Effect of local perturbations of the geomagnetic field on cosmic ray cutoff rigidities at Jungfraujoch and Kiel

Journal Article · Thu Sep 01 04:00:00 EDT 1983 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA088iA09p06961· OSTI ID:5470622

Flueckiger, E O; Smart, D F; Shea, M A

We have investigated the effect of local perturbations of the geomagnetic field on the vertical cosmic ray cutoff rigidities at Jungfraujoch and Kiel as representative mid-latitude neutron monitor stations. The main, effective, and Stoermer vertical cutoff rigidities and their changes were determined by utilizing the trajectory-tracing technique in a magnetic field which is modeled as a simple dipole field to which the disturbance field is superposed. It was found that the cosmic ray cutoff rigidities are most sensitive to variations of the z component of the geomagnetic field at geomagnetic latitudes -20/sup 0/<..lambda..<+30/sup 0/ and at longitudes within 90/sup 0/ to the east of these northern hemisphere stations. Furthermore, cutoff rigidity variations at Kiel are predominantly due to changes of the geomagnetic field within geocentric distances 2.5R/sub E/

• Research Organization: Physikalisches Institut, Universitaet Bern
• OSTI ID: 5470622
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 88:A9; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIATION
COSMIC RAY FLUX
CURRENTS
ELECTRIC CURRENTS
GEOGRAPHICAL VARIATIONS
GEOMAGNETIC FIELD
IONIZING RADIATIONS
LATITUDE EFFECT
MAGNETIC FIELDS
MAGNETIC STORMS
RADIATION FLUX
RADIATIONS
RING CURRENTS
THRESHOLD RIGIDITY
VARIATIONS