Other
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ssrv...32..145p&link_type=abstract
(Slovenska Akademia Vied, IAU, and COSPAR, Study of Travelling Interplanetary Phenomena Workshop on Shock Waves in the Solar Cor
Other
31
Interplanetary Space, Shock Wave Propagation, Solar Flares, Collisionless Plasmas, Latitude, Scintillation, Shock Wave Profiles
Scientific paper
The general properties of flare-generated collisionless interplanetary shock wave propagation, determined from multiple spacecraft plasma and magnetic field observations as well as by interplanetary radio source scintillation, are considered. The events investigated display an average shock wave propagation velocity from the sun out to 1 AU which is higher in the direction of the flare normal than in other directions. The average shock wave velocity's gradient of decrease away from the flare normal is between 8 and 15 km/sec per deg, in both heliocentric latitude and longitude, and this anisotropic velocity distribution leads to a nonspherical shock wave front shape. A significant characteristic of the scintillation index is its dependence on heliocentric latitude, so that the maximum value is observed along the flare normal and values decrease with angular distance to the north and south.
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