Abstract Title: * Low ionospheric disturbances induced by different terrestrial and extraterrestrial phenomena Authors: * Aleksandra Nina Institution: * Institute of Physics, University of Belgrade, Belgrade, Serbia Preferred format: * Oral Abstract Text: * In this study we present recent analyses of the low ionospheric plasma disturbances during influences of different events. We considered perturbations due to phenomena occurred in the outer space and Earth’s layers. During last period our attention was focused on analyses effects in the periods of solar X-ray flare impacts and around tropical depression beginnings. Also we give one study about differences in detection different events. Our research is based on the low ionospheric observations by very low and low frequency radio waves and data collected by the Belgrade VLF/LF receiver station.