Contents
Daniel Ishlyamski, Bozhurka Georgieva, Neli Jordanova – Geophysical magnetometric study on the degree of anthropogenic pollution at children playgrounds in the city of Sofia
Dimcho Solakov, Irena Aleksandrova, Stela Simeonova, Plamena Raykova – The devastating earthquake of September 30(18), 1858
Plamen Mukhtarov, Nikolay Miloshev, Georgi Gadzhev, Rumiana Bojilova – Monitoring and forecasting the biologically active ultraviolet radiation of the Sun
Metodi Metodiev, Petya Trifonova – Annual report of the observed geomagnetic activity in Panagjurishte observatory for 2015
Dragomir Dragomirov, Emil Oynakov, Valentin Buchakchiev, Yordan Milkov – Seismicity on the territory of Bulgaria and the adjacent lands recorded by NOTSSI in 2019
Plamena Raykova – Estimation of earthquake source parameters using P and S-waves spectra – case study the 2012 seismic cluster in Sofia seismogenic zone
Rumiana Bojilova, Plamen Mukhtarov – Short-term prediction of the ionospheric critical frequencies over Bulgaria
Maria Chamati – ULF geomagnetic observation at Panagjurishte, Bulgaria, as a tool for investigation of the magnetosphere-ionosphere-lithosphere system
Ivan Buchvarov – Geomagnetic field, geomagnetic measurements and models, field mapping
Plamena Raykova – Estimation of source parameters for swarm type of seismicity