Solar flares with and without SOHO/LASCO coronal mass ejections and type II shocks

Abstract

We analyse of a set of radio rich (accompanied by type IV or II bursts) solar flares and their association with SOHO/LASCO Coronal Mass Ejections in the period 1998-2000. The intensity, impulsiveness and energetics of these events are investigated. We find that, on the average, flares associated both with type IIs and CMEs are more impulsive and more energetic than flares associated with type IIs only (without CME reported), as well as flares accompanied by type IV continua but not type II shocks. From the last two classes, flares with type II bursts (without CMEs reported) are the shortest in duration and the most impulsive.

Dependence of the Characteristics of Solar Wind Discontinuities and Shocks with Heliolatitude and Radial Distance

“…The solar wind velocity, proton density, temperature and radial IMF show sudden jumps in the starting phase and then decrease gradually. The event that displays a sudden rise in the strength of all solar wind parameters may be well attributed to a flare associated CME (Shanmugaraju et al, 2004;Hillaris et al, 2006). This CME, observed by SOHO/LASCO to start on 7 May 2001, at 10:07 UT, was ejected from a strong closed magnetic field configuration.…”