Overview of the filament and its subsequent eruption. (a) SMART Hα observation showing the stable filament. The red and blue contours represent positive and negative polarities from the simultaneous line-of-sight magnetogram at levels of ±50 G, respectively. (b) NVST Hα observation revealing the filament’s fine structure. The white arrows indicate filament threads and barbs, and dashed lines mark the orientation of the barbs. (c) Magnetic environment of the filament. Blue and red boxes delineate regions of relatively weaker (∼100 G) and stronger (∼1000 G) magnetic fields, respectively. (d) The erupting middle filament segment captured in AIA 304 Å during the early phase of eruption. (e) Erupting filament observed from the STEREO perspective. (f) Running-difference images of a CME observed by the STEREO/COR2 white-light coronagraph, with STEREO EUVI 304 Å image. (g) GOES soft X-ray flux profiles. Red and blue curves show 1–8 and 0.5–4 Å fluxes, respectively. (An animated version of this figure is available; the animation lasts 6 s and presents the oscilLatory filament eruption in the FOV of panel (d) in AIA 171, 304, and 193 Å, together with XRT soft X-ray images, and also shows the subsequent eruption and CME from the STEREO limb perspective.)

(An animation of this figure is available in the online article.)

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.