Physics
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...56..359k&link_type=abstract
Solar Physics, vol. 56, Feb. 1978, p. 359-373.
Physics
6
Solar Flares, Solar Protons, Solar Radio Emission, Solar Radio Bursts, Solar Terrestrial Interactions
Scientific paper
The investigation of solar radio emission fluctuations at the wavelength lambda approximately equal to 3 cm led to the discovery of a visible increase in pulsations with periods of about 30-120 min prior to proton flares. These pulsations were observed before all (seven) proton flares included in the cycle of observations from 1969 to 1974. The phenomenon was not found to occur before nonproton flares. The assumption is made that the observed pulsations are a manifestation of preflare instability in coronal structures. Estimations have been made for fluctuations of the gyroresonance radiation from the regions above spots associated with the magnetic field variations when a groove instability of a coronal condensation is developed. They are in good agreement with the observational data. The discovered manifestation of the preflare instability in fluctuations of the solar radio emission open new ways to study the flare development and to predict geoeffective phenomena on the sun.
Arbuzov S. I.
Fridman V. M.
Kobrin M. M.
Korshunov A. I.
Pakhomov V. V.
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