Solar flares - Geoeffectiveness and the possibility of a new classification

Details Solar flares - Geoeffectiveness and the possibility of a new classification Solar flares - Geoeffectiveness and the possibility of a new classification

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..189e&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, Feb. 1990, p. 189-206.

Physics

10

Solar Flares, Solar X-Rays, Current Sheets, Emission Spectra, Shock Waves, Solar Wind, Wave Interaction

Scientific paper

In this paper it is shown that, according to a parameter of X-ray emission, flares can be be divided into three classes: weak, moderate, and strong. In this case, (1) weak flares are never sources of SSC; (2) shock waves from moderate flares propagate along the heliospheric current sheet (HCS) because outside the HCS the conditions for their excitation do not seem to be satisfied; and (3) strong flares are able to excite shock waves outside the HCS as well. It is shown that the character of excitation of shock waves in the HCS substantially depends on the flares' location with respect to the neutral line on the sun.

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