README

The SVAL program

for frequency-time analysis and dispersion curve inversion

The program has been developed since 2002 - my Master thesis elaboration. It is written in Pascal using the Lazarus environment, and comes as a standalone piece of software with graphical interface for previewing the individual steps of the frequency-time analysis of broadband seismic records. Using the source files, you can compile the SVAL program under Windows, macOS and Linux. In this repository, I also directly provide an executable for Linux (Mint). SVAL is capable to read pre-processed records in ASCII. It can either directly invert the estimated dispersion curve for 1D depth profile, or it can also load an already determined dispersion and invert it. SVAL has a capability for processing large amount of data automatically, as well as for inverting large amounts of dispersion curves automatically (for example thousands of local dispersions determined from surface-wave tomography).

Before you work with the SVAL program, it is recommended to read my PhD thesis, my Master thesis, the paper in AGG, the project report, the tutorial, the paper in Journal of Seismology (2007) and the manual taken from my PhD thesis. For processing of the records of undeground water levels, there is a special hydro function. If you plan to use the SVAL program, please, contact me.

The SVAL program has been used for processing the data in the following papers:

• Qorbani, E., Kolínský, P., Bianchi, I., Zigone, D. and Bokelmann, G., 2022: Upper crustal structure at the KTB drilling site from ambient noise tomography, Geophysical Journal International, 231, 982-995.
• Kolínský, P., Bokelmann, G. and the AlpArray Working Group, 2021: On the wobbles of phase-velocity dispersion curves, Geophysical Journal International, 224, 1477-1504.
• Belinić, T., Kolínský, P., Stipčević, J. and the AlpArray Working Group, 2020: Shear-wave velocity structure beneath the Dinarides from the inversion of Rayleigh-wave dispersion, Earth and Planetary Science Letters, 555, 116686.
• Kolínský, P., Schneider, F. M. and Bokelmann, G., 2020: Surface wave diffraction pattern recorded on AlpArray: Cameroon Volcanic Line case study, Journal of Geophysical Research: Solid Earth, 125, e2019JB019102.
• Lukešová, R., Fotíková, L., Málek, J. and Kolínský, P., 2019: Seismic waves velocities inferred from the surface waves dispersion in the Malé Karpaty Mountains, Slovakia, Acta Geodyn. Geomater., 16, 4(196), 451-464.
• Kolínský, P., Bokelmann, G. and the AlpArray Working Group, 2019: Arrival angles of teleseismic fundamental mode Rayleigh waves across the AlpArray, Geophysical Journal International, 218, 114-144. There is also an online only supplement.
• Gaždová, R., Kolínský, P., Vilhelm, J. and Valenta, J., 2015: Combining surface waves and common methods for shallow geophysical survey, Near Surface Geophysics, 13, 19-32.
• Kolínský, P., Valenta, J. and Málek, J., 2014: Velocity model of the Hronov-Poříčí Fault Zone from Rayleigh wave dispersion, Journal of Seismology, 18, 617-635.
• Kolínský, P., Valenta, J., Gaždová, R., 2012: Seismicity, groundwater level variations and Earth tides in the Hronov-Poříčí Fault Zone, Czech Republic, Acta Geodynamica et Geomaterialia, 9, 2(166), 191-209.
• Kolínský, P., Málek, J., and Brokešová, J., 2011: Shear wave crustal velocity model of the western Bohemian Massif from Love wave phase velocity dispersion, Journal of Seismology, 15, 81-104. The original publication is available at springer.com.
• Gaždová, R., Kolínský, P., Popova, I. and Dimitrova, L., 2011: Surface wave phase velocities between Bulgaria and the Czech Republic, Exploration geophysics, remote sensing and environment, 2011/2, 16-23.
• Gaždová, R., Kolínský, P., Málek, J. and Vilhelm, J., 2008: Shear wave velocities inferred from surface wave dispersion beneath the Příbram array in the Czech Republic, Acta Geodynamica et Geomaterialia, 5(151), 247-255.
• Kolínský, P. and Brokešová, J., 2008: The Western Bohemia uppermost crust Rayleigh wave tomography, Acta Geodynamica et Geomaterialia, 5, 1(149), 5-16.
• Kolínský, P. and Brokešová, J., 2007: The Western Bohemia uppermost crust shear wave velocities from Love wave dispersion, Journal of Seismology 11, 101-120. The original publication is available at springer.com.
• Kolínský, P., 2005: Seismic velocity model in the vicinity of Eger Rift from dispersion of surface waves, Acta Research Reports, No. 14, 1-5.
• Kolínský, P., 2004: Surface waves dispersion curves of Eurasian earthquakes: The SVAL program, Acta Geodynamica et Geomaterialia, 1, 2(134), 165-185.