NOAA AR 8210: EVOLUTION AND FLARES FROM MULTIBAND DIAGNOSTICS

NOAA 8210 has been a region showing a remarkable level of activity well before solar maximum. Dominated by a large, rapidly rotating δ spot, it produced several intense flares during its disk passage at the end of April-beginning of May 1998. We examine the development of AR 8210 in Hα and white lig...

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Published in:Solar physics 2000-05, Vol.194 (1), p.103-120
Main Authors: Warmuth, Alexander, Hanslmeier, Arnold, Messerotti, Mauro, Cacciani, Alessandro, Moretti, Pier Francesco, Otruba, Wolfgang
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Language:English
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Solar flares
Solar physics
Topology
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container_start_page 103
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creator Warmuth, Alexander
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Messerotti, Mauro
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Otruba, Wolfgang
description NOAA 8210 has been a region showing a remarkable level of activity well before solar maximum. Dominated by a large, rapidly rotating δ spot, it produced several intense flares during its disk passage at the end of April-beginning of May 1998. We examine the development of AR 8210 in Hα and white light (WL) and study the evolution of its complex magnetic topology. While the other principal flares are briefly reviewed, the great X1.1/3B flare of 2 May, which was observed at Kanzelhöhe Solar Observatory during a SOHO/UVCS ground support campaign, is studied in detail. This event has been documented in full-disk Hα and Na-D intensitygrams, Dopplergrams, and magnetograms, with a time cadence of one minute each. The flare was associated with a CME and produced significant geomagnetic effects. Furthermore, we point out the perspectives for our planned Flare Monitoring and Alerting System, since the two new instruments (Magneto-Optical Filter and Digital Hα camera), which made their first operational run with the campaign, are crucial components for this program.[PUBLICATION ABSTRACT]
doi_str_mv 10.1023/A:1005284918367
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subjects Solar flares
Solar physics
Topology
title NOAA AR 8210: EVOLUTION AND FLARES FROM MULTIBAND DIAGNOSTICS
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