Similarities and differences between heliosphere-geosphere couplings associated with the short and long lived subauroral ionospheric storms: November 2004, F2 region, North East Asia

• Published in: Advances in Astronomy and Space Physics
• Date: 2012
• Main Authors: Chelpanov, M.A., Zolotukhina, N.A.
• Format: Article
• Language: English
• Published: Головна астрономічна обсерваторія НАН України 2012
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/119165
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Similarities and differences between heliosphere-geosphere couplings associated with the short and long lived subauroral ionospheric storms: November 2004, F2 region, North East Asia / M.A. Chelpanov, N.A. Zolotukhina // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 1. — С. 91-94. — Бібліогр.: 9 назв. — англ.

We analysed ground and in situ data collected on 9-10 November 2004 during the first day of the long-lived ionospheric storm which consequences were observed in the ionosphere till 13 November and compared the results with those obtained from the short-lived 7-8 November ionospheric storm study. During the first day of each storm we observed a positive nocturnal phase associated with a movement of the plasma sheet inner edge towards the Earth and westward auroral electrojet amplification. In both cases morning-midday negative phases of the storms evolved over the north-west electrojet in the compressed magnetosphere. The short-lived negative phase of 7-8 November storm evolved with the south-west interplanetary magnetic field (IMF), solar wind velocity VSW about 600 km/s and was associated with irregular geomagnetic pulsations. The long-lived negative phase of 9-13 November storm started with the north-west IMF, solar wind velocity about 800 km/s, and was associated with continuous Pc5 pulsations. We suppose that the high-latitude reconnection and Pc5 provided an additional energy input to the subauroral ionosphere and thereby contributed to formation of the long-lived neutral composition disturbance zone.