Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh33d..01m&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH33D-01
Physics
Plasma Physics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7514] Solar Physics, Astrophysics, And Astronomy / Energetic Particles, [7859] Space Plasma Physics / Transport Processes, [7984] Space Weather / Space Radiation Environment
Scientific paper
With solar cycle 24 well on its way and the STEREO spacecraft now separated from Earth by more than 90 degrees there have been a number of solar energetic particle (SEP) events associated with CME-driven shocks that have been observed by two and sometimes three separated spacecraft. This provides the opportunity to make improved measurements of the longitudinal spread of SEP intensities and fluences with respect to the location of the flare and CME eruption. Several previous studies have been based on near-Earth single-point measurements, but there have also been earlier multipoint studies based on Helios 1&2 and IMP data inside and near 1 AU, and on early Pioneer data. Our study will cover H (and sometimes He) in the energy range from 0.1 to 100 MeV/nuc, making use of 2007 - 2011 data from STEREO, ACE, SOHO, and GOES. The observed longitudinal spread will be compared with empirical relationships derived from earlier studies. We will also discuss implications for comparisons of the kinetic energy content of CMEs and the associated solar energetic particles.
Cohen M. C.
Gómez-Herrero Raúl
Haggerty Dennis K.
Mason Glenn M.
Mewaldt Richard A.
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