HR: 1340h
AN: ED43A-0261    [Abstracts]
TI: Response of the Terrestrial Magnetosphere to an Interplanetary Shock
AU: LeBlanc, M
EM: golden4221@excite.com
AF: EOS Space Science Center University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: Kolias, B
EM: kolias@localnet.com
AF: EOS Space Science Center University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: * Raeder, J
EM: J.Raeder@unh.edu
AF: EOS Space Science Center University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: Dorelli, J
EM: john.dorelli@unh.edu
AF: EOS Space Science Center University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AB: We use global magnetohydrodynamic (MHD) simulations to analyze the response of the terrestrial magnetosphere to an interplanetary pressure discontinuity. We perform time-of-flight analyses on the discontinuity as it propagates through the magnetosphere. We find that as the disturbance interacts with the bow shock, new disturbances (a fast mode wave and another contact discontinuity) are launched in the magnetosheath. These new waves are further reflected/transmitted when they make contact with the magnetopause. Eventually, the magnetosphere reaches a new steady state configuration, with the bow shock and magnetopause at new locations (slightly Earthward) which are consistent with the new solar wind pressure.
DE: 7851 Shock waves
DE: 2753 Numerical modeling
DE: 2784 Solar wind/magnetosphere interactions
SC: Education and Human Resourcese [ED]
MN: 2004 AGU Fall Meeting