We investigate the high-speed ( v > 1000 km s ^ { -1 } ) extreme-ultraviolet ( EUV ) wave associated with an X1.2 flare and coronal mass ejection ( CME ) from NOAA active region 11283 on 2011 September 6 ( SOL2011-09-06T22:12 ) .
This EUV wave features peculiar on-disk signatures , in particular we observe an intermittent “ disappearance ” of the front for 120 s in SDO/AIA 171 , 193 , 211 Å data , whereas the 335 Å filter , sensitive to hotter plasmas ( T \sim 2.5 MK ) , shows a continuous evolution of the wave front .
The eruption was also accompanied by localized coronal dimming regions .
We exploit the multi-point quadrature position of SDO and STEREO-A , to make a thorough analysis of the EUV wave evolution , with respect to its kinematics and amplitude evolution and reconstruct the SDO line-of-sight ( LOS ) direction of the identified coronal dimming regions in STEREO-A .
We show that the observed intensities of the dimming regions in SDO/AIA depend on the structures that are lying along their LOS and are the combination of their individual intensities , e.g .
the expanding CME body , the enhanced EUV wave and CME front .
In this context , we conclude that the intermittent disappearance of the EUV wave in the AIA 171 , 193 , 211 Å filters , which are channels sensitive to plasma with temperatures below \sim 2 MK is also caused by such LOS integration effects .
These observations clearly demonstrate that single-view image data provide us with limited insight to correctly interpret coronal features .