Homologous large‐scale activity in solar eruptive events of 24–26 November 2000

[1] We study large-scale activity on the solar disk associated with a 24–26 November 2000 series of six recurrent major flares and “halo” coronal mass ejections (CMEs). The analysis is based mainly on the SOHO/EIT data, particularly by using properly rotated difference full-disk images with 12-min intervals at 195 A as well as with 6-hour intervals at 171, 195, 284, and 304 A. We demonstrate that these eruptive events were homologous not only by their flare and CME characteristics, as Nitta and Hudson [2001] showed, but also in terms of their large-scale CME-associated manifestations in the EUV corona. These include long and narrow channeled dimmings, some transequatorial; anisotropic coronal waves, propagating in a restricted angular sector; and additional quasi-stationary emitting fronts. As a whole, in all of these six events, the homologous CME-associated disturbances covered a considerable portion of the solar disk. The homology tendency appears to be due to significant disturbance, partial eruption, and relatively fast restoration of the same large-scale structures involved in the repeating CME events. We briefly discuss the implications of the analysis in connection with the nature of coronal equilibrium.

[1]  H. Hudson,et al.  SOHO EIT Observations of Extreme-Ultraviolet “Dimming” Associated with a Halo Coronal Mass Ejection , 1999 .

[2]  W. Neupert,et al.  EIT: Extreme-ultraviolet Imaging Telescope for the SOHO mission , 1995 .

[3]  C. J. Wolfson,et al.  The Solar Oscillations Investigation - Michelson Doppler Imager , 1995 .

[4]  K. Kai,et al.  The Hard X-ray Telescope (HXT) for the SOLAR-A mission , 1991 .

[5]  J. Owens,et al.  The Soft X-ray Telescope for the SOLAR-A mission , 1991 .

[6]  Hugh S. Hudson,et al.  Recurrent flare/CME events from an emerging flux region , 2001 .

[7]  L. Harra,et al.  Location of the source of soft X-ray non-thermal line broadenings in a solar flare , 2000 .

[8]  M. Altschuler,et al.  Flare-produced coronal MHD-fast-mode wavefronts and Moreton's wave phenomenon , 1973 .

[9]  Jay A. Bookbinder,et al.  The transition region and coronal explorer , 1998 .

[10]  V. Grechnev,et al.  Large-scale dimmings produced by solar coronal mass ejections according to SOHO/EIT data in four EUV lines , 2003 .

[11]  C. Delannée.  Another View of the EIT Wave Phenomenon , 2000 .

[12]  V. Grechnev,et al.  Solar large-scale channeled dimmings produced by coronal mass ejections , 2003 .

[13]  Timothy D. Pope,et al.  The Solar Oscillation Investigation - Michelson Doppler Imager (SOI-MDI) , 1993 .

[14]  S. Kahler.  The morphological and statistical properties of solar X-ray events with long decay times , 1977 .

[15]  Haimin Wang,et al.  Core and Large-Scale Structure of the 2000 November 24 X-Class Flare and Coronal Mass Ejection , 2002 .

[16]  B. Au,et al.  Eit Observations of the Extreme Ultraviolet Sun , 1997 .

[17]  V. Domingo,et al.  The SOHO mission: An overview , 1995 .

[18]  Barbara J. Thompson,et al.  Interaction of EIT Waves with Coronal Active Regions , 2001 .

[19]  J. B. Gurman,et al.  SOHO/EIT observations of an Earth‐directed coronal mass ejection on May 12, 1997 , 1998 .

[20]  P. Lamy,et al.  The Large Angle Spectroscopic Coronagraph (LASCO) , 1995 .

[21]  P. Lamy,et al.  The Large Angle Spectroscopic Coronagraph (LASCO) , 1995 .

[22]  Jean-Pierre Delaboudiniere,et al.  SOHO/EIT Observations of the 1997 April 7 Coronal Transient: Possible Evidence of Coronal Moreton Waves , 1999 .

[23]  R. Howard,et al.  The observation of a coronal transient directed at earth , 1982 .

[24]  N. Gopalswamy,et al.  Early life of coronal mass ejections , 2000 .

[25]  H. Hudson,et al.  Homologous sudden disappearances of transequatorial interconnecting loops in the solar corona , 2000 .

[26]  N. Crooker,et al.  Coronal Mass Ejections: Crooker/Coronal Mass Ejections , 1997 .

[27]  E. Priest,et al.  Quasi-Separatrix layers in solar flares. I. Method. , 1996 .

[28]  Carolus J. Schrijver,et al.  Coronal Loop Oscillations Observed with the Transition Region and Coronal Explorer , 1999 .