Geode (Geometrics) seismograph is a state-of-the-art seismic survey system. It is used for the reconnaissance of both the shallow zone of the subsurface (for engineering, geotechnical and environmental purposes) and the deep zone (reservoir and structural imaging). It allows P-wave (SRT-P) and S-wave (SRT-S) refraction and refraction tomography measurements, multi channel analysis of surface wave (MASW), as well as shallow P- and S-wave reflection profiling and shallow borehole (downhole, crosshole, VSP) measurements. A high-energy (4088 J) Gisco ESS 500 TURBO mobile system is used as a seismic source, as well as hammers and shear wave sources. Seismic waves are recorded with receivers of 4.5 Hz, 14 Hz and 100 Hz. High sensitive horizontal receivers at 4.5 Hz are used for S-wave surveys. The Geode seismograph allows up to 72 receivers to be connected. Borehole surveys use a hydrophone streamer, a 3C probe and a sparker as a seismic source. The seismograph also allows measurements of passive seismic methods - ReMi (Refraction Microtremor), SPAC/ESAC (Spatial Autocorrelation/Extended Spatial Autocorrelation) and HVSR (Horizontal-to-Vertical Spectral Ratio).
Sharing of equipment requires prior approval of the Head of the Department. Sharing takes place on a collaborative basis or for a fee, under commercial orders.
High resolution structural and reservoir recognition to a depth of about 500m, research of the soil and rock medium for civil engineering, recognition of landslide zones, detection of fracture and loosening zones, voids, caverns and sinkholes, rippability analysis, determination of the bedrock, soil thickness and soil classification, support of geotechnical and engineering geology studies, seismic site characterization using the Vs30 parameter according to NEHRP and UBC classification.
- P-wave measurements
- S-wave measurements
- Surface wave measurements
- Refraction seismic
- Reflection seismic
- Multichannel analysis of surface waves
- Determination of dynamic elastic moduli of the near-surface zone
- Borehole measurements
- Passive seismic