Jiri Zahradnik

Professor of Geophysics

 

Charles University in Prague, Faculty of Mathematics and Physics, Department of Geophysics.
Mail address: KG MFF UK, V Holesovičkách 2, 180 00 Praha 8, Czech Republic
Phone: (+420-2) 2191 2546
E-mail: jz@karel.troja.mff.cuni.cz

Orcid ID: http://orcid.org/0000-0002-1307-2957

Scopus Author ID: 7005627365      Researcher ID: P-9682-2016

 

 

Software:

·        ISOLA code to calculate centroid moment tensors and multiple-point source models

The most recent updates (2020):   http://geo.mff.cuni.cz/~jz/for_ISOLAnews/ 

Publications (status November 2020):

  • 100 papers in reviewed journals (WoS)
  • 1383 citations (WoS, without self-citations)
  • H-index: 24 (WoS) 

Personal data and positions held:

·        Born June 11, 1947 in Prague; Czech nationality

·        1966-1970: Studies at the Faculty of Mathematics and Physics, Charles University Prague

·        1970: RNDr degree (equivalent to MSc)

·        1976: CSc degree (equivalent to PhD)

·        2001: DrSc degree

·        1970: Research assistant

·        1975: Assistant professor

·        1992: Associate professor

·        1993-2006: Head of the Department of Geophysics

·        2006-2010: Vice-Head of the Department of Geophysics

·        2006- present: Professor of Geophysics

Award:

2018: The Ernst Mach Honorary Medal for Merit in the Physical Sciences (Czech Academy of Sciences)

 

Papers (after 2005):

 

These items may be protected by copyright. Use of these items is limited to non-profit, non-commercial, educational and research purposes. They are for download, not for redistribution.

 

2020

·        Hicks, S., Okuwaki, R., Steinberg, A., Rychert, C., Harmon, N., Abercrombie, R., Bogiaztis, P., Schlaphorst, D., Zahradnik, J., Kendall, J.-M., Yagi, Y., Shimizu, K., and Sudhaus, H. (2020). Back-propagating supershear rupture in the 2016 Mw 7.1 Romanche transform fault earthquake. Nature Geoscience, https://doi.org/10.1038/s41561-020-0619-9.  PDF

·        Gallovič, F., Zahradník, J., Plicka, V., Sokos, E., Evangelidis, Ch., Fountoulakis, I., Turhan, F. (2020). Complex rupture dynamics on an immature fault during the 2020 Mw 6.8 Elazig earthquake, Turkey. Commun. Earth Environ, 1, 40, https://doi: 10.1038/s43247-020-00038-x. PDF   Supplement

·        Haddad, A., Alcanie, M., Zahradník, J., Lazar, M., Antunes, V., Gasperini, L., et al. (2020). Tectonics of the Dead Sea fault driving the July 2018 seismic swarm in the Sea of Galilee (Lake Kinneret), Israel. J. Geophys. Res.: Solid Earth, 125, e2019JB018963. https://doi.org/10.1029/2019JB018963 PDF

·        Antunes, V., T. Planes, J. Zahradník, A. Obermann, C. Alvizuri, A. Carrier, M. Lupi (2020). Seismotectonics and 1D velocity model of the Greater Geneva Basin, France-Switzerland. Geophys. J. Int. 221 (3), 2026–2047, https://doi.org/10.1093/gji/ggaa129. PDF

·        Čížková, H., J. Zahradník, Junqing Liu, C. R. Bina (2020). Geodynamic subduction models constrained by deep earthquakes beneath the Japan Sea and eastern China. Sci. Rep. 10:5440  https://doi.org/10.1038/s41598-020-62238-x. PDF

·        Liu, J., and Zahradník, J. (2020). The 2019 MW 5.7 Changning earthquake, Sichuan Basin,China: A shallow doublet with different faulting styles. Geophys. Res. Lett., 47, e2019GL085408. https://doi.org/10.1029/2019GL085408 PDF

·        Carvalho, J. M., L. V. Barros, J. Zahradník, M. G. Von Huelsen, V. M. Ferreira (2020). Earthquake relocation, focal mechanism and stress field determination in central Brazil. J. South Am. Earth Sci.  97, 102411, 1-12,  https://doi.org/10.1016/j.jsames.2019.102411   PDF

·        Sokos, E., F. Gallovič, C. P. Evangelidis, A. Serpetsidaki, V. Plicka, J. Kostelecký, and J. Zahradník (2020). The 2018 Mw 6.8 Zakynthos, Greece, Earthquake: Dominant Strike-Slip Faulting near Subducting Slab, Seism. Res. Lett. 91, 721-732, https://doi.org/10.1785/0220190169 PDF  PDF-Suppl

 

2019

·        Carvalho, J., L. V. Barros, and J. Zahradnik (2019). Inversion for focal mechanisms using waveform envelopes and inaccurate velocity models: Examples from Brazil. Bull. Seism. Soc. Am., 109, 138-151, https://doi.org/10.1785/0120180119 PDF

 

2018

·        Zahradník, J., E. Sokos, V. Plicka (2018). Zakynthos 25/10/2018, Mw 6.8 earthquake: Superposition of strike-slip and thrust? Report to EMSC. PDF

·        Liu J, Li L., Zahradník J, Sokos E, Liu C., Tian X. (2018). North Korea’s 2017 test and its nontectonic aftershock. Geophys. Res. Lett. 45, 3017-3025, https://doi.org/10.1002/2018GL077095 PDF Supplement

·        Junqing Liu, Li Li, Jiří Zahradník, Efthimios Sokos, Vladimír Plicka; Generalized Source Model of the North Korea Tests 2009–2017. Seismological Research Letters ; 89 (6): 2166–2173. doi: Liu, J., L. Li, J. Zahradník, E. Sokos, V. Plicka (2018). Generalized Source Model of the North Korea Tests 2009–2017. Seis. Res. Lett. 89(6), 2166–2173. doi: https://doi.org/10.1785/0220180106  PDF Supplement

·        Matos, C., Custódio, S., Batlló, J., Zahradník, J., Arroucau, P., Silveira, G., & Heimann, S. (2018). An active seismic zone in intraplate west Iberia inferred from high-resolution geophysical data. J. Geophys. Res. (Solid Earth), 123, 2885–2907, https://doi.org/10.1002/2017JB015114  PDF

·        Bollini, C., N. Sabbione, V. Plicka, J. Zahradník (2018). Low-parametric modeling of the 2015, Mw 8.3 Illapel, Chile earthquake. J. South Am. Earth Sci. 88, 144-156, https://doi.org/10.1016/j.jsames.2018.08.006 PDF

·        Ezzelarab, M., M. O. Ebraheem, J. Zahradník (2018). A recent Mw 4.3 earthquake proving activity of a shallow strike-slip fault in the northern part of the Western Desert, Egypt. Journal of African Earth Sciences, 139, 275-282.  PDF

·        Zahradník, J. and E. Sokos (2018). Fitting waveform envelopes to derive focal mechanisms of moderate earthquakes. Seismol. Res. Lett. 89, 1137-1145. doi:10.1785/0220170161 PDF

·        Zahradník, J., and E. Sokos (2018). ISOLA code for multiple-point source modeling –review. In: “Moment Tensor Solutions - A Useful Tool for Seismotectonics” (S. D'Amico, Ed.), Springer. PDF

·        Turhan, F., M.D. Cambaz, and J. Zahradník (2018). The significance of the crustal velocity model in moment tensor solutions: A case study of Yedisu earthquakes. In: “Moment Tensor Solutions - A Useful Tool for Seismotectonics” (S. D'Amico, Ed.), Springer. PDF

 

 2017

·        Sokos, E., and J. Zahradník (2017). Lesvos June 12, 2017, Mw 6.3 event, a quick study of the source. PDF

·       Vackář, J., J. Burjánek, F. Gallovič, J. Zahradník, and J. Clinton (2017). Bayesian ISOLA: new tool for automated centroid moment tensor inversion. Geophys. J. Int., 210, 693–705. PDF

·       González, O'Leary, V. Clouard, and J. Zahradnik (2017). Moment tensor solutions along the central Lesser Antilles using regional broadband stations. Tectonophysics, 717, 214–225. PDF

·       Zahradník, J.,  H. Čížková, C.R. Bina, E. Sokos, J. Janský, H. Tavera, J. Carvalho (2017). A recent deep earthquake doublet in light of long-term evolution of Nazca subduction. Sci. Rep., 7, 45153; doi: 10.1038/srep45153  PDF Supplement

 

2016

·        Křížová, D., Zahradník, J., Kiratzi, A. (2016). Possible indicator of a strong isotropic earthquake component: Example of two shallow earthquakes in Greece. Bull. Seism. Soc. Am., 106, 2784-2795. PDF

·        Dias, F., J. Zahradník, and M. Assumpcao (2016). Path-specific, dispersion-based velocity models and moment tensors of moderate events recorded at few distant stations: Examples from Brazil and Greece.  Journal of South American Earth Sciences, 71, 344-358 PDF  Supplement

·        Villegas, R., Zahradnik, J., Nacif, S., Spagnotto, S., Winocur, D., and Leiva, F. (2016). Waveform inversion and focal mechanisms of two weak earthquakes in Cordillera Principal (Argentina) between 35° and 35.5° S, Journal of South American Earth Sciences, 71, 359-369; doi: 10.1016/j.jsames.2015.12.001. PDF

·        Carvalho, J., L.V. Barros, and J. Zahradník (2016). Focal mechanisms and moment magnitudes of micro-earthquakes in central Brazil by waveform inversion with quality assessment and inference of the local stress field. Journal of South American Earth Sciences, 71, 333-343. PDF

·        Triantafyllis,  N., E. Sokos, A. Ilias, and J. Zahradník (2016).  Scisola: Automatic Moment Tensor Solution for SeisComP3. Seismological Research Letters, 87, 157-163; doi:10.1785/0220150065. PDF

·        Sokos, E., J. Zahradník, F. Gallovič, A. Serpetsidaki, V. Plicka, and A. Kiratzi (2016). Asperity break after 12 years: The Mw6.4 2015 Lefkada (Greece) earthquake.  Geophys. Res. Lett., 43, 6137–6145; doi:10.1002/2016GL069427.   PDF   Supplement

·          Fojtíková, L., M. Kristeková, J. Málek, E. Sokos, K. Csicsay, J. Zahradník (2016), Quantifying capability of a local seismic network in terms of locations and focal mechanism solutions of weak earthquakes. J. of Seismology, 20, 93-106; doi 10.1007/s10950-015-9512-1. PDF

 

2015

·          Zahradník, J., L. Fojtíková, J. Carvalho, L.V. Barros, E. Sokos, J. Janský (2015). Compromising polarity and waveform constraints in focal-mechanism solutions; the Mara Rosa 2010 Mw 4 central Brazil earthquake revisited. Journal of South American Earth Sciences, 63,  323-333. PDF

·          Vackář J., J. Burjánek, and J. Zahradník (2015). Automated detection of disturbances in seismic records; MouseTrap code. Seism. Res. Letters, 86, 442-450. PDF

·          Sokos, E., A. Kiratzi, F. Gallovič, J. Zahradník, A. Serpetsidaki, V. Plicka, J. Janský, J. Kostelecký, G.-A. Tselentis (2015). Rupture process of the 2014 Cephalonia, Greece, earthquake doublet (Mw6) as inferred from regional and local seismic data. Tectonophysics 656, 131-141. PDF and suppl

·          Zahradník, J., J. Janský, V. Plicka (2015). Analysis of the source scanning algorithm with a new P-wave picker. J Seismol  19, 423–441. PDF  and Animations

 

2014

·          Fojtíková, L., and J. Zahradník (2014). A new strategy for weak events in sparse networks: the first-motion polarity solutions constrained by single-station waveform inversion. Seism. Res. Letters  85, 1265-1274; doi: 10.1785/0220140072. PDF

·          Quintero, R., J. Zahradník, and  E. Sokos (2014). Near-regional CMT and multiple-point source solution of the September 5, 2012, Nicoya, Costa Rica Mw 7.6 (GCMT) earthquake. Journal of South American Earth Sciences 55, 155-165.  PDF

·        Plicka, V., and J. Zahradnik (2014). Inverting full waveforms into 1D seismic velocity model of the upper crust by neighborhood algorithm - Corinth Gulf, Greece. Stud. Geophys. Geod. 58, 388--402, doi: 10.1007/s11200-013-0371-3. PDF

·        Zahradnik, J., and E. Sokos (2014). The Mw 7.1 Van, Eastern Turkey, earthquake 2011 – two-point source modeling by iterative deconvolution and nonnegative least squares. Geoph. J. Int. 196, 522-538. PDF

·        Vackář, J., J. Zahradník, and E. Sokos (2014). Strong fast long-period waves in the Efpalio 2010 earthquake records: explanation in terms of leaking modes. J. of Seismology 18, 81-91. PDF supp1 supp2

 

2013

·        Gallovič, F., G. Ameri, J. Zahradník, J. Janský, V. Plicka, E. Sokos, A. Askan, and M. Pakzad (2013). Fault Process and Broadband Ground-Motion Simulations of the 23 October 2011 Van (Eastern Turkey) Earthquake. Bull. Seism. Soc. Am. 103, 3164–3178. PDF

·        Křížová, D., J. Zahradník, and A. Kiratzi (2013). Resolvability of isotropic component in regional seismic moment tensor inversion. Bull. Seism. Soc. Am. 103, 2460-2473. PDF

·        Sokos, E. and J. Zahradník (2013). Evaluating centroid moment tensor uncertainty in new version of ISOLA software.  Seismol. Res. Letters  84, 656-665. PDF

 

2012 and before

·        Zahradník, J. and S. Custódio (2012). Moment tensor resolvability: Application to Southwest Iberia. Bull. Seism. Soc. Am., 102, 1235-1254. PDF

·        Gallovič, F. and J. Zahradník (2012). Complexity of the Mw6.3 2009 L’Aquila (Central Italy) earthquake: 1. Multiple finite-extent source inversion. J. Geophys. Res. 117, B04307. PDF

·        Sokos, E., J. Zahradník, A. Kiratzi, J. Janský, F. Gallovič, O. Novotný, J. Kostelecký, A. Serpetsidaki, and G-A. Tselentis (2012). The January 2010 Efpalio earthquake sequence in the western Corinth Gulf (Greece). Tectonophysics, 530-531, 299-309.  PDF

·        Janský, J.,  O. Novotný, V. Plicka,  J. Zahradník, and E. Sokos (2012). Earthquake location from P-arrival times only: problems and some solutions. Studia Geophysica et Geodaetica 56, 553-566. PDF

·        Zahradník, J., and E. Sokos (2011). Multiple-point source solution of the Mw7.2 Van earthquake, October 23, 2011, Eastern Turkey. Report to EMSC. http://www.emsc-csem.org/Files/event/239856/Van_ISOLA.pdf

·        Zahradnik, J., Gallovic, F.,  Sokos, E., and  Tselentis, G-A (2011). Preliminary slip model of M9 Tohoku earthquake from strong-motion stations in Japan - an extreme application of ISOLA code. Report to EMSC. http://www.emsc-csem.org/Files/event/211414/ISOLA_Report_tohoku.pdf

·        Gallovič, F., Zahradník, J.  (2011). Toward understanding slip-inversion uncertainty and artifacts II: singular value analysis. J. Geophys. Res., 116, B02309.  PDF  and  Supplemental material. PDF

·        Zahradník, J., Gallovič, F. (2010): Toward understanding slip-inversion uncertainty and artifacts. J. Geophys. Res. 115, B09310, 2010. PDF

·        Zahradník, J., Plešinger, A. (2010). Toward understanding subtle instrumentation effects associated with weak seismic events in the near field. Bull. Seism. Soc. Am. 100, 59-73. PDF

·        Serpetsidaki, A., Sokos, E., Tselentis, G.-A., Zahradnik, J. (2010). Seismic sequence near Zakynthos Island, Greece, April 2006: Identification of the activated fault plane. Tectonophysics 480, 23-32. PDF

·        Gallovič, F., Zahradník, J., Křížová, D., Plicka, V., Sokos, E., Serpetsidaki, A., Tselentis, G-A. (2009). From Earthquake Centroid to Spatial-Temporal Rupture Evolution: Mw 6.3 Movri Mountain earthquake, June 8, 2008, Greece. Geoph. Res. Lett. 36, L21310. PDF;  Appendix PDF

·        Janský, J,, Zahradník, J., Plicka, V. (2009).  Efficiency of individual CRL stations in seismic monitoring of the Western Gulf of Corinth. Acta Geodyn. Geomater., 6, 1-8, 2009. PDF

·        Janský, J., Zahradník, J., Plicka, V. (2009). Shallow earthquakes: shallower than expected? Stud. Geophys. Geod., 53 (2009), 261-268 (a non-reviewed article). PDF

·        Adamová, P., Sokos E., Zahradník, J. (2009). Problematic non-double-couple mechanism of the Amfilochia Mw5 earthquake, Western Greece, J. Seismology., 13, 1-12. PDF

·        Zahradník, J., Gallovič, F., Sokos,  E., Serpetsidaki, A.,  Tselentis, G-A. (2008). Quick fault-plane identification by a geometrical method: application to the Mw6.2 Leonidio earthquake, January 6, 2008, Greece. Seismol. Res. Letters 79, 653-662. PDF

·        Zahradník, J., Sokos, E., Tselentis, G.-A., Martakis, N. (2008). Non-double-couple mechanism of moderate earthquakes near Zakynthos, April 2006, explanation in terms of complexity, Geophys. Prosp.  56, 341-356. PDF

·        Zahradník J., Janský J., Plicka V. (2008). Detailed waveform inversion for moment tensors of M~4 events; examples from the Corinth Gulf, Greece, Bull. Seism. Soc. Am., 98, 2756-2771. PDF

·        Sokos, E. Zahradník, J., (2008). ISOLA a Fortran code and a Matlab GUI to perform multiple-point source inversion of seismic data, Computers and Geosciences, 34, 967-977. PDF

·        Burjánek, J., Zahradník, J. (2007). Dynamic stress field of a kinematic earthquake source model with k-squared slip distribution, Geophys. J. Int. 171, 1082-1097. PDF

·        Bernard P., Lyon-Caen H., Briole P., Deschamps A., Boudin F., Makropoulos K., Papadimitriou P., Lemeille F., Patau L., Billiris J., Paradissis D., Papazissi K., Castarède H., Charade O., Nercessian A., Avallone A., Pacchiani F., Zahradnik J., Sacks S., Linde A. (2006). Seismicity, deformation and seismic hazard in the western rift of Corinth: New insights from the Corinth Rift Laboratory (CRL). Tectonophysics, 426, 7-30. PDF

·        Zahradník, J., Plešinger, A., (2005). Long-period pulses in broadband records of near earthquakes Bul. Seism. Soc. Am., Vol. 95, No. 5, 1928-1939. PDF

·        Zahradník, J., Serpetsidaki, A., Sokos, E., Tselentis, G-A., (2005). Iterative deconvolution of regional waveforms and a double-event interpretation of the 2003 Lefkada earthquake, Greece. Bull. Seism. Soc. Am., Vol. 95, No. 1, 159-172. PDF

Visits abroad:

·        Long: Soviet Union 1976, Peru 1982, Canada  1984, 1989, 1991

·        Short: Sweden, Costa Rica, Colombia, Brazil, Greece, Cuba

Membership:

·        Member of the Scientific Council of the Geophys. Inst. Acad. Sci. Czech Rep. (1993-2001)

·        Member of the Institution Council of the Geophys. Inst. Acad. Sci. Czech Rep. (2008-2016)

·        Member of the Evaluation panel P210 of the Grant Agency of the Czech Rep. (2009-2013)

·        Member of the Scientific Council of the Faculty of Mathematics and Physics (2005-2012)

·        Remote referee of the European Research Council (2007-2010)

·        Vice-President of the European Seismological Commission (2004-2006)

·        Journal of Seismology  (associate editor 2002-2017, editorial board member 2017-present)

Teaching in Prague:

·        In Prague 1970-2002: Introduction to geophysics. Internal constitution of the Earth. Numerical methods in geophysics. Seismology. Physics of the seismic source. Numerical prediction of earthquake ground motions. Physics of the Earth (for the Faculty of Science). Seismic seminar.

·        In Prague 2002-present: Seismology I and II, Seismic seminar

Teaching abroad (invited):

  • Intensive course in Costa Rica on waveform inversion for 15 participants from Central and South America, (Sep. 3-9, 2011)  
  • Intensive course in Bogota – training in ISOLA software - for 16 students from Colombia (Sep 3 - Oct 4, 2013)
  • International training course in full waveform inversion for moment tensors and multiple source models (ISOLA code)’ for 21 participants from 7 countries of Latin America, Dec 2 to 11, 2013 – Brasília/Brazil
  • International training course  ‘Teoría y práctica de inversión de ondas sísmicas para calcular el tensor de  momento, utilizando una versión actualizada de ISOLA’,  for 26 participants from 12 countries of Latin America, 13.-18.6.2016, Costa Rica
  • ISOLA training course, December 3-12, 2018, Santiago de Cuba
  • “Waveform Inversion for Moment Tensor – ISOLA Course” (as a part of the University of Brasilia/2020 Winter Couse (V)), 89 registered participants from 13 countries of Latin America; on-line; November 16-20, 2020.

Research interests:

Numerical methods in seismic wave propagation (the finite-difference method). Seismic site effects, international blind prediction experiments. Seismic source parameter retrieval. Modeling finite-extent seismic sources. Strong-ground motion simulation. Operation of seismic stations and data analysis.

Research projects:

  • 1995-1998 NATO, GR-COAL project (leader of the Prague team)
  • 1997-1999 Inco-Copernicus ISMOD project (leader of the Prague team)
  • 2000-2003 EC project PRESAP (responsible for a work package and leader of the Prague team)
  • 2005-2006 EC project 3HAZ-CORINTH (leader of the Prague team)
  • 2003-2005 EC FP6 project MAGMA, Prague Centre of Mathematical Geophysics, Meteorology, and their Applications, (project coordinator)
  • A number of national projects of various grant agencies: GACR, GAUK, MSMT
  • 1997-present building seismic stations of the Charles University in Greece (in co-operation with the University of Patras)

My former students:

Ph.D.: J. Vackář 2018, D. Křížová 2017, A. Caserta (Italy) 2011, J. Burjánek 2007, V. Plicka 2003, I. Opršal 2001

Ph.D. (co-supervised): J. M. de Carvalho (Brazil) 2019

M.Sc.: J. Vackář 2012, D. Červinková 2008, P. Adamová 2006, K. Řezba 2005, J. Burjánek 2002, O. Smrž 2001, P.Kalianko 1999, I. Opršal 1996, V. Plicka 1995, Z. Schenková 1994, J. Chroust 1993, T. Semerák 1992,

M. Staša 1990, J. Fidler 1989, O. Tauferová, 1987,  P. Roušar 1987, J. Málek 1986, P. Kolář 1986, O. Čadek 1984, I. Hrkal 1984, L. Holub 1983, J. Kupka 1983, V. Barták 1982, P. Čenčík 1977, V. Pech 1975, P. Včelák 1975.

B.Sc.: J. Vackář 2010, D. Červinková 2006. Years of graduation are listed.