Geofyzikální ústav Akademie věd ČR, v.v.i.

Navigace:

Structure of the Earth's crust and uppermost mantle from active and passive experiments


Our research activities are oriented on research of the Earth’s crust and uppermost mantle structure with the use of seismic waves generated by local earthquakes or by the artificial seismic sources.

Active seismic experiments

The deep seismic sounding method is based on the recording of the seismic waves, refracted and reflected, generated by the artificial sources at the surface and recorded mainly by single-channel vertical-component digital recorders. This type of research is carried out in cooperation with foreign institutions in the frame of international active seismic experiments in central Europe – CELEBRATION 2000, ALP 2002, and SUDETES 2003. Data from these experiments serve for calculation of the velocity of seismic wave propagation in the rock medium. This enables to specify physical properties of the Earth’s crust and uppermost mantle to the depths of 50-60 km.

Passive seismic experiments

In the passive experiments, we record waves from natural earthquakes and the three-component recording system is used. The data from local seismicity can be used as another source of information since high-frequency seismic waves generated by local sources are quite sensitive to inhomogeneities in the crust and the observations often represent extensive datasets ideal for stacking. For our studies, we mainly concentrate on the prominent region of increased geodynamic activity – West Bohemia / Vogtland.

The methods developed are being applied to:

  • Bohemian Massif
  • Western Carpathians and Pannonian Basin
  • West Bohemia/Vogtland seismoactive region

Members of the team: