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The January 10–11, 1997 magnetic cloud: Multipoint measurements
Author(s) -
Šafránková J.,
Němeček Z.,
Přech L.,
Zastenker G.,
Paularena K. I.,
Nikolaeva N.,
Nozdrachev M.,
Skalsky A.,
Mukai T.
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl50330
Subject(s) - magnetopause , magnetosheath , magnetic cloud , solar wind , physics , bow shock (aerodynamics) , geophysics , magnetic field , cloud computing , interplanetary magnetic field , shock wave , mechanics , quantum mechanics , computer science , operating system
The WIND and IMP 8 spacecraft detected a magnetic cloud upstream of Earth's bow shock on January 10–11, 1997 while the INTERBALL‐1, MAGION‐4, GEOTAIL, and LANL‐084 satellites were in the vicinity of the magnetopause and crossed it many times. Based on these multipoint observations we have determined the velocity of the magnetopause motion induced by the abrupt changes in the solar wind dynamic pressure during this event, and also the velocity of propagation through the magnetosheath of the structures connected with the magnetic cloud. Using the determined velocities, we tried to find the spatial orientations and dimensions of the observed disturbances. The estimated orientation of the interplanetary shock driven by the magnetic cloud is interpreted as a consequence of the local deformation of the cloud surface. The timing of measurements made by the aforementioned satellites suggests that the strong density enhancement behind the magnetic cloud is limited in spatial extent. We attribute this enhancement to the interaction of the magnetic cloud with the ambient solar wind plasma.