Influence of sun elevation, azimuth and X-ray bursts on long distance VLF radio propagation

This paper presents some preliminary data sets regarding the propagation of VLF radio waves during high Solar activity. Data were acquired in Romania in 2013 using a proprietary radio receiver developed at BITNET CCSS. The purpose of this experiment was to estimate the impact of significant solar X-ray bursts on long distance radio propagation at frequencies lower than 30 KHz.