HR: 0800h
AN: SM41C-1207 [Abstracts]
TI: Analysis of Interplanetary Magnetic Field Fluctuations and Ionospheric Response During the Magnetic
Storm of Nov 8, 2004
AU: Cheung, T D
EM: tdcheung@qcc.cuny.edu
AF: Queensborough Community College, City University of New York, 222-05 56 Avenue, Bayside, NY 11364
United States
AU: Tremberger, G
EM: gtremberger@qcc.cuny.edu
AF: Queensborough Community College, City University of New York, 222-05 56 Avenue, Bayside, NY 11364
United States
AU: * Cotten, D E
EM: decotten@aol.com
AF: Planning and Research Consulting Associates, 70 Shore Road, Bayville, NY 11709
United States
AU: Marchese, P J
EM: pmarchese@qcc.cuny.edu
AF: Queensborough Community College, City University of New York, 222-05 56 Avenue, Bayside, NY 11364
United States
AB:
The magnetic storm of Nov 8, 2004 generated a Dst peak response of about -350 nT, and had several follow-up sub-storms with
Dst peaking at about -200 nT. Data from some twenty other strong magnetic storms was added to the
investigation to extract a correlation between IMF and Dst values. A high correlation coefficient (r ~ 0.9) between the Dst
peak value and the interplanetary magnetic field (IMF) 4 min sigma B distribution tail feature (the number of peaks in the
pre-storm 6-hr period) was obtained. The dB-rms data was also considered. For the Nov 8, 2004 storm, the total electron
content (TEC) of the ionosphere surged to about 5 times the nominal value. The TEC surge was also consistent with the other
observed Dst peak values in the Nov 8, 2004 follow-up sub-storms and other smaller storms such as the May 15 (Dst -250 nT)
and Aug 24 (Dst -200 nT) events in 2005. The ionospheric disturbances caused by X-rays (from solar flares) and the solar
energetic particles (SEP) were used as reference to extract the response of the ionosphere to the events disturbing the IMF.
Cross correlation of the IMF and Dst time series data revealed the usual propagation delay while close proximity was
observed for TEC peaking and sharp decreases in Dst values.
DE: 2134 Interplanetary magnetic fields
DE: 2164 Solar wind plasma
DE: 2700 MAGNETOSPHERIC PHYSICS (6939)
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005