ANALYZING SOLAR, COSMIC, AND GEOPHYSICAL EVENTS IN SEPTEMBER 2017 USING SHICRA SB RAS COMPLEX OBSERVATIONS
Journal Title: Solar-Terrestrial Physics - Year 2019, Vol 5, Issue 1
Abstract
We report the results of monitoring of cosmic rays and geomagnetic field along 210 magnetic meridians in Yakutia in the first half of September 2017. The energy spectrum of solar cosmic rays during Ground Level Enhancement in September 10, 2017 is estimated as J=3027E–1.99exp(–E/729 MeV). We present the results of the forecast and complex analysis of the magnetic storm on September 7–9, 2017 with Dst=–124 nT. The forecast lead time is about one day. We examine how the storm affected the electric potential and VLF signal propagation from RSDN-20 radio navigation stations. Irregular Pi3–Pi1 pulsations occurred during the September 8, 2017 magnetic storm from 12 to 20 UT. The pulsations were accompanied by variations in electrotelluric potentials and geomagnetic fields with the correlation coefficient between them ρ(E, H)=0.5÷0.9. The effects of the magnetic storm manifested themselves as an increase in the attenuation and a decrease in the phase delay of VLF radio signals.
Authors and Affiliations
Starodubtsev S. A. , Baishev D. G. , Grigoryev V. G. , Karimov R. R. , Kozlov V. I. , Korsakov A. A. , Makarov G. A. , Moiseev A. V.
SECOND-ORDER PERTURBATIONS IN ALFVÉN WAVES IN FINITE PRESSURE PLASMA
It is shown first that in finite pressure plasma, just as in cold plasma, Alfvén waves created by an initial perturbation generate plasma flows and decreases in the magnetic field, which propagate along with these waves....
Information Abstract Text Hysteresis effect between geomagnetic activity indices (Ap, Dst) and interplanetary medium parameters in solar activity cycles 21–24
We have studied the relationship of geomagnetic activity indices (Ap, Dst) on time intervals, equal to solar cycles (∼11 years), with solar activity indicators and heliospheric parameters. It is shown that the plots of t...
MUON INTENSITY VARIATIONS AND ATMOSPHERIC TEMPERATURE
Muons in the atmosphere are formed during the decay of pions resulting from nuclear interactions of cosmic rays with nuclei of air atoms. The resulting muons are also unstable particles with a short lifetime. Therefore,...
BEHAVIOR OF ELECTRON DENSITY IN THE IONOSPHERE OVER NORILSK DURING THE PERIOD OF DECLINING SOLAR ACTIVITY
We report the results of approximation of electron density Ne array obtained with a digisonde at the high-latitude station Norilsk (69.40° N, 88.10° E) during years of declining solar activity (2003–2006). The calculatio...
SOLAR ACTIVITY RESEARCH AT THE BAIKAL ASTROPHYSICAL OBSERVATORY OF ISTP SB RAS
The article presents the main results of solar studies carried out at the Baikal Astrophysical Observatory (BAO) of the Institute of Solar-Terrestrial Physics SB RAS (ISTP SB RAS) for 40 years. It outlines the history of...