Results 21 to 30 of about 3,266 (155)

Can core-surface flow models be used to improve the forecast of the Earth's main magnetic field? [PDF]

, 2008
[1] Geomagnetic main field models used for navigation are updated every 5 years and contain a forecast of the geomagnetic secular variation for the upcoming epoch. Forecasting secular variation is a difficult task.
Alexandrescu, Alexandrescu, Alexandrescu, Backus, Backus, Bloxham, Bloxham, Bloxham, Braginsky, Courtillot, Eymin, Fournier, Gauthier Hulot, Gubbins, Holme, Holme, Hulot, Hulot, Hulot, Hulot, Jackson, Jackson, Jault, Jault, Langel, Le Huy, LeMouël, Liu, Luis Silva, Maus, Maus, Maus, Menke, Mound, Olsen, Olsen, Pais, Rau, Roberts, Sabaka, Stefan Maus, Voorhies, Voorhies, Voorhies, Waddington, Whaler, Zatman   +46 more
core   +5 more sources

Development of a Systematic Model for Study on the Phenomena of Ionospheric and Geomagnetic Variations [PDF]

Journal of Astronomy and Space Sciences, 1999
Solar activities ejecting high energy particles influence satellites and satellite communications as well as perturb geomagnetic fields. To understand space environments near the Earth being influenced by the Sun, we must study about the magnetosphere ...
Yoo Surn Pyo, Hwang-Jae Rhee, Min-Geun Kim, Eunhwa Kim, Sung-Hee Song, Jinny Lee, Dong-Hun Lee   +6 more
doaj  

The Phase Space Density Evolution of Radiation Belt Electrons under the Action of Solar Wind Dynamic Pressure

Magnetochemistry, 2023
Earth’s radiation belt and ring current are donut-shaped regions of energetic and relativistic particles, trapped by the geomagnetic field. The strengthened solar wind dynamic pressure (Pdyn) can alter the structure of the geomagnetic field, which can ...
Peng Hu, Haimeng Li, Zhihai Ouyang, Rongxin Tang, Liangjin Song, An Yuan, Bopu Feng, Yangyang Wang, Wenqian Zou   +8 more
doaj   +1 more source

The BGS candidate models for IGRF-13 with a retrospective analysis of IGRF-12 secular variation forecasts

Earth, Planets and Space, 2021
The three candidate models submitted by the British Geological Survey for the 13th generation International Geomagnetic Reference Field are described.
William J. Brown, Ciarán D. Beggan, Grace A. Cox, Susan Macmillan   +3 more
doaj   +1 more source

Cosmic ray cutoff prediction using magnetic field from global magnetosphere MHD simulations [PDF]

Annales Geophysicae, 2005
Relativistic particles entering the Earth's magnetosphere, i.e. cosmic rays and solar energetic particles, are of prime space weather interest because they can affect satellite operations, communications, and the safety of astronauts and airline ...
J. M. Weygand, J. Raeder
doaj   +1 more source

Secular variations of geomagnetic declination in the Karadag point and the global helio-geodynamic processes

Геофизический журнал, 2019
To study the changes in the local variations of geomagnetic field, the Karadag point was chosen due to the fact that we found previously on increased insolation and the surface temperature of the earth at this point over the last century (compared to ...
A. E. Volvach, G. S. Kurbasova
doaj   +1 more source

A candidate secular variation model for IGRF-13 based on MHD dynamo simulation and 4DEnVar data assimilation

Earth, Planets and Space, 2020
We have submitted a secular variation (SV) candidate model for the thirteenth generation of International Geomagnetic Reference Field model (IGRF-13) using a data assimilation scheme and a magnetohydrodynamic (MHD) dynamo simulation code.
Takuto Minami, Shin’ya Nakano, Vincent Lesur, Futoshi Takahashi, Masaki Matsushima, Hisayoshi Shimizu, Ryosuke Nakashima, Hinami Taniguchi, Hiroaki Toh   +8 more
doaj   +1 more source

Testing Geomagnetic Reference Field models for 1990-2000 with data from the Trelew Geomagnetic Observatory, Argentina [PDF]

Geofísica Internacional, 2003
Every five years a new International Geomagnetic Reference Field (IGRF) model is released and the secular variation for the previous period is updated, producing the definitive DGRF model.
Marta E. Ghidella, Jacqueline Köhn, Julio C. Gianibelli   +2 more
doaj  

The Mag.num core field model as a parent for IGRF-13, and the recent evolution of the South Atlantic Anomaly

Earth, Planets and Space, 2021
We present the GFZ candidate field models for the $$13{\mathrm{th}}$$ 13 th  Generation International Geomagnetic Reference Field (IGRF-13). These candidates were derived from the Mag.num.IGRF13 geomagnetic core field model, which is constrained by Swarm
M. Rother, M. Korte, A. Morschhauser, F. Vervelidou, J. Matzka, C. Stolle   +5 more
doaj   +1 more source

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