Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.4710n&link_type=abstract
American Astronomical Society Meeting 204, #47.10; Bulletin of the American Astronomical Society, Vol. 36, p.738
Astronomy and Astrophysics
Astronomy
2
Scientific paper
The ISOON system (Improved Solar Observing Optical Network) recorded numerous large flares associated with the disk passage of several highly active regions during late October and early November 2003. Included is the 1947 UT X28 superflare on November 4. Wavelengths covered include hydrogen-alpha (line center and wings) abd 6303 A continuum. Results are presented showing the evolution of the sunspot groups (motions and areas) prior to these flares, as well as the associated phenomena, development, and light curves of the flares themselves. Chromospheric signatures of coronal eruptive events may be evident in the form of nearly simultaneous, widely-spaced flares, brightenings, and propagating disturbances. Several Moreton waves were observed, including one that appears to be a wave train encompassing two or more full wavelengths, with measurable propagation velocity, velocity amplitude, and period.
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