Physics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.6961f&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Sept. 1, 1983, p. 6961-6928.
Physics
12
Cosmic Rays, Geomagnetism, Magnetic Disturbances, Europe, Magnetic Rigidity, Particle Trajectories, Ring Currents
Scientific paper
The representative midlatitude neutron monitor stations at Jungfraujoch and Kiel were the sites of the present study of the effect of geomagnetic field local perturbations on vertical cosmic ray cutoff rigidities, using the trajectory-tracing technique in a magnetic field that is modeled as a simple dipole field on which the disturbance field is superposed. Cutoff rigidity variations at Kiel are predominantly due to changes of the geomagnetic field within geocentric distances of 2.5-6 earth radii, while at Jungfraujoch changes in cutoff rigidities are almost exclusively caused by magnetic disturbances within 1-4.5 earth radii. The dependence of the main, effective and Stoermer vertical cutoff rigidities at both locations on the radial, latitudinal and longitudinal structure of the magnetic perturbations is given explicitly. The Treiman (1953) theory is invoked in the discussion of results obtained.
Flueckiger Erwin O.
Shea Margaret Ann
Smart Don Frederick
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