Results 41 to 50 of about 1,315 (164)

Model 2D of Subsurface Structures in the Dempo Magnetic Area of Pagar Alam City Using Geomagnetic Method

Jurnal Kumparan Fisika, 2023
ABSTRAK   Metode geomagnetik digunakan dalam penelitian ini untuk membuat model 2D struktur bawah permukaan di kawasan Dempo Magnet kota Pagar Alam berdasarkan sebaran anomali. Terdapat 48 titik pengukuran pada lokasi penelitian.
Febri Adrianto Adrianto, Refrizon, Arif Ismul Hadi   +2 more
doaj   +1 more source

Unusual Enhancement of Midlatitude Sporadic-E Layers in Response to a Minor Geomagnetic Storm

Atmosphere, 2022
This study investigates the variations of middle and low latitude sporadic-E (Es) layers in response to a geomagnetic storm. Es layers are observed by five ionosondes located in the Eastern Asian sector.
Qiong Tang, Haiyang Sun, Zhitao Du, Jiaqi Zhao, Yi Liu, Zhengyu Zhao, Xueshang Feng   +6 more
doaj   +1 more source

The Swarm Initial Field Model for the 2014 geomagnetic field [PDF]

Geophysical Research Letters, 2015
AbstractData from the first year of ESA's Swarm constellation mission are used to derive the Swarm Initial Field Model (SIFM), a new model of the Earth's magnetic field and its time variation. In addition to the conventional magnetic field observations provided by each of the three Swarm satellites, explicit advantage is taken of the constellation ...
Olsen, Nils, Hulot, Gauthier, Lesur, Vincent, Finlay, Christopher, Beggan, Ciaran, Chulliat, Arnaud, Sabaka, Terence, Floberghagen, Rune, Friis-Christensen, Eigil, Haagmans, Roger, Kotsiaros, Stavros, Lühr, Hermann, Tøffner-Clausen, Lars, Vigneron, Pierre   +13 more
openaire   +5 more sources

Study of the geomagnetic field’s regional gradients in Chinese continent using three-dimensional surface Spline model

Earth and Planetary Physics, 2023
We combined domestic ground-based and satellite magnetic measurements to create a regional three-dimensional surface Spline (3DSS) gradient model of the main geomagnetic field over the Chinese continent.
Yan Feng, YiJun Li, JinYan Zhang, Shuang Liu, Abbas Nasir, Ya Huang   +5 more
doaj   +1 more source

Review of geomagnetically induced currents

地球与行星物理论评, 2022
Geomagnetic disturbances caused by solar activities induce geoelectric fields on the earth's surface, which generate geomagnetically induced currents (GICs) in electrically conducting systems.
Wanye Bu, Huiqian Zhang, Qinghua Huang
doaj   +1 more source

Stochastic forecasting of the geomagnetic field from the COV-OBS.x1 geomagnetic field model, and candidate models for IGRF-12 [PDF]

Earth, Planets and Space, 2015
We present the geomagnetic field model COV-OBS.x1, covering 1840 to 2020, from which have been derived candidate models for the IGRF-12. Towards the most recent epochs, it is primarily constrained by first differences of observatory annual means and measurements from the Oersted, Champ, and Swarm satellite missions.
Gillet, Nicolas, Barrois, Olivier, Finlay, Chris   +2 more
openaire   +2 more sources

Improved high-precision regional marine geomagnetic anomaly field model using Legendre polynomial expansion

AIP Advances
Regional geomagnetic field models can provide detailed insights into the geomagnetic field and are of substantial value for precise maritime navigation and the detection of marine targets. In light of the polynomial model’s numerous advantages, including
Bo Zhu, Houpu Li, Libo Zhu, Cheng Chen, Shuguang Wu   +4 more
doaj   +1 more source

A Variational Approach for Modeling the Inductive Response of Earth's Mantle to Time‐Varying External Geomagnetic Source

Earth and Space Science
A mathematical and numerical framework is developed for modeling Earth's magnetic field and optimizing the trajectory of the whole system using geomagnetic observations.
Kuan Li
doaj   +1 more source

Correlation between lithospheric magnetic anomalies and tectonic structures in the Norwegian-Greenland region of the Arctic

Геодинамика и тектонофизика, 2018
The studies of the deep structure and tectonics of the Arctic are important for solving the fundamental problems of modern geodynamics and developing its natural resources.
D. Yu. Abramova, L. M. Abramova, S. V. Filippov   +2 more
doaj   +1 more source

Ionospheric F-region currents estimated from Macau Science Satellite-1 and Swarm satellite magnetic data

Earth and Planetary Physics
Accurate modeling of Earth’s ionospheric F-region currents is essential for refining geomagnetic field models and understanding magnetosphere-ionosphere coupling.
JuYuan Xu, HongBo Yao, Keke Zhang
doaj   +1 more source