scholarly journals Galactic Cosmic Ray Spectra During Solar Cycle 23 and 24 - Measurement Capabilities of the Electron Proton Helium Instrument

2016 ◽  
Author(s):  
Patrick Kühl ◽  
Nina Dresing ◽  
Jan Gieseler ◽  
Bernd Heber ◽  
Andreas Klassen
Keyword(s):  
Solar Cycle ◽  
Cosmic Ray ◽  
Solar Cycle 23 ◽  
Galactic Cosmic Ray ◽  
Measurement Capabilities

scholarly journals Investigation of the relation between space-weather parameters and Forbush decreases automatically selected from Moscow and Apatity cosmic ray stations during solar cycle 23

2021 ◽  
Vol 21 (11) ◽  
pp. 273
Author(s):  
Jibrin Adejoh Alhassan ◽  
Ogbonnaya Okike ◽  
Augustine Ejikeme Chukwude
Keyword(s):  
Solar Cycle ◽  
Space Weather ◽  
Cosmic Ray ◽  
Computer Code ◽  
Weather Data ◽  
Forbush Decreases ◽  
Two Samples ◽  
Solar Cycle 23 ◽  
Weather Parameters ◽  
Galactic Cosmic Ray

Abstract We present the results of an investigation of the relation between space-weather parameters and cosmic ray (CR) intensity modulation using algorithm-selected Forbush decreases (FDs) from Moscow (MOSC) and Apatity (APTY) neutron monitor (NM) stations during solar cycle 23. Our FD location program detected 408 and 383 FDs from MOSC and APTY NM stations respectively. A coincident computer code employed in this work detected 229 FDs that were observed at the same Universal Time (UT) at the two stations. Out of the 229 simultaneous FDs, we formed a subset of 139 large FDs(%) ≤ − 4 at the MOSC station. We performed a two-dimensional regression analysis between the FD magnitudes and the space-weather data on the two samples. We find that there were significant space-weather disturbances at the time of the CR flux depressions. The correlation between the space-weather parameters and decreases in galactic cosmic ray (GCR) intensity at the two NM stations is statistically significant. The implications of the present space-weather data on CR intensity depressions are highlighted.

Evaluation of the short and intermediate term periodicities in cosmic ray intensity during solar cycle 23

2010 ◽  
Vol 58 (7-8) ◽  
pp. 1045-1049 ◽  
Author(s):  
Partha Chowdhury ◽  
Manoranjan Khan ◽  
P.C. Ray
Keyword(s):  
Solar Cycle ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Solar Cycle 23

scholarly journals Galactic Cosmic Ray Modulation Up to Recent Solar Cycles

2011 ◽  
Vol 48 (4) ◽  
pp. 66-70
Author(s):  
R. Agarwal ◽  
R. Mishra
Keyword(s):  
Solar Cycle ◽  
Solar Radio ◽  
Cosmic Ray ◽  
Radio Flux ◽  
Solar Cycles ◽  
Cosmic Ray Intensity ◽  
Cosmic Ray Modulation ◽  
Solar Radio Flux ◽  
Yearly Average ◽  
Galactic Cosmic Ray

Galactic Cosmic Ray Modulation Up to Recent Solar Cycles Cosmic ray neutron monitor counts obtained by different ground-based detectors have been used to study the galactic cosmic ray modulation during the last four solar activity cycles. Since long, systematic correlative studies have been per-formed to establish a significant relationship between the cosmic ray intensity and different helio-spheric activity parameters, and the study is extended to a recent solar cycle (23). In the present work, the yearly average of 10.7 cm solar radio flux and the interplanetary magnetic field strength (IMF, B) have been used to find correlation of the yearly average cosmic ray intensity derived from different neutron monitors. It is found that for four solar cycles (20-23) the cosmic ray intensity is anti-correlated with the 10.7 cm solar radio flux and the IMF, B value with some discrepancy. However, this is in a good positive correlation with the flux of mentioned wavelength for four different solar cycles. The IMF, B shows a weak correlation with cosmic rays for solar cycle 20, and a good anti-correlation for solar cycles 21-23.

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