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Formation of Sources for Solar Cosmic Rays in Eruptive Flares X6.9 and M5.1 Observed August 9, 2011, and May 17, 2012

Struminsky, A. B.; Grigorieva, I. Yu.

A coronal mass ejection (CME) and solar proton event (SPE) succeeding weak flares in soft X-rays and being observed in the interplanetary space (IS) is not any unusual. However, it remains unclear in what way extreme CME and SPE characteristics can be realized in such cases. The present work compares solar and IS observations associated with the l…

Study of the Magnetic Properties of Sunspot Umbrae

Obridko, V. N.; Fainshtein, V. G.; Rudenko, G. V. +1 more

The paper presents the results of the study of sunspots, obtained by the authors and other researchers in recent years. The results regarding the atmosphere above sunspot umbrae, based on the observational data in the spectral lines of the upper chromosphere and lower corona, are discussed. It is shown that individual parameters of the profile of …

Solar Photospheric Magnetic Fields, Coronal Mass Ejections, and Type II Radio Bursts in Cycles 23 and 24

Bilenko, I. A.

We consider the events of type II radio bursts (RBII) in the decametric and hectometric ranges from 1 to 16 MHz and the dependence of the parameters of associated coronal mass ejections (CMEs) on the background characteristics of the plasma and interplanetary magnetic field (IMF) in the regions where each radio burst was detected in solar cycles 2…