The research group at Kwasan observatory, using data from the Kepler satellite, discovered more than 360 examples of superflares (flares that are 100 to 1000 times larger than the biggest solar flare) on solar-type stars. This research was published on the 17th May 2012 in the scientific journal Nature.

• Kyoto University Press Release (Kyoto University Homepage - Japanese Only)
• Nature (Published Paper)
• Nature News (Commentary)

Between 2008 and 2009, the number of sunspots observed on the solar surface was at its lowest for 100 years, but recently there has been a sudden surge in solar activity and the current cycle (cycle 24) is producing large flares (huge releases of energy in the solar atmosphere). At Hida Observatory, solar flare monitoring observations have been taking place and on 9th August 2011 and 7th and 8th September 2011 (JST) large flares could be observed.

• Kyoto University News Release (to the Kyoto University page)
• Presentation and movies

If you plan to use any of the movies or images, first read the Observatory webpage data policy.

A research group including Professor Kazunari Shibata and Andrew Hillier (Graduate Student) of Kwasan Observatory discovered that convection is occurring in solar prominences. The results from this research were published in the leading scientific journal "Nature".

• Kyoto University News Release (to the Kyoto University page --Japanese only)
• JST Science News (To the "Science Channel" homepage)

This workshop took place at Hida Observatory and the National Astronomical Observatory of Japan (Mitaka) during July, 2011.
Using the multiple wavelength observations of the solar surface, taken as part of the CHAIN project, this workshop involved research discussions, data analysis and writing of research papers. Moreover, using Coelostat Spectroscopes as well as other equipment, practice of solar spectroscopic observations was used to build the observational knowhow of the participants.

• Workshop homepage
• CHAIN homepage

We examine in detail the evolution of an anemone active region (AR) that emerged in a Coronal Hole and the related flares, CMEs, and the geomagnetic storm to elucidate how such a magnetic configuration works to generate a geo-effective flares/CMEs. We found that the fast CMEs are probably a consequence of the eruption inside a Coronal Hole from an sea anemone AR, and discuss the importance of ARs that show the anemone structure for the space weather studies.

Asai, A. et al. (2009)
The Journal of Geophysical Research, 114, A00A21, doi:10.1029/2008JA013291.  

Abstract / Article on web(JGR web-page)

We discovered three successive Moreton waves generated by a single solar flare. These waves were observed on 3 August 2005 with Solar Magnetic Activity Research Telescope (SMART) at Hida Observatory of Kyoto University.

Narukage, N. et al.
The Astrophysical Journal Letters, 684: L45--L49 (2008) 

Abstract / Movies
Full article on web(ApJL web-page)

about SMART / SMART Data Archive

(1) Chromospheric Anemone Jets as Evidence of Ubiquitous Reconnection
Shibata, K. et al.
Science vol.318, No.5856, pp1591--1594 (2007)   Abstract

The Ca II H broadband filter snapshot image of the active region on 17 December 2006 near the west limb, taken with Hinode/SOT. Numerous tiny jets ejected from bright points (arrows) can be seen.

Link to Science web-page   Full article on web / PDF file

(2) Umbral Fine Structures in Sunspots Observed with Hinode Solar Optical Telescope
Kitai, R. et al.
Publ. Astron. Soc. Japan vol.59, No.SP3, ppS585--S591 (2007)

(3) Small-Scale Magnetic-Flux Emergence Observed with Hinode Solar Optical Telescope
Otsuji, K. et al.
Publ. Astron. Soc. Japan vol.59, No.SP3, ppS649--S654 (2007)

Link to PASJ web-page   Title list / Kitai et al. / Otsuji et al.