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Published July 1993 | public
Book Section - Chapter

The Return of the Anomalous Component to 1 AU in 1992


New observations of low energy (15 to 200 MeV/nuc) cosmic rays from SAMPEX show the strong presence of anomalous cosmic ray (ACR) N, O, and Ne, well before the approaching solar minimum. When compared with ACR temporal variations over the past two solar cycles we find that the 1992 fluxes are ~5 to 10 times their level at corresponding neutron monitor counting rates in 1969-1970 and 1985.

Additional Information

© 1993 University of Calgary. We are grateful to J. Labonte and J. Lockwood for providing unpublished Mt. Washington neutron monitor data and to J. T. Hoeksema for providing unpublished neutral sheet tilt data. This work was supported by NASA under contract NAS5-30704 and grant NAGW-1919.

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August 20, 2023
October 25, 2023