Results 1 to 10 of about 394 (154)

Analysis of ionospheric plasma perturbations before Wenchuan earthquake [PDF]

Natural Hazards and Earth System Sciences, 2009
Based on data recorded by the French DEMETER satellite, plasma perturbations have been analyzed before the Wenchuan 8.0 earthquake which occurred on 12 May 2008. Using the revisited orbits, the seasonal variations of the O⁺ density
X. Zhang, X. Shen, J. Liu, X. Ouyang, J. Qian, S. Zhao   +5 more
doaj   +6 more sources

The Ionospheric Plasma Perturbations before a Sequence of Strong Earthquakes in Southeast Asia and Northern Oceania in 2018

Remote Sensing, 2023
From August to October 2018, a series of strong earthquake (EQ) events occurred in southeast Asia and northern Oceania (22°S to 0°N, 115°E to 170°E) within 50 days.
Dapeng Liu, Zhima Zeren, He Huang, Dehe Yang, Rui Yan, Qiao Wang, Xuhui Shen, Chao Liu, Yibing Guan   +8 more
doaj   +5 more sources

The variable source of the plasma sheet during a geomagnetic storm [PDF]

Nature Communications, 2023
Both solar wind and ionospheric sources contribute to the magnetotail plasma sheet, but how their contribution changes during a geomagnetic storm is an open question.
L. M. Kistler, K. Asamura, S. Kasahara, Y. Miyoshi, C. G. Mouikis, K. Keika, S. M. Petrinec, M. L. Stevens, T. Hori, S. Yokota, I. Shinohara   +10 more
doaj   +2 more sources

Generation of equatorial plasma bubble after the 2022 Tonga volcanic eruption [PDF]

Scientific Reports, 2023
Equatorial plasma bubbles are a phenomenon of plasma density depletion with small-scale density irregularities, normally observed in the equatorial ionosphere.
Atsuki Shinbori, Takuya Sori, Yuichi Otsuka, Michi Nishioka, Septi Perwitasari, Takuo Tsuda, Atsushi Kumamoto, Fuminori Tsuchiya, Shoya Matsuda, Yoshiya Kasahara, Ayako Matsuoka, Satoko Nakamura, Yoshizumi Miyoshi, Iku Shinohara   +13 more
doaj   +2 more sources

Unseasonal super ionospheric plasma bubble and scintillations seeded by the 2022 Tonga Volcano Eruption related perturbations

Journal of Space Weather and Space Climate, 2022
The Hunga–Tonga volcano eruption at 04:14:45 UT on 15 January 2022 produced various waves propagating globally, disturbing the background atmosphere and ionosphere. Coinciding with the arrival of perturbation waves, several equatorial plasma bubbles (EPBs) were consecutively generated at post-sunset hours over the East/Southeast Asian region, with the ...
Lianhuan Hu, G Li, Wenjie Sun
exaly   +4 more sources

The impact of gravity waves rising from convection in the lower atmosphere on the generation and nonlinear evolution of equatorial bubble [PDF]

Annales Geophysicae, 2009
The nonlinear evolution of equatorial F-region plasma bubbles under varying ambient ionospheric conditions and gravity wave seeding perturbations in the bottomside F-layer is studied.
E. Alam Kherani, M. A. Abdu, E. R. de Paula, D. C. Fritts, J. H. A. Sobral, F. C. de Meneses Jr.   +5 more
doaj   +1 more source

Plasma perturbations HF‐induced in the topside ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2016
AbstractThree plasma perturbations induced by SURA HF (high‐frequency) heating have been selected and analyzed in detail with the DEMETER satellite observing data by instruments of Langmuir probe and ion analyzer. Some common features are revealed, such as (1) electron density and electron temperature both increased during the heating period; (2) both ...
Zhang X., Frolov V., Zhou C., Zhao S., Ruzhin Y., Shen X., Zhima Z., Liu J.   +7 more
openaire   +3 more sources

Ionospheric TEC and plasma anomalies possibly associated with the 14 July 2019 Mw7.2 Indonesia Laiwui earthquake, from analysis of GPS and CSES data

Earth and Planetary Physics, 2022
This study presents signatures of seismo-ionospheric perturbations possibly related to the 14 July 2019 \begin{document}$ {M}_{w} $\end{document}7.2 Laiwui earthquake, detected by a cross-validation analysis of total electron content (TEC) data of the ...
YuanZheng Wen, Dan Tao, GuangXue Wang, JiaYi Zong, JinBin Cao, Roberto Battiston, ZhiMa ZeRen, XuHui Shen   +7 more
doaj   +1 more source

Disturbance in the Daytime Midlatitude Upper F Region Associated with a Medium Scale Electrodynamic Vortex Motion of Plasma [PDF]

Journal of Astronomy and Space Sciences, 2016
Under the assumption of the presence of a medium-scale E × B drift vortex of plasma in the daytime midlatitude F region, and using a simplified ionospheric model, we demonstrate that the E × B drift produces noticeable perturbations in the horizontal ...
Valery V. Hegai, Vitaly P. Kim
doaj   +1 more source

SafeNet: SwArm for Earthquake Perturbations Identification Using Deep Learning Networks

Remote Sensing, 2021
Low Earth orbit satellites collect and study information on changes in the ionosphere, which contributes to the identification of earthquake precursors.
Pan Xiong, Dedalo Marchetti, Angelo De Santis, Xuemin Zhang, Xuhui Shen   +4 more
doaj   +1 more source