Václav Vavryčuk is a senior researcher at the Institute of Geophysics CAS. He focuses on theoretical and computational seismology and cosmology. In seismology, he is interested in modelling of seismic waves in isotropic and anisotropic media, near-field waves, parameters of earthquake sources, focal mechanisms and seismic moment tensors, analysis of micro-earthquakes in the West Bohemia region, advanced methods of data processing, and inversion for tectonic stress from focal mechanisms. In cosmology, he is focused on light extinction due to absorption of light by cosmic dust, modelling of extragalactic background light and cosmic microwave background, and on properties of the early universe and its dynamics.

He is an author of more than 100 papers published in impacted astronomical, physical or geophysical journals. He is a Titular Member of the European Seismological Commission for the Czech Republic (2000 – till now).

RNDr. Václav Vavryčuk, DrSc.

senior researcher
Seismic wave & source studies
vv@ig.cas.cz
+420 267 103 020
Office 012
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Publications

 

Lectures

Non-double-couple moment tensors of earthquakes calculated using empirical Green’s functions – lecture presented in the Institute of Geophysics, January 22, 2020, 10:30 a.m.

CV

Academic history

  • 1978 – 1983   Faculty of Mathematics and Physics, Charles University in Prague, title RNDr.
  • 1985 – 1991   postgraduate study in Geophysics, Geophysical Institute, Czechoslovak Academy of Sciences
  • 1991               scientific degree Candidate of Sciences (CSc.)
  • 2001               scientific degree Doctor of Sciences (DrSc.)

Fellowships and long-term stays:

  • 1993 – 1994   JSPS Fellow, University of Hiroshima, Japan
  • 1994               EC GO-WEST Fellow, International Centre for Theoretical Physics,Trieste, Italy
  • 2000               visiting professor, Federal University of Bahia, Salvador, Brazil
  • 2005 – 2008   long-term visits in the Schlumberger Cambridge Research, Cambridge, UK
  • 2017               visiting researcher, GFZ Potsdam, Germany

Appointments:

  • 1984 – 1985        lecturer, Department of Physics, Faculty of Engineering, Czech Technical University, Prague
  • 1985 – 1990        post-graduate student at the Geophysical Institute, Czechoslovak Academy of Sciences
  • 1990 – now         researcher, Institute of Geophysics, The Czech Academy of Sciences
  • 1998 – 2002        head of the Department of Seismology

Projects:

  • 2009 – 2013   EU FP7 Industry-Academia Partnership and Pathways:  ‘Advanced Industrial Microseismic Monitoring’ (AIM), coordinator of the project

Research interests

Theoretical aspects of wave phenomena
·  polarization properties of near-field waves, energy of near-field waves
·  propagation of waves in anisotropic media
·  Green’s functions in isotropic and anisotropic media
·  ray theory, analytical calculations of higher-order ray approximations
·  anisotropic attenuation of waves

Theoretical cosmology
·  galactic and universe opacity
·  attenuation of light in dusty Universe
·  global stellar mass history
·  modelling of the extragalactic background light and the cosmic microwave background
·  the early universe

Computational seismology
·  polarization analysis of seismic waves
· 
modelling of seismic waves by the finite difference method
· 
R/T coefficients in isotropic, anisotropic, elastic and viscoelastic media
· 
modelling of seismic waves in anisotropy with singularities
· 
ray tracing in anisotropic media with singularities
· 
moment tensor inversion, decomposition of moment tensors

Observational seismology
·  analysis of shear-wave splitting, inversion for anisotropy parameters
·  analysis of microearthquakes in West Bohemia, Czech
·  physical interpretation of non-double-couple
·  inversion for parameters of seismic sources in anisotropic media
·  inversion for anisotropy from non-double-couple components of moment tensors
·  analysis of deep earthquakes in the Tonga subduction zone

Open software
·  STRESSINVERSE code – iterative joint inversion for stress and fault orientations from focal mechanisms
·  MT-DECOMPOSITION code – decomposition of moment tensors for double-couple and non-double-couple components
·  PCA-DECOMPOSITION code – decompostion of waveforms using the principal component analysis

Open datasets
·  WEBNET data 2008-2018 – waveforms of selected microearthquakes used in the paper Vavryčuk et al. (2021), Mapping stress and fluids on faults by nonshear earthquakes, Journal of Geophysical Research: Solid Earth.