Abstract

Abstract. Solar magnetic tornadoes are known to be one of the mass and energy transport mech- anisms from the lower solar atmosphere into the upper layers of the solar corona. A bright spiral structure with two arms is observed using high-cadence EUV images of 171, 193 and 304 A channels of Atmospheric Imaging Assembly (AIA) aboard the So- lar Dynamics Observatory (SDO) on 10th of July 2011 for three hours. The structure studied here looks bright in front of dark background emissions. The rotational energy budget of this tornado is estimated using three di erent approaches. Results showed the rotational energy ranges between 1:951018 erg to 3:361019 erg. After correcting for the solar di erential rotation, the oscillatory behaviour of the structure is studied using FFT technique. Results show four di erent regimes of oscillations: 3-min, 5-6 min, 8-11 min, and 15-17 min. The showed origin of each of these oscillations are discussed. Keywords: Sun: Corona, Sun: Tornado, Sun: UV radiation, Sun: Oscillations