Some propertries of flare-not-associated Forbush decreases

Details Some propertries of flare-not-associated Forbush decreases Some propertries of flare-not-associated Forbush decreases

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ncimc...7..722i&link_type=abstract

(Convegno Nazionale di Fisica Cosmica, 2nd, l'Aquila, Italy, May 29-June 1, 1984) Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol

Physics

3

Cosmic Rays, Energetic Particles, Forbush Decreases, Interplanetary Magnetic Fields, Particle Acceleration, Solar Flares, Proton Energy, Solar Wind

Scientific paper

All the flare-not-associated Forbush decreases (NAFDs) during 1957-1979 are investigated. The close correlation between NAFD occurrence and the central meridian passage of strong active regions producting large flare-associated FDs is shown to confirm the flare origin of NAFDs. Interplanetary perturbations at the eastern and western boundaries of the modulated region are found to be long-lived (not less than 2 solar rotations) corotating structures. These structures appear to coincide with the boundaries of the region in which 1-4-MeV protons accelerated by interplanetary flare-generated shocks are confined.

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