HR: 1340h
AN: SM43A-1067    [Abstracts]
TI: Interplanetary Shock Waves in the Earth Magnetosheath: Cluster Observations
AU: * Pallocchia, G
EM: Giuseppe.Pallocchia@ifsi-roma.inaf.it
AF: Istituto di Fisica dello Spazio Inetrplanetario - Istituto Nazionale di Astrofisica, Via Fosso del Cavaliere, 100, Rome, 00133, Italy
AU: Cattaneo, M B
EM: Maria.Bice.Cattaneo@ifsi-roma.inaf.it
AF: Istituto di Fisica dello Spazio Inetrplanetario - Istituto Nazionale di Astrofisica, Via Fosso del Cavaliere, 100, Rome, 00133, Italy
AU: Marcucci, M F
EM: marcucci@ifsi-roma.inaf.it
AF: Istituto di Fisica dello Spazio Inetrplanetario - Istituto Nazionale di Astrofisica, Via Fosso del Cavaliere, 100, Rome, 00133, Italy
AU: Reme, H
EM: Henri.Reme@cesr.fr
AF: Centre d'Etude Spatiale des Rayonnements, 9 Avenue du Colonel Roche, Toulose, 31028, France
AU: Lucek, E
EM: e.lucek@imperial.ac.uk
AF: Space and Atmospheric Physics, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2BW, United Kingdom
AB: Shock waves collisions are a basic problem in plasma physics and play an important role in many processes occurring in space. In particular, the impacts of the interplanetary shock waves (IPS) on the terrestrial bow shock are relevant to the Space Weather. In fact, understanding how the associated pressure pulses in magnetosheath are shaped after these impacts, can help to model in a more realistic way the perturbed magnetosphere and to gain a deeper knowledge into the fundamental mechanisms causing the geomagnetic activity. Here we present an event, seen by Cluster spacecraft, showing the complex and non-linear nature of the phenomenon. Actually the associated variations in plasma parameters and in the magnetic field are due, besides the transmitted interplanetary shocks, to other secondary (i.e. produced in the impact) discontinuities and waves.
DE: 2139 Interplanetary shocks
DE: 2728 Magnetosheath
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting