Solar Physics

, Volume 175, Issue 2, pp 601–612

Eit and LASCO Observations of the Initiation of a Coronal Mass Ejection

  • K. P. Dere
  • G. E. Brueckner
  • R. A. Howard
  • M. J. Koomen
  • C. M. Korendyke
  • R. W. Kreplin
  • D. J. Michels
  • J. D. Moses
  • N. E. Moulton
  • D. G. Socker
  • O. C. St. Cyr
  • J. P. Delaboudinière
  • G. E. Artzner
  • J. Brunaud
  • A. H. Gabriel
  • J. F. Hochedez
  • F. Millier
  • X. Y. Song
  • J. P. Chauvineau
  • J. P. Marioge
  • J. M. Defise
  • C. Jamar
  • P. Rochus
  • R. C. Catura
  • J. R. Lemen
  • J. B. Gurman
  • W. Neupert
  • F. Clette
  • P. Cugnon
  • E. L. Van Dessel
  • P. L. Lamy
  • A. Llebaria
  • R. Schwenn
  • G. M. Simnett
Article

DOI: 10.1023/A:1004907307376

Cite this article as:
Dere, K.P., Brueckner, G.E., Howard, R.A. et al. Sol Phys (1997) 175: 601. doi:10.1023/A:1004907307376

Abstract

We present the first observations of the initiation of a coronal mass ejection (CME) seen on the disk of the Sun. Observations with the EIT experiment on SOHO show that the CME began in a small volume and was initially associated with slow motions of prominence material and a small brightening at one end of the prominence. Shortly afterward, the prominence was accelerated to about 100 km s-1 and was preceded by a bright loop-like structure, which surrounded an emission void, that traveled out into the corona at a velocity of 200–400 km s-1. These three components, the prominence, the dark void, and the bright loops are typical of CMEs when seen at distance in the corona and here are shown to be present at the earliest stages of the CME. The event was later observed to traverse the LASCO coronagraphs fields of view from 1.1 to 30 R⊙. Of particular interest is the fact that this large-scale event, spanning as much as 70 deg in latitude, originated in a volume with dimensions of roughly 35" (2.5 x 104 km). Further, a disturbance that propagated across the disk and a chain of activity near the limb may also be associated with this event as well as a considerable degree of activity near the west limb.

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • K. P. Dere
    • 1
  • G. E. Brueckner
    • 1
  • R. A. Howard
    • 1
  • M. J. Koomen
    • 1
    • 2
  • C. M. Korendyke
    • 1
  • R. W. Kreplin
    • 1
    • 3
  • D. J. Michels
    • 1
  • J. D. Moses
    • 1
  • N. E. Moulton
    • 1
    • 4
  • D. G. Socker
    • 1
  • O. C. St. Cyr
    • 1
    • 5
  • J. P. Delaboudinière
    • 6
  • G. E. Artzner
    • 6
  • J. Brunaud
    • 6
  • A. H. Gabriel
    • 6
  • J. F. Hochedez
    • 6
  • F. Millier
    • 6
  • X. Y. Song
    • 6
  • J. P. Chauvineau
    • 7
  • J. P. Marioge
    • 7
  • J. M. Defise
    • 8
  • C. Jamar
    • 8
  • P. Rochus
    • 8
  • R. C. Catura
    • 9
  • J. R. Lemen
    • 9
  • J. B. Gurman
    • 10
  • W. Neupert
    • 10
  • F. Clette
    • 11
  • P. Cugnon
    • 11
  • E. L. Van Dessel
    • 11
  • P. L. Lamy
    • 12
  • A. Llebaria
    • 12
  • R. Schwenn
    • 13
  • G. M. Simnett
    • 14
  1. 1.Naval Research Laboratory Washington D.C.E.O. Hulburt Center for Space ResearchU.S.A
  2. 2.Sachs Freeman AssocUSA
  3. 3.Universities Space Research AssocUSA
  4. 4.Allied Signal CorpUSA
  5. 5.Computational Physics IncUSA
  6. 6.Institut d'Astrophysique SpatialUniversitéOrsayFrance
  7. 7.Institut d'Optique Théorique et AppliquéeOrsayFrance
  8. 8.Centre Spatial de LiègeLiègeBelgium
  9. 9.Lockheed Martin Palo Alto Research LaboratoryPalo AltoU.S.A
  10. 10.Nasa Goddard Space Flight CenterGreenbeltU.S.A
  11. 11.Observatoire Royal de BelgiqueBrusselsBelgium
  12. 12.Laboratoire d'Astronomie SpatialeMarseilleFrance
  13. 13.Max-Planck-Institut für AeronomieLindauGermany
  14. 14.Space Research Group, School of Physics and Space ResearchUniversity of BirminghamBirminghamU.K