Physics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..138..361a&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 138, no. 2, April 1992, p. 361-378. Research supported by Slovak Academy of Sciences.
Physics
1
Coronal Loops, H Alpha Line, Solar Flares, Solar Limb, Solar Prominences, Chromosphere, Radio Emission, Solar Activity Effects
Scientific paper
The H-alpha analysis of the development of the strong impulsive and faint gradual phase of the June 26, 1983 flare indicates the following: the flare originated from two microprominences on the southeast border of NOAA 4227; and the main flare structure was a flare cone, which consisted of a bright surge-like stream, elevated above two flare ribbons (located in the cone's base). The flare cone had a height of about 40,000 km and lasted 4 min in H-alpha. The upper part of the cone was terminated by a very fine loop, which was bent to the west, where later a chromospheric brightening occurred at the footpoint of a flaring arch. A 300 keV burst and radio spikes were observed during the maximum flare phase. The flaring arch system, with its apex at a height of about 48,000 km, formed the skeleton for the coronal helmet structure. The velocity of the plasma moving along the flaring arch was between 3500 km/s and 6900 km/s during the first brightening (14:07 UT).
Antalová Anna
Ogir' M. B.
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