Effective geophysical methodology for investigation of a complex landslide system in Valjevo, Serbia

Torrential rainfall occurred at the end of May 2014 across Serbia, and Bosnia and Herzegovina (BiH) triggered thousands of new landslides. Shortly after a diverse group of geoscientists united to investigate this phenomenon. The methodology used to study and characterize landslides consisted of a combination of highresolution seismic profiling, resistivity measurements, refraction tomography and MASW, all conducted along the same track. All body wave related investigations were extracted from a high-resolution, high-density seismic reflection survey. This approach enabled us to study many different landslides in a short period of time. Joint analysis of seismic and electric measurements allowed us to characterize important structures, local discontinuities, geometry of the near surface layers and architecture of a landslide. Reactivation potential was studies through time lapse geophysical measurements that proved to be difficult to accomplish with satisfactory repeatability in populated areas

High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region

In this work the strong influence of geological factors on the variability of indoor radon is found in two of three geologically very different regions of South-Eastern Europe. A method to estimate the annual mean concentration when one seasonal measurement is missing is proposed. Large differences of radon concentrations in different rooms of the same house and significant difference in radon concentrations in one season comparing it to the others are noted in certain cases. Geological factors that can lead to such behavior are discussed. (C) 2014 Elsevier Ltd. All rights reserved