Active region evolution in the build-up to large solar energetic particle events

Details Active region evolution in the build-up to large solar energetic particle events Active region evolution in the build-up to large solar energetic particle events

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh53a..02a&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SH53A-02

Physics

7509 Corona, 7513 Coronal Mass Ejections, 7519 Flares, 7524 Magnetic Fields

Scientific paper

The SEP signatures of the solar flares occurring on 21 Apr 2002 and 24 Aug 2002 show marked differences in their compositions above 10 MeV/nucleon, yet at the Sun the events themselves display very similar characteristics in the chromospheric (hard X-ray) emission and their coronal (X-ray, EUV) signatures. We consider the prior evolution of the parent active regions to look for possible signatures in the ambient corona, magnetic connectivities (within the active region, large-scale closed field, and open field distributions), and flare/activity history which may differentiate the solar conditions leading to the observed disparate particle signatures at 1 AU.

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