Sunspot proper motion of individual sunspot in active region 11429 during X5.4 solar flare on March 7, 2012
Herdiwijaya D.a, Permata K.a
a Astronomy Research Group and Bosscha Observatory, Institute Technology of Bandung, Ganesha 10 Bandung, 40132, Indonesia
Abstract
© Published under licence by IOP Publishing Ltd.Based on high resolution images obtained from Helioseismic and Magnetic Imager (HMI) instrument onboard Solar Dynamic Observatory (SDO) satellite at visual wavelength, we traced several individual umbral sunspots to find drift motion during flare occurrences within Active Region (AR) 11429 (N17, E15) at 00:00 to 05:00 UT on March 7, 2012. AR11429 was a large sunspot group with 1270 millionth solar hemisphere in area and complex magnetic morphology with beta-gamma-delta class. We measured relative motion of 22 umbral sunspots positions during eruptive and post-flare phases for about 5 hours. Some sunspots showed faster motion during eruptive phase at about 10% than decay phase and they moved nearly along the magnetic field polarity inversion line that showed shear motion. Flare outburst which is occurred in corona layer affected sunspot motion and area, as seen for their changing configuration and morphology, before and after peaked X-ray intensity. This result indicates that there is a strong connection between X-ray solar flare at corona layer and its foot points motion at photosphere.
Author keywords
Active regions,High resolution image,Polarity inversion lines,Proper motion,Relative motion,Solar dynamic,Visual wavelength,X ray intensity
Indexed keywords
Funding details
This work was supported by ITB Research Fund (P3MI-ITB) year 2018.