July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

On the influence of the coronal hole latitude and polarity on the geomagnetic activity and cosmic ray variations.

Jul 30, 2015, 3:30 PM
1h
Theater Foyer (World Forum)

Theater Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 31
Poster contribution SH-EX Poster 1 SH

Speaker

Dr Olga Kryakunova (Instutute of Ionosphere, Almaty, Kazakhstan)

Description

Changes of indices of geomagnetic activity, and also cosmic ray density and anisotropy in high-speed streams of a solar wind from various solar coronal holes are studied. About 350 coronal holes observed in 1996-2013 were divided into groups taking into account their polarity and heliolatitude. It is shown that northern holes with negative polarity and the southern holes with positive polarity are more effective than other holes in creation of geomagnetic activity. The behavior of vector anisotropy of the cosmic rays (especially its North -South component) depends substantially on polarity of a magnetic field in a high-speed stream. The obtained results have to be useful to forecasting of geomagnetic activity and diagnostics of large-scale interplanetary disturbances.
Registration number following "ICRC2015-I/" 432

Primary author

Dr Olga Kryakunova (Instutute of Ionosphere, Almaty, Kazakhstan)

Co-authors

Dr Anatoliy Belov (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia) Dr Artem Abunin (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia) Dr Evgeniya Eroshenko (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia) Mrs Mariya Abunina (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia) Dr Sergey Gaidash (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia) Dr Viktor Yanke (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia) Dr Viktoriya Oleneva (Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Moscow, Russia)

Presentation materials