ABSTRACT
We have studied the variability of Cosmic rays flux during solar quiet days at mid and high
latitudes. By using the five (5) quietest days for each month, the monthly mean diurnal variation
of cosmic ray anisotropy have been derived for the period 1981-2007, which covers part of
cycles 21, 22 and 23. These quiet days are days during which the sun is relatively magnetically
quiet, leading to less anisotropic behavior in the diurnal flux of cosmic rays measured on the
earth’s surface. Four stations (Rome, Oulu, Inuvik and Thule) were used in this study to
understand the important features of the high latitude and mid-latitude diurnal wave, and how
solar and geomagnetic activity may be influencing the wave characteristics. Cosmic ray wave
characteristics were obtained by discrete Fourier transform (DFT). The mean, diurnal amplitude,
phase and dispersion for each month's diurnal wave were calculated and profiled. There was
clear indication that the terrestrial effect on the variability of the monthly mean was more
associated with geomagnetic activity rather than rigidity of the cosmic rays. Correlation of the
time series of these wave characteristics with solar and geomagnetic activity index showed better
association with solar activity.
UGOCHUKWU, O (2021). Cosmic Rays Variability In The Mid And High Latitudes During Solar Quiet Days. Afribary. Retrieved from https://track.afribary.com/works/cosmic-rays-variability-in-the-mid-and-high-latitudes-during-solar-quiet-days
UGOCHUKWU, OKIYI "Cosmic Rays Variability In The Mid And High Latitudes During Solar Quiet Days" Afribary. Afribary, 13 May. 2021, https://track.afribary.com/works/cosmic-rays-variability-in-the-mid-and-high-latitudes-during-solar-quiet-days. Accessed 25 Dec. 2024.
UGOCHUKWU, OKIYI . "Cosmic Rays Variability In The Mid And High Latitudes During Solar Quiet Days". Afribary, Afribary, 13 May. 2021. Web. 25 Dec. 2024. < https://track.afribary.com/works/cosmic-rays-variability-in-the-mid-and-high-latitudes-during-solar-quiet-days >.
UGOCHUKWU, OKIYI . "Cosmic Rays Variability In The Mid And High Latitudes During Solar Quiet Days" Afribary (2021). Accessed December 25, 2024. https://track.afribary.com/works/cosmic-rays-variability-in-the-mid-and-high-latitudes-during-solar-quiet-days