  On 14 October 2014 the Sun Watcher with Active Pixels and Image Processing
(SWAP) EUV solar telescope on-board the Project for On-Board Autonomy 2
(PROBA2) 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 14 October, behind the
East Solar limb, and was observed as a a coronal mass ejection and an M2.2
solar flare. In the 48 hours following the eruption, the associated
post-eruptive loops grew to a height of approximately 400000 km (>0.5
solar-radii) at rates between 2-6 km/s. 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.

Solar and Stellar Astrophysics