This mosaic image is composed of 12 individual overlapping fields-of-view recorded at the Dutch Open Telescope. It was recorded during the 2010 DOT Prominence Project by the PROM team of researchers sponsoring the 2011 PROM Workshop. Successive mosaics were recorded for 10 days for the purpose of observing filament channels and filaments forming around the periphery of two relatively new, small active regions. The new filament channel on the left (eastern) side of the mosaic contains a small filament beginning to form. Several other filaments are designated by arrows. All are in filament channels or zones where the magnetic field of the central part of the channel is parallel with the long axis of the filament. Other characteristics of filament channels and their significance will be discussed during the Workshop.

In a single image, surges appear similar to filaments because both have flows along an axis parallel with the local magnetic field. Surges, by definition, are short-lived ejecta, like giant spicules, that emanate and recede from specific locations. In active regions, surges are frequently injected along filament channels and greatly alter the normal mass flows in filaments occupying such channels. This is one of the reasons why some scientists previously thought active region filaments were too complicated to model and, therefore, first attempted to model quiescent filaments. However, the opposite is true and readily demonstrated in high resolution images such as these; the magnetic structure of active region filaments is much simpler than that of quiescent filaments -- a topic that will be discussed in the 2011 PROM Workshop.