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SUMMARY:Unusual Solar Energetic Proton Fluxes at 1 AU within an Interplane
 tary CME
DTSTART;VALUE=DATE-TIME:20070705T141800Z
DTEND;VALUE=DATE-TIME:20070705T143000Z
DTSTAMP;VALUE=DATE-TIME:20261016T112107Z
UID:indico-contribution-1189@cern.ch
DESCRIPTION:Speakers: MULLIGAN\, Tamitha (The Aerospace Corporation\, Spac
 e Science Applications Laboratory\, Los Angeles\, CA\, USA)\nIn mid Decemb
 er 2006 several flares on the Sun occurred in rapid succession\, \nspawnin
 g several CMEs and bathing the Earth in multiple solar energetic \nparticl
 e (SEP) events. One such SEP occurring on December 15th was observed \nat 
 the Earth just as an interplanetary CME (ICME) from a previous flare on \n
 December 13th was transiting the Earth. Although solar wind observations \
 nduring this time show typical energetic proton fluxes from the prior SEP 
 and IP \nshock driven ahead of the ICME\, as the ICME passes the Earth unu
 sual \nenergetic particle signatures are observed. Measurements from ACE\,
  Wind\, and \nSTEREO show unusual proton flux variations at energies rangi
 ng from ~3 MeV \nup to greater than 70 MeV. Within the Earth’s magnetosp
 here Polar HIST also \nsees unusual proton flux variations at energies gre
 ater than 10 MeV while \ncrossing open field lines in the southern polar c
 ap. However\, no such variation \nin the energetic proton flux is observed
  at the GOES 10 or GOES 11 spacecraft \nin geosynchronous orbit. Different
 ial fluxes observed at GOES 12 in the 15-40 \nMeV energy range show some v
 ariation. However\, the overall energetic particle \nsignature within the 
 ICME at GEO orbits remains unclear. This event illustrates \nthe need for 
 caution when using GEO data in statistical studies of SEP events \nand in 
 interplanetary models of energetic particle transport to 1 AU.\n\nhttps://
 indico.nucleares.unam.mx/event/4/session/74/contribution/1189
LOCATION:Merida\, Mexico Yucatan I (Fiesta Americana)
URL:https://indico.nucleares.unam.mx/event/4/session/74/contribution/1189
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