[1] Inst Solar Terr Phys SB RAS, Lermontov St 126a, Irkutsk 664033, Russia
[2] Northumbria Univ, Dept Math Phys & Elect Engn, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
[3] NASA, Heliophys Sci Div, Solar Phys Lab, Goddard Space Flight Ctr, Code 671, Greenbelt, MD 20771 USA
[4] Univ Warwick, Ctr Fus Space & Astrophys, Phys Dept, Coventry CV4 7AL, W Midlands, England
[5] RAS, Cent Astron Observ Pulkovo, St Petersburg, Russia
[6] Univ Calabria, Dipartimento Fis, Via P Bucci,Cubo 31C, I-87036 Arcavacata Di Rende, CS, Italy
[7] Katholieke Univ Leuven, Math Dept, Ctr Math Plasma Astrophys, Celestijnenlaan 200B Bus 2400, B-3001 Leuven, Belgium
[8] Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen 518055, Guangdong, Peoples R China