TRANSIENT GALACTIC COSMIC-RAY MODULATION DURING SOLAR CYCLE 24: A COMPARATIVE STUDY OF TWO PROMINENT FORBUSH DECREASE EVENTS

2016 ◽  
Vol 827 (1) ◽  
pp. 13 ◽  
Author(s):  
L.-L. Zhao ◽  
H. Zhang
Keyword(s):  
Solar Cycle ◽  
Comparative Study ◽  
Forbush Decrease ◽  
Cosmic Ray ◽  
Cosmic Ray Modulation ◽  
Solar Cycle 24 ◽  
Cycle 24 ◽  
Galactic Cosmic Ray

scholarly journals Recurrent Galactic Cosmic-Ray Flux Modulation in L1 and Geomagnetic Activity during the Declining Phase of the Solar Cycle 24

2020 ◽  
Vol 904 (1) ◽  
pp. 64
Author(s):  
Catia Grimani ◽  
Andrea Cesarini ◽  
Michele Fabi ◽  
Federico Sabbatini ◽  
Daniele Telloni ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Geomagnetic Activity ◽  
Cosmic Ray ◽  
Solar Cycle 24 ◽  
Flux Modulation ◽  
Cycle 24 ◽  
Galactic Cosmic Ray ◽  
Cosmic Ray Flux

scholarly journals Numerical Modeling of Galactic Cosmic-Ray Proton and Helium Observed by AMS-02 during the Solar Maximum of Solar Cycle 24

2019 ◽  
Vol 871 (2) ◽  
pp. 253 ◽  
Author(s):  
Claudio Corti ◽  
Marius S. Potgieter ◽  
Veronica Bindi ◽  
Cristina Consolandi ◽  
Christopher Light ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Solar Cycle ◽  
Solar Maximum ◽  
Cosmic Ray ◽  
Solar Cycle 24 ◽  
Cycle 24 ◽  
Galactic Cosmic Ray

scholarly journals Long-Term Cosmic Ray Variability and the CME-Index

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Helen Mavromichalaki ◽  
Evangelos Paouris
Keyword(s):  
Standard Deviation ◽  
Solar Cycle ◽  
Cosmic Ray ◽  
Heliospheric Current Sheet ◽  
Angular Width ◽  
Cosmic Ray Intensity ◽  
Cosmic Ray Modulation ◽  
Solar Cycle 23 ◽  
Solar Cycle 24 ◽  
Cycle 24

The cosmic ray modulation in relation to solar activity indices and heliospheric parameters during the period January 1996–October 2011, covering the solar cycle 23 and the ascending phase of solar cycle 24, is studied. The new perspective of this contribution is that the CME-index, obtained from only the CMEs with angular width greater than 30 degrees, gives much better results than in previous works. The proposed model for the calculation of the modulated cosmic ray intensity obtained from the combination of solar indices and heliospheric parameters gives a very satisfactory value of the standard deviation. The best reproduction of the cosmic ray intensity is obtained by taking into account solar and interplanetary indices such as sunspot number, interplanetary magnetic field, CME-index, and heliospheric current sheet tilt. The standard deviation between the observed and calculated values is about 6.63% for the solar cycle 23 and 4.13% for the ascending part of solar cycle 24.

scholarly journals Signs of geoeffective space weather events in cosmic rays during the first half of the solar cycle 24

2021 ◽  
pp. 119-124
Author(s):  
Agnieszka Gil ◽  
Renata Modzelewska ◽  
Szczepan Moskwa ◽  
Agnieszka Siluszyk ◽  
Marek Siluszyk ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Space Weather ◽  
Transmission Lines ◽  
Cosmic Ray ◽  
Neutron Monitors ◽  
Time Intervals ◽  
Forbush Decreases ◽  
Solar Cycle 24 ◽  
Cycle 24 ◽  
Galactic Cosmic Ray

Solar originating events are continually evident in galactic cosmic ray (GCR) flux registered at the ground by neutron monitors. We analyze time intervals of sporadic Forbush decreases (Fd) observed by neutron monitors (NM) during the first half of solar cycle 24. We consider NMs data, as well as, solar, heliospheric and geoma - gnetic activity parameters, around those periods, using different mathematical tools. Subsequently, an impact of space weather phenomena on energy infrastructure is well known, in the further step we consider logs from one of the Polish transmission lines operators during the time intervals of Fds. Based on the data from the Ins- titute of Meteorology and Water Management-Polish National Research Institute we exclude from the analysis the weather-related failures. We found that the increase in the superposed averaged number of failures appears around Forbush decreases.

Cosmic ray modulation and radiation dose of aircrews during the solar cycle 24/25

Space Weather ◽  
2017 ◽  
Vol 15 (4) ◽  
pp. 589-605 ◽  
Author(s):  
Shoko Miyake ◽  
Ryuho Kataoka ◽  
Tatsuhiko Sato
Keyword(s):  
Solar Cycle ◽  
Radiation Dose ◽  
Cosmic Ray ◽  
Cosmic Ray Modulation ◽  
Solar Cycle 24 ◽  
Cycle 24
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