Japan Geoscience Union Meeting 2015

Presentation information

International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM07] Space Weather, Space Climate, and VarSITI

Mon. May 25, 2015 9:00 AM - 10:45 AM 302 (3F)

Convener:*Ryuho Kataoka(National Institute of Polar Research), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Yoshizumi Miyoshi(Solar-Terrestrial Environement Laboratory, Nagoya University), Toshifumi Shimizu(Institute of Space and Astronautical Science, JAXA), Ayumi Asai(Unit for Synergetic Studies of Space, Kyoto University), Hidekatsu Jin(National Institude of Information and Communications Technology), Tatsuhiko Sato(Japan Atomic Energy Agency), Kanya Kusano(Solar-Terrestrial Environment Laboratory, Nagoya University), Hiroko Miyahara(College of Art and Design, Musashino Art University), Takuji Nakamura(National Institute of Polar Research), Kazuo Shiokawa(Solar-Terrestrial Environment Laboratory, Nagoya University), Kiminori Itoh(Graduate School of Engineering, Yokohama National University), Chair:Kazuo Shiokawa(Solar-Terrestrial Environment Laboratory, Nagoya University)

10:00 AM - 10:15 AM

[PEM07-10] Homologous flare occurred at the quadrupole field

*Yusuke KAWABATA1, Toshifumi SHIMIZU2 (1.Department of Earth and Planetary Science, The University of Tokyo, 2.Institute of Space and Astronautical Science, JAXA)

Keywords:solar flare, magnetic reconnection

Many models of the solar flare are suggested and they can explain some of the observed flares. However, they cannot explain all of the observed flares. The purpose of our study is investigating such events. We focus on homologous flares, which occur at the same location in the same active region repeatedly. We used Solar Optical Telescope (SOT) on board HINODE and Atmospheric Imaging Assembly (AIA) on board Solar Dynamics Observatory (SDO). We can obtain three dimensional vector of the magnetic field by using the spectropolarimetric data of SOT and investigate the coronal configurations by using the extreme ultraviolet data of AIA. We analyze the active region NOAA 11967 which produced three M class flares on 2014 February 2. These flares show homology and the magnetic field at the flaring region is quadrupole. There were four flare ribbons and they showed rapid slipping motion. The photospheric flow can be seen between the sunspot and this flow may play a role in storing free energy and triggering the flare.