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Earthquakes are unevenly distributed in space. Seismic events are predominantly concentrated within well-defined seismic belts, many of which coincide with the boundaries and interaction zones of major tectonic plates. These zones represent areas of accumulated stress and active geodynamic processes, where earthquake generation is most frequent. In seismically active territories such as Bulgaria, earthquakes constitute one of the most significant natural hazards due to their potential societal and infrastructural ...

This study assesses surface deformation in the Vyshegrad Fortress area using Synthetic Aperture Radar (SAR) data. The site, located near the Studen Kladenets dam, is affected by complex geomorphological and environmental conditions that may compromise structural stability. Steep slopes prone to erosion and landslides, increased moisture, rock fracturing, and regional seismic activity pose significant risks to the integrity of the stone architectural complex. Their evaluation is essential for effective preservation...

The scientific research presented in the article is related to the application of methodologies for monitoring deformations of the Earth's crust. Intensively developing technologies were used, such as GNSS and SAR methods. The Sofia region is among the earthquake zones in Bulgaria. The general conclusion is, that Sofia located in an area characterized by a high seismic risk, with considerable consequences in the case of a strong seismic event. New scientific knowledge about the geodynamics of the region and the ph...

In this study the effect of hazardous geodynamic processes in the area around the city of Sofia is investigated using radar satellite data. The area is of particular interest due to its high population density and high concentration of industrial facilities and residential areas. This highlights the importance of the study area in societal aspect. This the reason the authors set the main objective of this research to be the monitoring of the ongoing geodynamic processes by complementary use of synthetic aperture r...

This paper covers the activities of creating a database for the study of modern crustal movements in the region of Sofia and Southwestern Bulgaria, including data from GNSS measurements of the geodynamic network and the results of their processing and analysis, data from permanent stations and archive data from Synthetic-aperture radar, processing and obtaining interferometric images. The local archive of GNSS measurement includes: manual sketches of the location of the points; log sheets of the measurement with i...

The focus of this study is detection of the deformations of the Earth's surface caused by March 3 2021 earthquake using Differential Interferometric Radar Synthetic Aperture technique. This method takes advantage of the remotely sensed SAR data provided at no cost by ESAs’ Sentinel-1 mission which are often used for creation of topographic maps as well as for detection of ground motions. The final results of this processing deliver reliable information about the displacements caused by the mentioned events with ce...

The Bulgarian northern Black Sea coast is affected by many landslides. Several geodynamic networks have been built to study landslide processes in the northern Black Sea coast. Landslide research is important, as these phenomena can lead to great material damage. Their destructive impact on buildings, engineering structures and disturbances in the resilience of the earth's crust causes enormous economic, environmental, social and other damage, and often takes human lives. A modern tool for monitoring landslides is...

Geodynamic processes and seismic activity are considered to be the prime driver of horizontal and vertical movements of the Earth's crust in the Balkan Peninsula. One proven method for continuous monitoring of ground deformations is the use of data from active radar remote sensing. These data are the basis for the creation of interferometric images (IFIs) for quantitatively assessment the recorded ground movements of the Earths? surface within a fixed time interval. For this research a set of IFIs were created for...

Obtaining reliable data on the ongoing risky geo-processes and obtaining adequate and reliable information about them on the current state of the Earth's surface is a key factor in tracking the origin and dynamics of landslide processes as well as assessing the resulting threats to the population and infrastructure. According to information provided by the national authority responsible for the monitoring and keeping track of the landslides over the past two years their number has almost doubled. This is the main ...