Barkhatov N.A.,Nizhny Novgorod State Pedagogical University |
Obridko V.N.,Russian Academy of Sciences |
Revunov S.E.,Nizhny Novgorod State Pedagogical University |
Snegirev S.D.,Scientific Research Radiophysical Institute |
And 2 more authors.
Geomagnetism and Aeronomy | Year: 2016
We compare long-period pulsations of the horizontal component of the geomagnetic field at intervals that precede extreme solar flares. To this end, we use the wavelet–skeleton technique to process the geomagnetic field disturbances recorded at magnetic stations over a wide geographical range. The synchronization times of wavelet–skeleton spectral distributions of long-period pulsations of geomagnetic oscillations over all magnetic stations are shown as normalized histograms. A few days before an intense solar flare, the histograms show extremes. This means that these extremes can be regarded as flare precursors. The same technique is used to analyze the parameters of near-Earth space. The histograms obtained in this case are free of the aforementioned extrema and, therefore, cannot point to an upcoming flare. The goal of this study is to construct a correlation–spectral method for the short-term prediction of solar flare activity. © 2016, Pleiades Publishing, Ltd.
Kulilov Y.Y.,RAS Institute of Applied Physics |
Frolov V.L.,Scientific Research Radiophysical Institute |
Grigor'ev G.I.,Scientific Research Radiophysical Institute |
Demkin V.M.,RAS Institute of Applied Physics |
And 3 more authors.
Geomagnetism and Aeronomy | Year: 2013
We detected a decrease in the intensity of microwave radiation at the atmospheric ozone line at a frequency of 110836. 04 MHz during ionospheric modification by high-power HF radiowaves radiated by the Sura Ionospheric Heating Facility. The obtained experimental data allowed us to hypothesize that this effect was caused by the fact that mesospheric ozone was affected by internal gravity waves generated in the E region of the ionosphere during its high-power HF radiowave heating. © 2013 Pleiades Publishing, Ltd.