Volume 18 No 9 (2020)
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Investigate of 4 Strong Solar Eruptions in September 2017 and their Impacts on the Earth
H. Allawi, A. Alsawad, Rabab Mazher
Abstract
We observed 4 Solar Energetic Particle SEP events by (Energetic and Relativistic Nuclei and Electron) ERNE onboard The (Solar and Heliospheric Observatory) SOHO spacecraft during September 2017. All the events have a similarity in the intensity time profile, they fit under the gradual type and associated with halo coronal mass ejections CMEs and three of them were associated with a solar flare. The acceleration of the impulsive phase should be a result of coronal shock due to investigations of the radio type II emission and the gradual part as a result of interplanetary shock, which caused a D-H radio emission. The record of the shock waves by (Charge, Element, and Isotope Analysis System) CELIAS onboard SOHO did not appear for two of those events although all the evidence suggested that there were strong shocks associated with those SEP events at the sun and interplanetary IP medium beside auroral observation at earth were seen in association of the arrival time.
Keywords
Solar Flares, Coronal Mass Ejections, Shock Waves.
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