Other
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mwoc.conf..279s&link_type=abstract
Multi-Wavelength Observations of Coronal Structure and Dynamics -- Yohkoh 10th Anniversary Meeting. Proceedings of the conferenc
Other
1
Scientific paper
The Moreton wave is a flare-associated wave observed in H alpha, and is now established to be a fast mode MHD shock emitted from the flare, but the physical mechanism to create the wave is still puzzling. On the other hand, the EIT wave is a newly discovered flare-associated wave observed in EUV with the Extreme ultraviolet Imaging Telescope (EIT) aboard SOHO, and in this case, not only its origin but also its physical property are both puzzling. We study the relationship of these two flare-associated waves, Moreton waves and EIT waves, by analyzing 4 events observed on Nov. 3 and 4, 1997, Aug. 8, 1998, and Mar. 3, 2000 (Narukage et al. 2001). The Moreton waves were observed in Ha, Ha+0.8A and Ha-0.8A with the Flare Monitoring Telescope (FMT) at the Hida Observatory of Kyoto University, while the EIT waves were observed with SOHO/EIT. In the typical case associated with an X-class flare in AR 8100 on 4 November 1997 (Eto et al. 2001) the propagation speeds of the Moreton wave and the EIT wave were approximately 780 km/s and 200 km/s respectively. The data on speed and location show clearly that the Moreton wave differs physically from the EIT wave in this case. The detailed analyses of the other events (Nov. 3, 1997, Aug. 8, 1998, and Mar. 3, 2000) will also be presented, with Yohkoh/SXT data in the lucky case.
Akiyama Sanae
Asai Ayumi
Eto Shigeru
Hudson Hugh S.
Ishii Takaaki
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