How Can a Erupting Sigmoid Trigger Solar Flare with Parallel and Large–Scale Quasi–Circular Ribbons?

Navin Chandra Joshi1, Chang Liu2, Xudong Sun3, Haimin Wang4, Tetsuya Magara1 and Yong-Jae Moon5, (1)Kyung Hee University, Yongin, Korea, Republic of (South), (2)New Jersey Institute of Technology, Newark, NJ, United States, (3)Stanford University, Stanford, United States, (4)New Jersey Institute of Technology, Edison, NJ, United States, (5)School of Space Research, Kyung Hee University, Yongin, South Korea