The Carrington Event: Possible Solar Proton Intensity-Time Profile

Details The Carrington Event: Possible Solar Proton Intensity-Time Profile The Carrington Event: Possible Solar Proton Intensity-Time Profile

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsh43a..01s&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SH43A-01

Physics

2114 Energetic Particles, Heliospheric (7514), 2118 Energetic Particles, Solar, 7514 Energetic Particles (2114)

Scientific paper

We evaluate the >30 MeV proton fluence associated with the Carrington event as 1.9 x 10**10 protons per sqcm based on the analysis of solar proton generated NO(y) radicals that are deposited in polar ice. (See McCracken et al., JGR, 106, 21,585, 2001.) We construct a possible intensity-time profile of the solar particle flux for this event by assuming that it is part of the class of interplanetary shock dominated events where the maximum particle flux is observed as the shock passes the earth. We show that most of the very large solar proton fluence events (those with >30 MeV omnidirectonal fluence exceeding 1 x 10**9 protons per cmsq) observed at the earth during the last 50 years belong to this class of event.

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