References

Brekke, P., G. J. Rottman, J. Fontenla, and P. G. Judge (1996), The ultravioletspectrum of a 3B class flare observed with SOLSTICE, Astrophys. J., 468, 418.

Chen, J., H. Wang, H. Zirin, and G. Ai (1994), Observations of vector magnetic fields in flaring active region, Solar Phys., 154, 261.

Choudhary, D. P., A. Ambastha, and G. Ai (1998), Emerging flux and X-class flares in NOAA 6555, Solar Phys., 179, 133.

Contarino, L., P. Romano, M. Ternullo, and F. Zuccarello (2002), Characteristics of sunspot-groups hosting M and X flares, 1st Potsdam Thinkshop on Sunspots and Starspots, Poster Proceedings, AIP, 33.

Fontenla, J. M., A. Ambastha, B. Kalman, and Gy. Csepura (1995), The magnetic evolution of AR 6555 which led to two impulsive, relatively compact, X-type flares, Astrophys. J., 440, 894.

Gaizauskas, V., K. L. Harvey, and M. Proulx (1994), Interactions between nested sunspots. 1: The formation and breakup of a delta-type sunspot, Astrophys. J., 422, 883.

Jain, R. (1986), A new approach for predicting proton events, Mon. Nonic. RAS, 223, 877.

Kahler, S. W., E. W. Cliver, H. V. Cane, R. E. McGuire, R. G. Stone, and N. R. Shelley, Jr. (1986), Solar filament eruptions and energetic particle events, Astrophys. J., 302, 504.

Kalman, B. (1997), Flow patterns around old sunspots and flare activity, Astrophys. J., 327, 779.

Künzel, H. (1960), Die Flare-Haüfigkeit in Fleckengruppen unterschiedlicher. Klasse und magnetischer Structur, Astron. Nach., 285, 271.

Liu, Y., and H. Zhang (2001), Relationship between magnetic field evolution and major flare event on July 14, 2000, Astron. Astrophys., 372, 1019.

Makarova, E. A., N. G. Bochkarev, G. A. Porfir'eva, A. B. Delone, and G. V. Yakunina (2001), Flare-productive active regions: large d-configurations on the Sun, Proc. of SSAI (in Russian), 71, 107.

Sakurai, T. K., K. Ichimoto, E. Hiei, M. Irie, K. Kumagai, M. Miyashita, Y. K. Nishino Jamaguchi, G. Fang, M. A. Kambry Zhang, and Zh. K. Shinoda (1992), White-light flares of 1991 June in the NOAA region 6659, PASJ, 44, L7.

Sammis, I., F. Tang, and H. Zirin (2000), The dependence of large flare occurrence on the magnetic structure of sunspots, Astrophys. J., 540, 583.

Shea, M. A., and D. F. Smart (1990), A summary of major solar proton events, Solar Phys., 127, 297.

Spirock, T. J., V. B. Yurchyshyn, and H. Wang (2002), Rapid changes in the longitudinal magnetic field related to the 2001 April 2 X20 flare, Astrophys. J., 572, 1072.

Su, K. J., Y.-Y. Deng, K. K. Sok, and K. J. Song (2001), A correlation between proton events and Ha flares and its possible interpretation, Chin. J. Astron. Astrophys., 1, 537.

Tanaka, K. (1991), Studies on a very flare-active delta group-peculiar delta spot evolution and inferred subsurface magnetic rope structure, Solar Phys., 136, 133.

Tang, F. (1983), On the origin of delta spots, Solar Phys., 89, 43.

Tang, F., and H. Wang (1993), On the dynamic activity in sheared corridors of large delta spots, Solar Phys., 143, 107.

Uddin, W., M. C. Pande, and V. K. Verma (1990), On the association of solar proton events with other flare manifestations, Bull.Astron. Inst. Czechosl., 41, 374.

Van Driel-Gesztelyi, L., G. Csepura, B. Schmieder, J.-M. Malherbe, and T. Metcalf (1997), Evolution of a delta group in the photosphere and corona, Solar Phys., 172, 151.

Wang, H., F. Tang, H. Zirin, and G. Ai (1991), Motions fields and flares in the 1989 March active region, Astrophys. J., 380, 282.

Warwick, C. (1966), Sunspots configurations and proton flares, Astrophys. J., 145, 215.

Watanabe, T., M. Kojima, and M. Tokumaru (2000), Interplanetary disturbances through the minimum to the maximum solar activities, Adv. Space Res., 25, 1951.

Zhang, H. (1995a), Configuration of magnetic shear and vertical current in active region (NOAA 5395) in 1989 March, Astron. Astrophys. Suppl. Ser., 111, 27.

Zhang, H. (1995b), Magnetic shear of a large delta sunspot group (NOAA 6659) in June 1991, Astron. Astrophys., 297, 868.

Zhang, H., G. Ai, X. Jun, W. Li, and Y. Liu (1994), Evolution of vector magnetic field and white-light flares in a solar active region (NOAA 6659) in 1991 June, Astron. Astrophys., 423, 828.

Zhou, S. R., and X. W. Zheng (1998), Common characteristics of the active regions of strong proton flares, Solar Phys., 181, 327.

Zirin, H., and M. A. Liggett (1987), Delta spots and great flares, Solar Phys., 113, 267.

Zirin, H., and H. Wang (1993), Strong transverse fields in delta-spots, Solar Phys., 144, 37.


AGU