HR: 0800h
AN: SH32A-0768    [Abstracts]
TI: Early Evolution of CMEs as Observed by SECCHI EUVI on STEREO
AU: * Lemen, J R
EM: lemen@lmsal.com
AF: LMATC, Dept ADBS, Bldg 252 3251 Hanover Street, Palo Alto, CA 94304, United States
AU: Nitta, N V
AF: LMATC, Dept ADBS, Bldg 252 3251 Hanover Street, Palo Alto, CA 94304, United States
AU: Wülser, J
AF: LMATC, Dept ADBS, Bldg 252 3251 Hanover Street, Palo Alto, CA 94304, United States
AU: Aschwanden, M J
AF: LMATC, Dept ADBS, Bldg 252 3251 Hanover Street, Palo Alto, CA 94304, United States
AB: We report on two eruptions associated with small (C1 and B8) flares that occurred in AR 956 on 2007 May 19 and 20, as observed stereoscopically by EUVI. The separation of the two spacecraft was approximately 9 degrees. Pairs of images in 171~Å\ and 304~Å\ from two view angles are used to constrain the trajectories of the ejecta or filaments that appear to be responsible for the associated CMEs; they were not homologous. We study how the 3D motions of the ejecta in the low corona correspond to the CMEs at higher altitudes. We also discuss the possible relation between the early CME propagation and the coronal magnetic field topology inferred from EUV loops in EUVI and TRACE 171~Å\ images.
DE: 7513 Coronal mass ejections (2101)
DE: 7524 Magnetic fields
DE: 7531 Prominence eruptions
DE: 7549 Ultraviolet emissions
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting