Prominence instability and CMEs triggered by massive coronal rain in the solar atmosphere

Context. The triggering process for prominence instability and consequent coronal mass ejections (CMEs) is not fully understood. Prominences are maintained by the Lorentz force against gravity; therefore, reduction of due to rain may cause change balance hence destabilisation structures. Aims. We aim study observational evidence influence on stability subsequent eruption CMEs. Methods. used simultaneous observations from Atmospheric Imaging Assembly (AIA) Solar Dynamics Observatory (SDO) Sun Earth Connection Coronal Heliospheric Investigation (SECHHI) Terrestrial Relations (STEREO) spacecrafts different angles follow dynamics role in their destabilisation. Results. Three prominences observed during years 2011–2012 were analysed using acquired SDO STEREO. In all three cases, massive body led subsequently upward rising consisted slow fast rise phases. triggered initial prominences, which final (the phase) after 18–28 h cases. estimated flux carried blobs showed that became unstable 40% loss. Conclusions. suggest phase was loss rain, while prominences) caused torus and/or magnetic reconnection with overlying field. Therefore, If this case, then can be predict CMEs improve space weather predictions.