Solar Radio Type-I Noise Storm Modulated by Coronal Mass Ejections

摘要: The first coordinated observations of an active region using ground-based radio telescopes and the Solar Terrestrial Relations Observatory (STEREO) satellites from different heliocentric longitudes were performed to study solar type-I noise storms. A storm was observed between 100 300 MHz during a period 2010 February 6 7. During this two STEREO located approximately 65° (ahead) –70° (behind) Sun-Earth line, which is well suited observe earthward propagating coronal mass ejections (CMEs). flux enhanced after preceding CME began decrease before subsequent CME. This time variation directly related change particle acceleration processes around its source region. Potential-field source-surface extrapolation Heliospheric Observatory/Michelson Doppler Imager (SOHO/MDI) magnetograms suggested that there multipolar magnetic system CMEs occurred neutral line system. From our observational results, we suggest activated at side-lobe reconnection formed eruption structure deformed by loop expansion led CME, then suppressed burst emission.