INFRASONIC EFFECT OF SOLAR ECLIPSES

Abstract

The relevance of this study is due to the need to understand
physical effects associated with rare phenomenon, solar eclipse.
Until recently, the features of internal gravity wave generation
have been studied in the 10 −100 min period range, while in this
study an attempt is made to confirm the fact of generation
and estimate the general parameters of infrasound oscillations
associated with solar eclipses in the 1−10 min period range.
The observations were made with the HF Doppler radar at vertical
incidence. The data were subjected to spectral analysis and
band-pass filtering. The solar eclipses that had occurred over
Kharkiv city (Ukraine) within 1999–2011 are determined to be
associated with Doppler shift of frequency oscillations in the
infrasound frequency band (~ 5−8 min period range) and with
amplitude of 20 −100 mHz. The corresponding amplitude
of electron density oscillations was approximately equal to
0.1− 0.5 %.