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Academic Articles & Research Papers
Showing 20 of 9,867 academic articles
Yong Ren, Minghui Zhu, Lei Dai, Walter Gonzalez et al. • Geophysical Research Letters
(2026)
Abstract Substorms are often described by a loading‐unloading cycle, where onset follows gradual accumulation of solar wind magnetic flux in the magnetosphere. Yet observations indicate that intense substorms can also be directly driven, th...
DOAJ
Open Access (DOAJ)
DOI: 10.1029/2025GL119629
Dastanboo Nima, Li Xiao-Qing, Gharibdoost Hamed • Open Geosciences
(2020)
In deep tunnels with hydro-geological conditions, it is paramount to investigate the geological structure of the region before excavating a tunnel; otherwise, unanticipated accidents may cause serious damage and delay the project. The purpo...
DOAJ
Open Access (DOAJ)
DOI: 10.1515/geo-2020-0193
Samarth Urs M, Nagendra P, B.V. Suresh Kumar • Results in Earth Sciences
(2025)
We present mapping and comparision of the geology of the southern block of the Chitradurga schist belt (CSB). We have used ASTER images and geophysical data to compare the geology. Consequently, present study confirms how remote sensing int...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.rines.2025.100117
J. Błęcki, J. Błęcki, M. Parrot, R. Wronowski • Annales Geophysicae
(2009)
We report the observation of ELF and VLF signature of sprites recorded on
the low altitude satellite DEMETER during thunderstorm activity. At an
altitude of ~700 km, waves observed on the E-field spectrograms at
mid-to-low latitudes duri...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/angeo-27-2599-2009
Peilin Wang, Bingxin Liu, Ying Li, Peng Chen et al. • IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
(2024)
As shipping routes and resource exploration move toward high-latitude oceans, sea ice becomes a major threat to the safety of ship navigation, posing significant challenges to the shipping industry and offshore resource development. Continu...
DOAJ
Open Access (DOAJ)
DOI: 10.1109/JSTARS.2023.3335294
N.F. Hernández Reyes, R. Fernández • Geofísica Internacional
(1991)
El filtrado de velocidad de secciones sísmicas tiene como objeto eliminar la presencia de ruidos que enmascaran los arribos asociados a horizontes reflectores de interés. Se plantea una técnica de filtrado de velocidad que consiste en aplic...
DOAJ
Open Access (DOAJ)
DOI: 10.22201/igeof.00167169p.1991.30.2.1132
J. Schwarz, J. Schwarz, G. Kirchengast, G. Kirchengast et al. • Atmospheric Measurement Techniques
(2018)
Global Navigation Satellite System (GNSS) radio occultation
(RO) observations are highly accurate, long-term stable data sets and are
globally available as a continuous record from 2001. Essential climate
variables for the thermodynamic ...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/amt-11-2601-2018
K. Revathy, S. R. Prabhakaran Nayar, B. V. Krishna Murthy • Annales Geophysicae
(2001)
The vertical velocity in
the troposphere-lower stratosphere region measured using MST radar has been
utilized to evaluate the temperature profile in the region. The diurnal
variation of the tropospheric temperature on one day in Augus...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/angeo-19-1001-2001
I. P. Escobar, N. C. de Sá, J. J. Dantas, F. J. S. S. Dias • Brazilian Journal of Geophysics
(1996)
A Linha de Calibração Gravimétrica Observatório Nacional - Agulhas Negras foi implantada com o objetivo de monitorar as características dos gravímetros utilizados nos levantamentos da Rede Gravimétrica Fundamental Brasileira. Trata-se de um...
DOAJ
Open Access (DOAJ)
DOI: 10.22564/rbgf.v14i1.1210
Yuanning Li, Chao Xu, Fei Geng, Chunyao Bu et al. • Dizhen xuebao
(2024)
为揭示诱发地震和天然地震对建筑结构影响及其破坏概率分布的影响，本文以我国典型砌体结构为研究对象，开展了考虑诱发地震影响的易损性研究。首先建立了典型三层和六层砌体结构分析模型，然后以40条震级和震中距都接近的天然地震地震动和诱发地震地震动为输入开展Pushover分析，分别建立基于峰值加速度PGA和结构基本周期加速度反应谱值Sa的易损性曲线，最后采用循环往复加载方法对两次诱发地震作用下的结构倒塌易损性进行了分析讨论。结果表明：当以PGA作为易损性输入地震动参数时，天然地震地震动...
DOAJ
Open Access (DOAJ)
DOI: 10.11939/jass.20230060
A. U. Adebanjo, B. I. O. Dahunsi, J. O. Labiran • Nigerian Journal of Technological Development
(2021)
In this study, locally produced Metakaolin (MK) was used as an admixture in recycled aggregate concrete of grades M 25 and M 30. The content of MK varied from 0-15% at 5% intervals. The physical and mechanical properties (bulk density, spec...
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Open Access (DOAJ)
Baizan Tang, Wenchao Deng, Su Chen, Xiaojun Li et al. • Earthquake Research Advances
(2022)
Based on the the large shaking table test results on irregular section subway station structure in soft soil, an overall time-history numerical simulation is conducted to study the nonlinear dynamic interaction of the soil-irregular undergr...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.eqrea.2022.100168
D. M. Wright, R. S. Dhillon, T. K. Yeoman, T. R. Robinson et al. • Annales Geophysicae
(2009)
On 10 October 2006 the SPEAR high power radar facility was operated in a
power-stepping mode where both CUTLASS radars were detecting backscatter
from the SPEAR-induced field-aligned irregularities (FAIs). The effective
radiated power of...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/angeo-27-2623-2009
R. Selvamurugan, R. Selvamurugan, R. Selvamurugan, C. V. Devasia et al. • Annales Geophysicae
(2002)
The temporal and height
statistics of the occurrence of meteor trails during the Leonid meteor shower
revealed the capability of the Indian MST radar to record large numbers of
meteor trails. The distribution of radio meteor trails du...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/angeo-20-1869-2002
Josibel G. Oliveira Jr., Walter E. Medeiros, Werner F. Tabosa, Helenice Vital • Brazilian Journal of Geophysics
(2008)
ABSTRACT
A sand dune located near São Bento do Norte and Caiçara do Norte towns (northern coastal region of Rio Grande do Norte state, Northeastern Brazil) is rapidly migrating toward urban areas. To understand the depositional processes (e...
DOAJ
Open Access (DOAJ)
DOI: 10.1590/S0102-261X2008000100001
Jue Ning, Xu Chen, Tao Wang, Qing Xu et al. • Geophysical Research Letters
(2025)
Abstract The modulation of anticyclonic subsurface‐intensified mode‐water eddies (MWEs) on the oceanic physical and biological responses to tropical cyclones (TCs) is investigated using satellite measurements, in situ observations and numer...
DOAJ
Open Access (DOAJ)
DOI: 10.1029/2024GL112598
Chenyang Zhang, Gang Wan, Lei Liu, Yutong Jia • IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
(2022)
Research on lunar basalt thickness and subsurface features is of great significance to conclude the magma evolution history and explore the thermal evolution process of the Moon. The mission of Lunar Radar Sounder (LRS) made subsurface dete...
DOAJ
Open Access (DOAJ)
DOI: 10.1109/JSTARS.2022.3173790
Xiaomin Ruan, Mingchun Chen, Zhendong Liu, Zhihui Wang et al. • 地球与行星物理论评
(2023)
Seismic exploration is a key method for the study of underground structures. Active seismic surveys can acquire high signal-to-noise ratio reflection data; however, the operation of active seismic surveys is complicated, and the exploration...
DOAJ
Open Access (DOAJ)
DOI: 10.19975/j.dqyxx.2022-046
Yanbing Bai, Rui-Yang Ju, Lemeng Zhao, Junjie Hu et al. • IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
(2026)
Uncrewed Aerial Vehicles (UAVs) have become increasingly important in disaster emergency response by facilitating aerial video analysis. Due to the limited computational resources available on UAVs, large models cannot be run efficiently fo...
DOAJ
Open Access (DOAJ)
DOI: 10.1109/JSTARS.2026.3685660
Minsu Park, Sungmin Park, Jeonggyu Kim, Chanwoo Ahn et al. • Geophysical Research Letters
(2026)
Abstract Ice‐nucleating particles (INPs) play a role in mixed‐phase clouds, yet the processes controlling their properties remain poorly understood. Water‐soluble salts such as sodium chloride (NaCl) depress the freezing temperature of clou...
DOAJ
Open Access (DOAJ)
DOI: 10.1029/2026GL123395