Within my professional career I focus to the field of applied geophysics. The main reason is that I am curious about how the world is constructed. Everything started, similar to the others, during my childhood by disassembling the alarm clock. However, later on I was fascinated by the geophysics which helped to realize my child dreams and look into the secret internals of hills and valleys.
I have studied the Applied Geophysics on the Faculty of Science, Charles University and finished my Ph.D. studies there. Then I started to work at the Czech Academy of Sciences within the field of geophysics. Several years later I partially went back to the University to teach several courses there. As a reward, I highly benefit from curiosity of my students.
My main research interests is visualization of inner structure of volcanic edifices accompanied by application of geophysical methods within the field of geohazards and environmental and archaeological applications.
Dohnal, J., Jáně, Z., Valenta, J., Zima, L. (2000): Geofyzikální průzkum středověkého tvrziště u zaniklé vsi Mastnice, Castellologica bohemica, 7, Praha, 343–350.
Dohnal, J., Jáně, Z., Kněz, J., Valenta, J., Vilhelm, J. (2002): Hrad v Lysé nad Labem a výsledky geofyzikálního průzkumu v severní části zámeckého areálu, Castellologica bohemica, 8, Praha, 455–472.
Dohnal, J., Jáně, Z., Kněz, J., Valenta, J., Zima, L. (2002): Vstupní část hradu Litice nad Orlicí – výsledky geofyzikálního průzkumu, Castellologica bohemica, 8, Praha, 473–782.
Dohnal, J., Jáně, Z., Kněz, J., Valenta, J., Vilhelm, J., Zima, L. (2004): Hrad Nižbor – poznatky komplexního geofyzikálního průzkumu v letech 2000 – 2002, Castellologica bohemica, 9, Praha, 291–304.
Málek, J., Buben, J., Martínková, M., Novotný, O., Valenta, J., et al. (2005): Amplitude spectra of seismograms recorded in equal epicentral distances from blast in NW Bohemia, Acta Geophysica et Geomaterialia, vol. 2, No. 4 (140), 5–13.
Málek, J., Kolínský, P., Štrunc, J., Valenta, J. (2007): Generalized average of signals (GAS) – a new method for detection of very weak waves in seismograms. Acta Geodynamica et Geomaterialia, vol. 4, No. 3 (147), 5–10.
Valenta, J., Dohnal, J. (2007). 3D seismic travel time surveying – a comparison of the time-term method and tomography (an example from an archaeological site). Journal of Applied Geophysics, 63, 46–58.
Valenta, J., Stejskal, V., Štěpančíková, P. (2008): Tectonic pattern of the Hronov-Poříčí trough as seen from pole-dipole geoelectrical measurements. Acta Geodynamica et Geomaterialia, vol- 5, No. 2, 185–195.
Skácelová, Z., Rapprich, V., Valenta, J., Hartvich, F., Šrámek, J., Radoň, M., Gaždová, R., Nováková, L., Kolínský, P., Pécskay, Z. (2010). Geophysical research on structure of partly eroded maar volcanoes: Miocene Hnojnice and Oligocene Rychnov volcanoes (northern Czech Republic). Journal of Geosciences, 55, 299–311.
Gaždová, R., Novotný, O., Málek, J., Valenta, J., Brož M., Kolínský, P. (2011): Groundwater level variations in the seismically active region of Western Bohemia in the years 2005–2010, Acta Geodynamica et Geomaterialia, Volume 8, No. 1, 17–27.
Hartvich F., Valenta J. (2011): Identification of faults using morphostructural and geophysical methods – case study of the Strašín cave, Acta Geodynamica et Geomaterialia,vol. 8, No. 4, 425–441.
Valenta, J., Brož, M., Málek, J., Mlčoch, B., Rapprich, V., Skácelová, Z. and the Doupov Working Group (2011). Seismic model and geological interpretation of the basement beneath the Doupovské hory Volcanic Complex (NW Czech Republic). Acta Geophysica, vol. 59, no. 3, 597–617. DOI: 10.2478/s11600-011-0009-1
Kolínský, P., Valentaj, J., Gaždová, R. (2012) Seismicity, groundwater level variations and Earth tides in the Hronov-Poříčí Fault Zone, Czech Republic, Acta Geodynamica et Geomaterialia, vol. 9, No. 2, 191–209.
Stejskal V., Valenta J., Vilímek V. (2012) Using geomorphological and geophysical survey to research relations between landforms and joint tectonics in the Broumovská vrchovina (Czech Republic), Acta Universitatis Carolinae Geographica, 47, 1, 73–83.
Hartvich F., Valenta J. (2013) Tracing an intra-montane fault: an interdisciplinary approach. Surveys in Geophysics, 34, 3, 317–347.
Burda J., Hartvich F., Valenta J., Smítka V., Rybář J. (2013) Climate-induced landslide reactivation at the edge of the Most Basin (Czech Republic) – progress towards better landslide prediction. Natural Hazards and Earth System Sciences, 13, 361–374.
Valenta J., Rapprich V., Skácelová Z., Gaždová R., Fojtíková L. (2014) The newly discovered neogene maar volcano near the Mariánské Lázně, western Bohemia. Acta Geodynamica et Geomaterialia, vol. 11, no. 2., 107–116. DOI: 10.13168/AGG.2013.0061
Kolínský P., Valenta J., Málek J. (2014) Velocity model of the Hronov-Poříčí Fault Zone from Rayleigh wave dispersion. Journal of Seismology, 18, 617–635. DOI 10.1007/s10950-014-9433-4
Valenta J., Rapprich V., Stárková M., Skácelová Z., Fojtíková L., Staněk F., Balek J. (2014) Problems and challenges in detection of pre-Mesozoic maar volcanoes: example from the Principálek Volcano in the Permian Krkonoše Piedmont Basin. Journal of Geosciences, 59, 169–181.
Anikiev D., Valenta J., Staněk F., Eisner L. (2014) Joint location and source mechanism inversion of microseismic events: benchmarking on seismicity induced by hydraulic fracturing. Geophysical Journal International, 198, 249–258. doi: 10.1093/gji/ggu126
Gaždová R., Kolínský P., Vilhelm J., Valenta J. (2015) Combining surface waves and common methods for shallow geophysical survey. Near Surface Geophysics, 13, 19–32. doi:10.3997/1873-0604.2014039
Staněk F., Anikiev D., Valenta J. and Eisner L. (2015) Semblance for Microseismic Event Detection. Geophysical Journal International, 201, 1362–1369.
Špaček P., Valenta J., Tábořík P., Ambrož V., Urban M., Štěpančíková P. (2017) Fault slip versus slope deformations: Experience from paleoseismic trenches in the region with low slip-rate faults and strong Pleistocene periglacial mass wasting (Bohemian Massif). Quaternary International, 451, 56–73.
Rapprich V., Shields S., Halodová P., Lindline J., van Wyk de Vries B., Petronis M. S., Valenta J. (2017). Fingerprints of magma mingling processes within the Miocene Zebín tuff cone feeding system (Jičín Volcanic Field, Czech Republic). Journal of Geosciences, 62, 215–229. doi: 10.3190/jgeosci.245
Blecha V., Fischer T., Tábořík P., Vilhelm J., Klanica R., Valenta J., Štěpančíková P. (2018). Geophysical evidence of the Eastern Marginal Fault of the Cheb Basin (Czech Republic). Studia Geophysica et Geodetica, 62, 4, 660–680. DOI: 10.1007/s11200-017-0452-9.
Petronis M., Valenta J., Rapprich V., Lindline J., Heizler M., van Wyk de Vries B., Shields S., Balek J., Fojtíková L., Tábořík P. (2018). Emplacement History of the Miocene Zebín Tuff Cone (Czech Republic) Revealed From Ground Geophysics, Anisotropy of Magnetic Susceptibility, Paleomagnetic, and 40 Ar/ 39 Ar Geochronology Data. Geochemistry, Geophysics, Geosystems, 19, 10, 3764–3792. DOI: 10.1029/2017GC007324.
Rapprich V., Valenta J., Brož M., Kadlecová E., van Wyk de Vries B., Petronis M.S., Rojík P. A. (2019). Crucial Site in the Argument Between Neptunists and Plutonists: Reopening of the Historical Adit in the Komorní hůrka (Kammerbühl) Volcano After 180 Years. Geoheritage, 11, 347–358.
Hošek J., Valenta J., Rapprich V., Hroch T., Turjaková V., Tábořík P., Pokorný P. (2019). Nově identifikované pleistocenní maary v západních Čechách. Geoscience Research Reports, 52, 97–104.
Klanica R., Kadlec J., Tábořík P., Mrlina J., Valenta J., Kováčiková S., Hill J.G. (2020). Hypogenic Versus Epigenic Origin of Deep Underwater Caves Illustrated by the Hranice Abyss (Czech Republic)—The World's Deepest Freshwater Cave. Journal of Geophysical Research: Earth Surface, 125, e2020JF005663. https://doi.org/10.1029/2020JF005663
Department of Engeneering Geology, Hydrogeology and Applied Geophysics, Faculty of Science, Charles University
I teach courses focused applications of geophysical methods:
Introduction to Applid Geophysics
Geoelctrics and Well-logging
Geoelectrics
Geophysical methods in environmental protection
I run several field courses and participate on the International Research Experience program for Students (IRES).
I have also supervised several bacherol and master theses as well as three Ph.D. students.
Archery Club TJ Sokol-Satalice