Open AccessMagnetosheath response to the interplanetary magnetic field tangential discontinuity
Author(s) -
Šafránková J.,
Přech L.,
Němeček Z.,
Sibeck D. G.,
Mukai T.
Publication year - 2000
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/1999ja000435
Subject(s) - magnetosheath , bow shock (aerodynamics) , physics , solar wind , interplanetary spaceflight , geophysics , interplanetary magnetic field , magnetopause , magnetosphere , magnetic field , astrophysics , foreshock , shock wave , mechanics , geology , quantum mechanics , seismology , aftershock
We present a multipoint observational study of the magnetosheath response to the interplanetary magnetic field tangential discontinuities which form hot flow anomaly‐like (HFAs) structures. We identify these structures in the vicinity of the bow shock as well as deeper in the magnetosheath. Two or more points of simultaneous observations allow us to describe the gradual evolution and propagation of these HFAs through the magnetosheath. From tens of events recorded by INTERBALL‐1, we present two cases. In the first, GEOTAIL identified HFAs in the solar wind near the bow shock, and INTERBALL‐1 and MAGION‐4 observed related events in the magnetosheath. During the second interval, all three spacecraft observed the HFA features in the magnetosheath. Our analysis of reported events suggests the negligible evolution of these structures in the magnetosheath. A survey of the INTERBALL‐1 data has shown that magnetosheath HFAs are observed predominantly during periods of fast solar wind.