Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh22b03k&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH22B-03
Physics
2111 Ejecta, Driver Gases, And Magnetic Clouds, 2118 Energetic Particles, Solar
Scientific paper
Gradual solar energetic particle (SEP) events are well associated with fast coronal mass ejections (CMEs). The times of significant E > 10 MeV SEP events observed with the Goddard Space Flight Center EPACT detector on the Wind spacecraft have been compared with CME observations from the Lasco coronagraph on the SOHO spacecraft. As earlier studies have shown, a correlation exists between peak SEP intensities and the measured speeds of associated CMEs. Of the CMEs associated with SEP events in the period 1996 to 2000, we find 9 CMEs for which the height-time plots of the leading edges show accelerations of at least 13 m/s/s. The heights at which those CMEs attained speeds of 600 km/s ranged from 7 to 20 Ro. The peak 20 MeV intensities of the 9 SEP events are relatively low compared with all gradual SEP events of the same period. We compare the energy spectra and solar event associations of these 9 SEP events with those of the SEP events associated with CMEs of uniform speeds.
Kahler Stephen
Reames Donald
Sheeley N.
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