Influence of solar X-ray flares on the earth-ionosphere waveguide

Abstract

A simultaneous analysis of solar are X-ray irradiance and VLF signal amplitude on the GQD/22.1 kHz trace was carried out. Solar are data were taken from GOES 12 satellite listings. The VLF amplitude data were recorded by means of the AbsPAL (Absolute Phase and Amplitude Logger) at the Institute of Physics, Belgrade, Serbia. It was found that solar are events from class C to class X affect the VLF signal amplitude in various ways and can be classified according to the type of effect produced in the Earth-ionosphere waveguide on the VLF propagation.Analiziran je intenzitet X-zracenja tokom solarnog flera i amplitude signala vrlo niskih frekvencija (Very Low Frequency) na trasi GQD/22.1 kHz, za iste vremenske intervale. Podaci o solarnim flerovima uzeti su iz lista registracija satelitskog sistema GOES 12. Podaci o amplitudama VLF signala dobijeni su putem sistema za prijem i belezenje apsolutne vrednosti faze i amplitude, (AbsPal), koji je smesten u Institutu za fiziku u Beogradu. Ustanovljeno je da solarni flerovi, od onih klase C do onih klase X, uticu na amplitudu VLF signala na razlicite nacine i mogu da se klasifikuju u odnosu na tip efekta koji izazivaju pri prostiranju VLF talasa, talasovodom Zemlja-jonosfera.