The heliolongitude of the active regions and the time behaviour of the associated forbush decreases

Authors
N. Iucci M. Parisi M. Storini G. Villoresi
Citation
N. Iucci et al., The heliolongitude of the active regions and the time behaviour of the associated forbush decreases, Laboratorio di Ricerca e Tecnologia per lo Studio del Plasma nello Spazio , LPS-73(28), 1973, pp. 1-12
Journal title
Laboratorio di Ricerca e Tecnologia per lo Studio del Plasma nello Spazio → ACNP
ISSN journal
22829210
Volume
LPS-73
Issue
28
Year of publication
1973
Pages
1 - 12
Database
ACNP
SICI code
Abstract
The average time behaviour of a Forbush decrease is found to be dependent on the heliolongitude of the associated solar flare. The Forbush decrease seems to corotate with the sun, that suggesting the existence of closed magnetic lines of force, connected to the sun, which surround the region of interplanetary space involved in the Forbush decrease.