Multipoint Analysis of the Interaction between a Shock and an ICME-like Structure around 2011 March 22

Abstract This work reports on the interaction between a fast forward shock and an interplanetary coronal-mass-ejection-like structure (ICMELS) as observed by in situ observations of radially aligned spacecraft. Around 2011 March 22, Venus EXpress (VEX) Solar TErrestrial RElations Observatory-A (STEREO-A) were nearly at same longitude, providing us with excellent opportunity to study formation evolution complex structures. The ICMELS investigated this paper are isolated near Venus, but when they approach STEREO-A, approaches front edge forms shock–ICMELS structure. maximal magnetic field increased 2.3 times due compression, according observation. recovery model, which restores shocked portion its uncompressed condition, likewise confirms improvement. ICMELS, other hand, weakens 2. compression ratio falls from 2.4 2.0 STEREO-A. research enables have better physical knowledge impacts ICME (or ICMELS), will aid future space weather predictions.