After observing the quiet Sun during a long and deep minimum, Hinode's observing priority is now the active Sun, i.e., flares and active regions. Because of its small field-of-view instruments and telemetry restrictions, capturing major flares with good observing coverage needs challenging efforts on operation plannings for Hinode and we have been using the latest available AIA and HMI full-Sun images for targeting. Also, capturing the initial phase of large-scale emerging flux activities is not easy for Hinode without having the forecast of flux emergence before they are visible on the surface. Nevertheless, Hinode has some good examples of observations of such events. In this paper, we briefly discuss two specific observations; X-class flares in March 2012 and a large-scale flux emergence in December 2009. The Stokes polarimetry data for the flares presented in this paper reveals significant gas flows along the neutral line of the sheared magnetic distributions and the change of magnetic field inclination at the areas where penumbral development and disappearance was observed with the occurrence of the flares. The flux emergence and the sunspot formation presented were well monitored by the Hinode three telescopes from the beginning through the end of the emergence, Of particular interest is the finding of a precursory signature in the chromosphere preceding the appearance of sunspot penumbra.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Multi-Wavelength Observations of the Flares in NOAA 8307 Active Region

    Siarkowski, M. / Rudawy, P. / Berlicki, A. et al. | British Library Conference Proceedings | 2002


    Flares in Active Region NOAA 7260

    Nitta, N. / Van Driel-Gesztelyi, L. / Leka, K. D. et al. | British Library Conference Proceedings | 1994


    Flares and jets caused by flux emergence

    Hanaoka, Y. | British Library Online Contents | 1998


    Homologous flares and the evolution of NOAA active region 2372

    Strong, K.T. / Smith, J.B. Jr. / McCabe, M.K. et al. | Elsevier | 1984


    Homologous flares and the evolution of NOAA Active Region 2372

    Strong, K. T. / Smith, J. B., Jr. / Mccabe, M. K. et al. | NTRS | 1984