Chali Idosa Uga, Sujan Prasad Gautam, Ephrem Beshir Seba
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引用次数: 0
Abstract
This work investigates the relationship between cosmic ray intensity (CRI) and key interplanetary and geomagnetic parameters during both disturbed (November 1–6, 2021) and quiet (November 7–12, 2021) periods. Four neutron monitor stations, namely BKSN, DOMC, JUNG, and MXCO, are employed to analyze the behavior of CRI in response to variations in southward interplanetary magnetic field (IMF Bz), interplanetary electric field (IEF Ey), solar wind speed (Vsw), and geomagnetic indices, including Kp and Dst. During the storm period, time series plots reveal significant Forbush Decreases (FD) in CRI at all stations. These FDs exhibit distinct characteristics, with the most substantial reduction observed at high-latitude stations and the least at low-latitude stations. Notably, the Mexico station, situated in the low-latitude region, records higher neutron counts for both disturbed and quiet periods compared to the middle (BKSN and JUNG) and high-latitude (DOMC) stations. Cross-correlation analysis is employed to examine the relationships between CRI and the aforementioned parameters. Results indicate that during the geomagnetically disturbed period, CRI exhibits negative correlations with IMF Bz, Vsw, and Kp index, while demonstrating positive correlations with Dst and IEF Ey. The strongest correlation is observed between CRI and Dst, suggesting that it can affect variations in cosmic rays measured on Earth, during the geomagnetic storms. In contrast, during the quiet period, significantly weaker correlation was observed than the disturbed period. However, at the JUNG station, CRI displays good correlations with all considered parameters even during the quiet period. The station-specific correlations signifies the importance of geographic location in shaping the response of CRI to external influences.
期刊介绍：
Cosmic Research publishes scientific papers covering all subjects of space science and technology, including the following: ballistics, flight dynamics of the Earth’s artificial satellites and automatic interplanetary stations; problems of transatmospheric descent; design and structure of spacecraft and scientific research instrumentation; life support systems and radiation safety of manned spacecrafts; exploration of the Earth from Space; exploration of near space; exploration of the Sun, planets, secondary planets, and interplanetary medium; exploration of stars, nebulae, interstellar medium, galaxies, and quasars from spacecraft; and various astrophysical problems related to space exploration. A chronicle of scientific events and other notices concerning the main topics of the journal are also presented.
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