A comparative study of geomagnetic, interplanetary, and cosmic ray storms
Journal Article
·
· J. Geophys. Res.; (United States)
Major geomagnetic storms (Dst change exceeding 60 ..gamma..) and cosmic ray storms (changes exceeding 3% for the Alert neutron monitor) are compared for the period November 1956 through August 1973. The parameters of the two phenomena show virtually no intercorrelation. Interplanetary disturbances, characterized by enhanced number density and speed of solar wind and enhanced magnetic field, are responsible For both these phenomena. for cosmic ray storms, only an interplanetary magnetic blob seems in general to be necessary. However, the quantitative relationship between the total magnetic field and cosmic ray storm magnitudes is poor, and occasionally large blobs produce very small cosmic ray effects or vice versa, often not simultaneously. It is surmised that the blobs as recorded by the present day space probes (confined near th ecliptic plane) are only crude indicators of the main configurations (perhaps magnetic bottles) that cause the cosmic ray changes, with their cores not always hitting the earth directly. For geomagnetic storms the most important parameter seems to be the B/sub z/ (southward) component of th interplanetary magnetic field, which may or may not have any relation to the other characteristics of the blob. Several other details are discussed.
- Research Organization:
- Physical Research Laboratory, Ahmedabad 9, India
- OSTI ID:
- 7230265
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 82:4; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIATION
FORBUSH DECREASE
INTERPLANETARY MAGNETIC FIELDS
IONIZING RADIATIONS
MAGNETIC FIELDS
MAGNETIC STORMS
PLASMA DENSITY
PLASMA DRIFT
RADIATIONS
SOLAR ACTIVITY
SOLAR WIND
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIATION
FORBUSH DECREASE
INTERPLANETARY MAGNETIC FIELDS
IONIZING RADIATIONS
MAGNETIC FIELDS
MAGNETIC STORMS
PLASMA DENSITY
PLASMA DRIFT
RADIATIONS
SOLAR ACTIVITY
SOLAR WIND