Computer Science
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.346..289h&link_type=abstract
In ESA, Study of the Solar-Terrestrial System p 289-293 (SEE N93-31674 12-90)
Computer Science
3
Coronagraphs, Electric Corona, Goes Satellites, Solar Corona, Solar Energy, Solar Flares, Statistical Correlation, Stellar Mass Ejection, Data Processing, Solar Magnetic Field
Scientific paper
An attempt to identify purely formal correlations between parameters relating to flare and mass ejection observations during the period 1986 to 1987 is reported. A typical solar Coronal Mass Ejection (CME) occurs on a very large spatial scale (typical width 45 deg) and involves the expulsion of up to 10 to the 12th power kg, and the release of up to 10 to the 25th power J from the coronal magnetic field. A solar flare is an explosive event at the base of the atmosphere involving the release of up to 10 to the 25th power J of energy. Several large datasets were compared using the CME event lists from the Solar Maximum Mission coronagraph. Flare activity of the same period was examined using the GOES 1 to 8 A soft x-ray profiles. These are full Sun and thus, suffer from event superposition. Unlike previous studies, flares were identififed by changes in the x-ray profile rather than threshold crossings, and the background intensity is subtracted when the flare intensity is reported. The H alpha flare listings were used to identify the locations of the x-ray flare activity. In spite of a strong association between flares and CME onsets, no single type of flare shows preferred association with mass ejections and the relative locations and timing of the two phenomena show no systematic ordering.
Harrison Richard A.
Sime D. G.
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