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SOLAR EVENTS OF OCTOBER-NOVEMBER 2003 BY IZMIRAN
Chertok I.M., Fomichev V.V, Gnezdilov A.A., Gorgutsa R.V., Markeev A.K., Sobolev D.E.,
During the extremely powerful flare and coronal mass ejection (CME) activity in October-November 2003, regular everyday observations in the 06-12 UT interval have been carried out in IZMIRAN with digital radiospectrographs at 25-270 MHz and with fixed-frequency radiometers at 169, 204, 3000 MHz. The fist passage of the grandiose evolving active complex across the disk was accompanied by a prominent meter-wavelength noise storm. The most intense storm with numerous bursts and strong continuum occurred from 19 to 30 October. It testifies to permanent electron acceleration over the active complex up to energy of tens of keV. Against this background, intense metric and microwave radio bursts were registered in association with several outstanding events, including the most geoeffective ones of 28 October and 18 November. Dynamic spectra of these events display multi-band, sometimes unusually fast-drifting type II bursts, initiated by a CME-driven shock, and various continuum emission. In some cases, the corresponding microwave burst at 3000 MHz includes not only an impulsive component coinciding with a flare maximum, but also a predominating delayed long-duration component with a smooth time profile. The latter component thoughts to be linked with a post-eruptive energy release and particle acceleration when the magnetic field, strongly disturbed by a CME, relaxes to a new quasi-equilibrium configuration via reconnection in high coronal levels. The compressed spectra for every day, as well as detailed spectra and time profiles of outstanding events are presented at the site http://helios.izmiran.troitsk.ru/lars/LARS.html.