NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Enhanced interplanetary magnetic fields as the cause of Forbush decreasesA strong correlation is observed between neutron monitor variations and variations in the interplanetary magnetic field intensity. It is thought that the cosmic ray intensity depressions are caused by perpendicular gradient drifts. The perpendicular gradient drift velocity for particles with energies exceeding 500 MeV in a magnetic field configuration produced by a representative stream is at least a few times the solar wind velocity. Thus particles can be swept away from the ecliptic by such a blob faster than the blob advances. It is suggested that this mechanism might be the cause of Forbush decreases and other cosmic ray variations near 1 AU.
Document ID
19760043946
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Burlaga, L. F.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Barouch, E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Astrophysics
Meeting Information
Meeting: International Cosmic Ray Conference
Location: Munich
Start Date: August 15, 1975
End Date: August 29, 1975
Accession Number
76A26912
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available