Impacts on Cosmic-Ray Intensity Observed During Geomagnetic Disturbances

Adhikari, Binod; Sapkota, Nirakar; Baruwal, Prashrit; Chapagain, Narayan P.; Braga, Carlos Roberto

doi:10.1007/s11207-017-1183-3

Cited by 4 publications

(2 citation statements)

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“…The variation of IMF-Bz differs from SYM-H because of its less dependence on other factors like axial orientation and speed of magnetic cloud [23]. The main purpose of AE (Auroral Electrojet) index is to measure the global auroral zone magnetic activity produced by enhanced ionospheric currents, and we know that the AE is the difference of amplitude upper (AU) and amplitude lower (AL) AE = AU − AL, where AU is the eastward electrojet current densities and AL is the westward electrojet current densities [1][2][3]. The AE value of the storm was almost negligible before the storm time.…”

Section: Solar Wind Parameters Imf-bz and Geomagnetic Indices (Ae Anmentioning

confidence: 99%

“…Hence we can conclude that the FD was strongly GCR effective. For more, GCRs play very important role in the ionization of environment [2,3,9] and have several other impacts in our surrounding. Since the cosmic rays received by the Earth decreased during 18 to 22 November, we can infer that the surrounding was less impacted by the cosmic rays during that period ( Fig.…”

Section: Effect On Galactic Cosmic Rays (Gcr)mentioning

confidence: 99%

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Analysis of cosmic ray, solar wind energies, components of Earth’s magnetic field, and ionospheric total electron content during solar superstorm of November 18–22, 2003

Adhikari

Kaphle²,

Adhikari³

et al. 2019

SN Appl. Sci.

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This paper studies the impacts of interplanetary coronal mass ejections (ICMEs) preceding storm (November 18-22, 2003) on several space weather components. The comprehensive study of different parameters such as solar wind speed, density, plasma temperature, plasma pressure, auroral electrojet, SYM-H, energy transfer, components of Earth's magnetic field, total electron content, and cosmic ray received by Earth during the ICME storm has been studied, which accounts for the more precise knowledge of the storm from different dimensions. The solar storm of November 2003 had SYM-H value of − 472 nT. During the main phase of the storm, the velocity of solar wind reached approximately to 500 km/s, and plasma pressure cumulated to around 20 nPa. The total energy dissipated during the storm in the magnetosphere has been converted in the form of ring current, joule heating, and auroral precipitation. The joule heating leads to modification in thermospheric contents and traveling atmospheric contents that result in further modification of the density, composition, circulation, and dynamics of ionosphere-thermosphere system. This phenomena further result in the escalation and slumping of TEC. We found out the decrease in rate of cosmic ray received by the Earth during the main phase of the storm, which lead to our conclusion that there exists inverse relation between strength of solar storm and amount of cosmic ray fluxes received by the Earth. In addition, the study made on the change in TEC and SYM-H during the event hinted us toward the possible changes in the space weather caused by the solar superstorm of November 18-22, 2003.

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Section: Solar Wind Parameters Imf-bz and Geomagnetic Indices (Ae Anmentioning

confidence: 99%

Section: Effect On Galactic Cosmic Rays (Gcr)mentioning

confidence: 99%