SWAP Observations of Post-flare Giant Arches in the Long-Duration 14 October 2014 Solar Eruption

Abstract

On 2014 October 14 the Sun Watcher with Active Pixels and Image Processing EUV solar telescope on board the Project for On Board Autonomy 2 spacecraft observed an eruption that led to the formation of perhaps the largest post-eruptive loop system seen in the solar corona in solar cycle 24. The initial eruption occurred at about 18:30 UT on October 14, behind the east Solar limb, and was observed as a a coronal mass ejection and an M2.2 solar flare. In the 48 hr following the eruption, the associated post-eruptive loops grew to a height of approximately 4× {{10}⁵} km (\gt 0.5 {{R}_⊙ }) at rates between 2 and 6 km {{s}^-1}. We conclude from our observations of this event that ordinary post-eruptive loops and so-called post-flare giant arches are fundamentally the same and are formed by the same magnetic reconnection mechanism.