Original scientific paper
Recurrent tendency in cosmic ray intensity through the period 1958-1975
S. M. Abdel Wahab
; Physics Department, Faculty of Science Ain Shams University, Cairo, Egypt
A. H. Girgis
; Physics Department, Faculty of Science Ain Shams University, Cairo, Egypt
N. E. Abdel Aziz
; National Institute of Standards, Dokki, Cairo, Egypt
A. A. Mawgood
; National Institute of Standards, Dokki, Cairo, Egypt
Abstract
Investigation of cosmic ray intensity through the period 1958-1975 showed that the solar cycle dependence is highly pronounced for the transient variations, less pronounced for the 27-day recurrent tendency and almost missed for the 13.5-day variation. Decreasing and increasing phases of solar activity are characterized by significant coherence of the geomagnetic KP-index with 27-day recurrent tendency in cosmic ray intensity.
Keywords
Hrčak ID:
327685
URI
Publication date:
4.8.1980.
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