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Statistical study on interplanetary drivers behind intense geomagnetic storms and substorms

Earth and Planetary Physics 2019年第5期3卷 380-390页

作者： Tian Tian Zheng Chang LingFeng Sun JunShui Bai XiaoMing Sha Ze Gao Mailbox 5111 Beijing 100094China National Space Science center Chinese Academy of SciencesBeijing 100190China

Geomagnetic storms and substorms play a central role in both the daily life of mankind and in academic space *** profiles of storms,especially their initial phase morphology and the intensity of their substorms under different interplanetary conditions,have usually been ignored in previous *** this study,97 intense geomagnetic storms(Dstmin≤–100 nT)between 1998 and 2018 were studied statistically using the double superposed epoch analysis(DSEA)and normalized superposed epoch analysis(NSEA)*** storms are categorized into two types according to different interplanetary magnetic field(IMF)Bz orientations:geomagnetic storms whose IMF is northward,both upstream and downstream relative to the interplanetary shock,and geomagnetic storms whose upstream and downstream IMF is consistently *** further divide these two types into two subsets,by different geomagnetic storm profiles:Type Ⅰ/Type Ⅱ—one/two-step geomagnetic storms with northward IMF both upstream and downstream of the interplanetary shock;Type Ⅲ/TypeⅣ—one/two-step geomagnetic storms with southward IMF both upstream and downstream of the interplanetary *** results show that:(1)geomagnetic storms with northward IMF both upstream and downstream of the interplanetary shock have a clear initial phase;geomagnetic storms with southward IMF in both upstream and downstream of the interplanetary shock do not;(2)the IMF is an important controlling factor in affecting the intensity characteristics of *** Bz is positive before and after the interplanetary shock arrival,the Auroral Electrojet(AE)index changes gently during the initial phase of geomagnetic storms,the median value of AE index is maintained at 500–1000 nT;(3)when Bz is negative before and after the interplanetary shock arrival,the AE index rises rapidly and reaches its maxmum value about one hour after storm sudden commencements(SSC),although the time is scaled between reference points and the maximum value of AE is

关键词： geomagnetic storms substorms normalized superposed epoch analysis initial phase IMF Bz

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Speleogenesis and Evidences Tectonic into Lakhssas Karst System (Western Anti-Atlas, Morocco)

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Open Journal of Geology 2014年第7期4卷 314-323页

作者： Abderrahmane Wanaim Mhamed Alaeddine Belfoul Sophia Bouzid Farid Faik GESCAT Laboratory Faculty of Science Ibn Zohr University Agadir Morocco

This study aims to highlight evidences of tectonic and geodynamic features within Lakhssas high plateau karst area (Moroccan Western Anti-Atlas), using an original approach based on geospeleothems analysis.?This work is organized by the speleogenesis process, controlled by tectonics and interference of karst intrinsic parameters.?Regarding the first issue, a multi-layered study compiling inventoried speleological spaces with tectonic field data analysis then with lithological, hydrogeological and geomorphological features, has demonstrated that speleogenesis processes are deeply controlled by tectonic framework so described as “speleotects”. Subsequent studies in terms of sedimentology, geomorphology, hydrogeology and dating deposits, are planned to ground those conclusions.

关键词： Geospeleothems superposed Tectonic Lakhssas Karst Anti-Atlas Uplift

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Theory of Deuteron and MCPE

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Journal of Modern Physics 2013年第9期4卷 1180-1184页

作者： Chintalapati vavb Chandraraju Department of Physics Osmania University Hyderabad India

All the experimental values of the Deuteron nucleus except the magnetic moment are theoretically derived using the ordinary methods of quantum mechanics along with the morphed gravitational potential energy. To convince that the potential energy function used is indeed the right one, it is applied to determine the energy spectrums of the nuclei: 1) Triton, 2) helium-3, 3) lithium-7, 4) Beryllium-9, and 5) Beryllium-8. The Morphed Coulomb Potential Energy (MCPE) is also obtained. With the help of MCPE and the gravitational potential energy of the electron, the charge quantum number is obtained. For galaxies, the two dominant forces that are responsible for the expansion, contraction or stationary state of the universe are obtained.

关键词： Morphed Potential Energy Bindingenergy Radius Quadrupole Moment superposed State Morphed Coulomb Potential Energy

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