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Longitudinal dependence of the interplanetary perturbation produced by energetic type 4 solar flares and of the associated cosmic ray modulationOne of the most significant features of the flare-associated Forbush decreases (Fds) in the galatctic cosmic ray (c.r.) is the so-called East-West asymmetry: the solar flares (Sfs) observed in the Eastern or central region of the solar disk exhibit a higher probability to cause large Fds than the Sfs occurring in the Western portion of the disk. In particular the interplanetary perturbations generated by Type IV Sfs depress the c.r. intensity in a vast spiral cone-like region (modulated region) which extends along the interplanetary magnetic field from the neighborhood of the active region to the advancing perturbation, and that, immediately after the flare-generated perturbation, the maximum c.r. modulation is observed between 0 and 40 deg. W of the meridian plane crossings the flare site at time of flare (flare's meridian plane).
Document ID
19850026746
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Iucci, N. (Consiglio Nazionale delle Ricerche Rome, Italy)
Parisi, M. (Consiglio Nazionale delle Ricerche Rome, Italy)
Storini, M. (Consiglio Nazionale delle Ricerche Rome, Italy)
Villoresi, G. (Consiglio Nazionale delle Ricerche Rome, Italy)
Pinter, S. (Slovak Academy of Sciences Hurbanovo, Czechoslovakia)
Date Acquired
August 12, 2013
Publication Date
August 1, 1985
Publication Information
Publication: 19th Intern. Cosmic Ray Conf - Vol. 5
Subject Category
Solar Physics
Report/Patent Number
SH-5.1-5
Accession Number
85N35059
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19850026678Collected WorksNineteenth International Cosmic Ray Conference. SH Sessions, Volume 5
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