Comparison Between Ground-Based and Direct Spacecraft Observations of Solar Energetic Particle Spectra During the January 20, 2005 Solar Flare

Details Comparison Between Ground-Based and Direct Spacecraft Observations of Solar Energetic Particle Spectra During the January 20, 2005 Solar Flare Comparison Between Ground-Based and Direct Spacecraft Observations of Solar Energetic Particle Spectra During the January 20, 2005 Solar Flare

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh23a0321m&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH23A-0321

Astronomy and Astrophysics

Astrophysics

2114 Energetic Particles (7514), 7500 Solar Physics, Astrophysics, And Astronomy, 7514 Energetic Particles (2114), 7519 Flares, 7900 Space Weather

Scientific paper

We report energy spectra of solar energetic particle events at Earth derived from ground-based and direct spacecraft measurements during the January 20, 2005 solar event. The X7.1 class flare of 20 January 2005 has produced a ground level enhancement (GLE) event which was observed with several neutron monitor observatories. We modeled a spherical distribution of this GLE by fitting neutron-monitor intensities to a first order anisotropy. The solar proton spectrum has been derived from this spherical distribution and the response of the neutron monitors to solar protons. Comparisons of the intensity time profile and the energy spectra derived from neutron monitors and from spacecraft measurements by instruments on ACE, SAMPEX, and GOES will be presented.

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