Microtremors horizontal-to-vertical spectral ratio method was used as a geophysical prospecting method for mapping the thickness of soft sediments. First, microtremor measurements were performed at locations of 53 boreholes and the inverse power relationship between the resonance frequency and the thickness of sediments was determined. Secondly, a 16 km-long seismic refraction profile was measured across the basin and microtremor measurements along the same profile. We confirmed that microtremor method can be used as an effective prospecting method to interpolate the thickness of sediments.
COBISS.SI-ID: 22916647
We used GPS to measure rates of active tectonic deformation in the Adria- Eurasia collision zone. We quantified the kinematics of the Adria microplate, and have for the first time used GPS data from the outcrops of Adria in Istria penninsula. We determined the direction and rates of active tectonic motions in the territory of Slovenia, and estimated slip rates on major regional faults.
COBISS.SI-ID: 4730465
In each point of geodetic network (a body represented by discrete points of geodetic network) kinematic quantities are considered. Empirical results show that statistical properties are strongly related to the orientation in single point and local geometry of the geodetic network. Based on the known probability distribution of kinematic quantities the confidence areas in certain point can be defined. By statistical testing we can decide whether the deformation of network in each point is statistically significant. Quality of the geometry of the geodetic network can also be assessed.
COBISS.SI-ID: 4805473
The geology of Slovenia is a first ever monograph devoted to the geologic properties and geologic evolution of the territory of Slovenia. It is the fundamental publication of the currently active generation of Slovenian geologists. M, Novak is one of the three editors while four more project group members are the sole or first authors of chapters in the monograph. Some key elements of the content rely also on the results of this project.
COBISS.SI-ID: 252691456
Site effects studies using microtremor free-field measurements were performed recently in five Slovenian towns characterized by increased seismic hazard to determine resonance frequency of soft sediments. In this study microtremor investigations were extended to the measurements inside buildings to determine their fundamental frequencies and to assess the possible occurrence of soil-structure resonance. The difference in average fundamental frequency is very clear between buildings with two and three floors, but the difference in frequencies between three- and four-floor buildings is very small. In most Slovenian towns the free-field soft covers frequencies are in the range 2–20 Hz. On the other hand houses with two and three floors represent the large majority of the building stock. To assess the possible occurrence of soil-structure resonance in general, an average fundamental frequency +/– one standard deviation interval is obtained which gives the range 5.6–11.1 Hz. The free-field data shows that this frequency range occupies from 22% of the surveyed area to up to 59% in diferent basins. This leads to the conclusion that the possible occurrence of soil-structure resonance is a serious issue for typical geological situations, in which towns are located.
COBISS.SI-ID: 958302