyver, Szucs, Eszter, Thorwart, Martin, Ueding, Stefan, Vallocchia, Massimiliano, Vecsey, Ludek, Voigt, Rene, Weidle, Christian, Weyland, Gauthier, Wiemer, Stefan, Wolf, Felix, Wolyniec, David, and Zieke, Thomas

Abstract

The AlpArray programme is a multinational, European consortium to advance our understanding of orogenesis and its relationship to mantle dynamics, plate reorganizations, surface processes and seismic hazard in the Alps-Apennines-Carpathians-Dinarides orogenic system. The AlpArray Seismic Network has been deployed with contributions from 36 institutions from 11 countries to map physical properties of the lithosphere and asthenosphere in 3D and thus to obtain new, high-resolution geophysical images of structures from the surface down to the base of the mantle transition zone. With over 600 broadband stations operated for 2 years, this seismic experiment is one of the largest simultaneously operated seismological networks in the academic domain, employing hexagonal coverage with station spacing at less than 52 km. This dense and regularly spaced experiment is made possible by the coordinated coeval deployment of temporary stations from numerous national pools, including ocean-bottom seismometers, which were funded by different national agencies. They combine with permanent networks, which also required the cooperation of many different operators. Together these stations ultimately fill coverage gaps. Following a short overview of previous large-scale seismological experiments in the Alpine region, we here present the goals, construction, deployment, characteristics and data management of the AlpArray Seismic Network, which will provide data that is expected to be unprecedented in quality to image the complex Alpine mountains at depth.

Published
2018
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10. Local Seismic Events in the Area of Poland Based on Data from the PASSEQ 2006-2008 Experiment

Author

Polkowsi, Marcin, Plesiewicz, Beata, Wiszniowski, Jan, Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, Randy, Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Kozlovskaya, Elena, Krüger, Frank, Larsen, Tine, Majdanski, Mariusz, Malek, Jiri, Motuza, Gediminas, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, Voss, Peter, Wiejacz, Pawel, Polkowsi, Marcin, Plesiewicz, Beata, Wiszniowski, Jan, Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, Randy, Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Kozlovskaya, Elena, Krüger, Frank, Larsen, Tine, Majdanski, Mariusz, Malek, Jiri, Motuza, Gediminas, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, Voss, Peter, and Wiejacz, Pawel

Abstract

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.

Published
2016

11. Upper mantle structure around the Trans-European Suture Zone obtained by teleseismic tomography

Author

Janutyte, Ilma, Majdanski, Mariusz, Voss, Peter, Kozlovskaya, Elena, Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, G. R., Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Krüger, Frank, Larsen, Tine, Malek, Jiri, Motuza, Gediminas, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, Wiejacz, Pawel, Janutyte, Ilma, Majdanski, Mariusz, Voss, Peter, Kozlovskaya, Elena, Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, G. R., Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Krüger, Frank, Larsen, Tine, Malek, Jiri, Motuza, Gediminas, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, and Wiejacz, Pawel

Abstract

The presented study aims to resolve the upper mantle structure around the Trans-European Suture Zone (TESZ), which is the major tectonic boundary in Europe. The data of 183 temporary and permanent seismic stations operated during the period of the PASsive Seismic Experiment (PASSEQ) 2006–2008 within the study area from Germany to Lithuania was used to compile the data set of manually picked 6008 top-quality arrivals of P waves from teleseismic earthquakes. We used the TELINV nonlinear teleseismic tomography algorithm to perform the inversions. As a result, we obtain a model of P wave velocity variations up to about �3% with respect to the IASP91 velocity model in the upper mantle around the TESZ. The higher velocities to the east of the TESZ correspond to the older East European Craton (EEC), while the lower velocities to the west of the TESZ correspond to younger western Europe.We find that the seismic lithosphere–asthenosphere boundary (LAB) is more distinct beneath the Phanerozoic part of Europe than beneath the Precambrian part. To the west of the TESZ beneath the eastern part of the Bohemian Massif, the Sudetes Mountains and the Eger Rift, the negative anomalies are observed from a depth of at least 70 km, while under the Variscides the average depth of the seismic LAB is about 100 km.We do not observe the seismic LAB beneath the EEC, but beneath Lithuania we find the thickest lithosphere of about 300 km or more. Beneath the TESZ, the asthenosphere is at a depth of 150– 180 km, which is an intermediate value between that of the EEC and western Europe. The results imply that the seismic LAB in the northern part of the TESZ is in the shape of a ramp dipping to the northeasterly direction. In the southern part of the TESZ, the LAB is shallower, most probably due to younger tectonic settings. In the northern part of the TESZ we do not recognize any clear contact between Phanerozoic and Proterozoic Europe, but further to the south we may refer to a sharp and steep c

Published
2015

12. Traces of the crustal units and the upper-mantle structure in the southwestern part of the East European Craton

Author

Janutyte, Ilma, Kozlovskaya, Elena, Majdanski, Mariusz, Voss, Peter, Budraitis, M., Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, G. R., Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Krüger, Frank, Larsen, Tine, Malek, Jiri, Motuza, Gediminas, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, Wiejacz, Pawel, Janutyte, Ilma, Kozlovskaya, Elena, Majdanski, Mariusz, Voss, Peter, Budraitis, M., Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, G. R., Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Krüger, Frank, Larsen, Tine, Malek, Jiri, Motuza, Gediminas, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, and Wiejacz, Pawel

Abstract

The presented study is a part of the passive seismic experiment PASSEQ 2006–2008, which took place around the Trans-European Suture Zone (TESZ) from May 2006 to June 2008. The data set of 4195 manually picked arrivals of teleseismic P waves of 101 earthquakes (EQs) recorded in the seismic stations deployed to the east of the TESZ was inverted using the non-linear teleseismic tomography algorithm TELINV. Two 3-D crustal models were used to estimate the crustal travel time (TT) corrections. As a result, we obtain a model of P-wave velocity variations in the upper mantle beneath the TESZ and the East European Craton (EEC). In the study area beneath the craton, we observe up to 3% higher and beneath the TESZ about 2–3% lower seismic velocities compared to the IASP91 velocity model. We find the seismic lithosphere–asthenosphere boundary (LAB) beneath the TESZ at a depth of about 180 km, while we observe no seismic LAB beneath the EEC. The inversion results obtained with the real and the synthetic data sets indicate a ramp shape of the LAB in the northern TESZ, where we observe values of seismic velocities close to those of the craton down to about 150 km. The lithosphere thickness in the EEC increases going from the TESZ to the NE from about 180 km beneath Poland to 300 km or more beneath Lithuania. Moreover, in western Lithuania we find an indication of an uppermantle dome. In our results, the crustal units are not well resolved. There are no clear indications of the features in the upper mantle which could be related to the crustal units in the study area. On the other hand, at a depth of 120–150 km we indicate a trace of a boundary of proposed palaeosubduction zone between the East Lithuanian Domain (EL) and theWest Lithuanian Granulite Domain (WLG). Also, in our results, we may have identified two anorogenic granitoid plutons.

Published
2014

13. Study of Local Seismic Events in Lithuania and Adjacent Areas Using Data from the PASSEQ Experiment

Author

Janutyte, Ilma, Kozlovskaya, Elena, Motuza, Gediminas, Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, Randy, Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Krüger, Frank, Larsen, Tine, Majdanski, Mariusz, Malek, Jiri, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, Voss, Peter, Wiejacz, Pawel, Janutyte, Ilma, Kozlovskaya, Elena, Motuza, Gediminas, Wilde-Piorko, Monika, Geissler, Wolfram, Plomerová, Jarka, Grad, Marek, Babuška, Vladislav, Brückl, Ewald, Cyziene, Jolanta, Czuba, Wojciech, England, Richard, Gaczynski, Edward, Gazdova, Renata, Gregersen, Soren, Guterch, Aleksander, Hanka, Winfried, Hegedüs, Endre, Heuer, Barbara, Jedlicka, Petr, Lazauskiene, Jurga, Keller, Randy, Kind, Rainer, Klinge, Klaus, Kolinsky, Petr, Komminaho, Kari, Krüger, Frank, Larsen, Tine, Majdanski, Mariusz, Malek, Jiri, Novotny, Oldrich, Pietrasiak, Robert, Plenefisch, Thomas, Ruzek, Bohuslav, Sliaupa, Saulius, Sroda, Piotr, Swieczak, Marzena, Tiira, Timo, Voss, Peter, and Wiejacz, Pawel

Abstract

The territory of Lithuania and adjacent areas of the East European Craton have always been considered a region of low seismicity. Two recent earthquakes with magnitudes of more than 5 in the Kaliningrad District (Russian Federation) on 21 September 2004 motivated re-evaluation of the seismic hazard in Lithuania and adjacent territories. A new opportunity to study seismicity in the region is provided by the PASSEQ (Pasive Seismic Experiment) project that aimed to study the lithosphere–asthenosphere structure around the Trans-European Suture Zone. Twenty-six seismic stations of the PASSEQ temporary seismic array were installed in the territory of Lithuania. The stations recorded a number of local and regional seismic events originating from Lithuania and adjacent areas. This data can be used to answer the question of whether there exist seismically active tectonic zones in Lithuania that could be potentially hazardous for critical industrial facilities. Therefore, the aim of this paper is to find any natural tectonic seismic events in Lithuania and to obtain more general view of seismicity in the region. In order to do this, we make a manual review of the continuous data recorded by the PASSEQ seismic stations in Lithuania. From the good quality data, we select and relocate 45 local seismic events using the well-known LocSAT and VELEST location algortithms. In order to discriminate between possible natural events, underwater explosions and on-shore blasts, we analyse spatial distribution of epicenters and temporal distribution of origin times and perform both visual analysis of waveforms and spectral analysis of recordings. We show that the relocated seismic events can be grouped into five clusters (groups) according to their epicenter coordinates and origin and that several seismic events might be of tectonic origin. We also show that several events from the off-shore region in the Baltic Sea (at the coasts of the Kaliningrad District of the Russian Federation) are n

Published
2013

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