South African Journal of Science
versão On-line ISSN 1996-7489
versão impressa ISSN 0038-2353
Measurements of the amplitude and phase of very low frequency transmitter signals were used to evaluate the effects on the ionosphere of a moderate intensity solar flare that occurred on 13 December 2007. These measurements were compared to modelled results from the Long Wave Propagation Capability code. The ionospheric effects were found to be delayed by ~1 min with respect to the 0.1-0.8 nm solar X-ray flux.
Palavras-chave : VLF; solar flare; D-region; ionosphere; X-ray.