Results 61 to 70 of about 6,743 (215)
Earth and Planetary Physics, 2021 Responses of atmospheric carbon dioxide (CO2) density to geomagnetic secular variation are investigated using the Whole Atmosphere Community Climate Model-eXtended (WACCM-X).
Xu Zhou +4 more
doaj +1 more source
, 2003 We report a survey carried out on basalt flows from Amsterdam Island in order to check the presence of intermediate directions interpreted to belong to a geomagnetic field excursion within the Brunhes epoch, completing this paleomagnetic record with ...
Bernard Henry +11 more
core +4 more sources
Detection of Equatorial Plasma Bubbles Using the COSMIC‐2 Rate of TEC Index
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract Equatorial plasma bubbles (EPBs) are large‐scale plasma depletion structures that can disrupt Global Navigation Satellite Systems (GNSS) and other space‐based technologies. Several instruments have been employed to study EPB dynamics, with Total Electron Content (TEC) and Rate of TEC change Index (ROTI) data standing out as valuable parameters
Ana L. Christovam +2 more
wiley +1 more source
Core-mantle boundary deformations and J2 variations resulting from the 2004 Sumatra earthquake
, 2007 The deformation at the core-mantle boundary produced by the 2004 Sumatra earthquake is investigated by means of a semi-analytic theoretical model of global coseismic and postseismic deformation, predicting a millimetric coseismic perturbation over a ...
A. Piersanti +30 more
core +1 more source
A Hierarchical Bayesian Model for the Global Holocene Geomagnetic Field
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.Abstract We present a hierarchical Bayesian model of the global geomagnetic field for the last 8,000 years. The model is built solely with thermoremanent records, which include archeomagnetic and volcanic data. Building upon previous work, this model includes fewer approximations and treats model hyperparameters as probabilistic variables.
M. A. Schanner, S. Panovska, M. Korte
wiley +1 more source
Short-term prediction of geomagnetic secular variation with an echo state network
Earth, Planets and SpaceA technique for predicting the secular variation (SV) of the geomagnetic field based on the echo state network (ESN) model is proposed. SV is controlled by the geodynamo process in the Earth’s outer core, and modeling its nonlinear behaviors can be ...
Shin’ya Nakano, Sho Sato, Hiroaki Toh
doaj +1 more source
A New View of Long-Term Geomagnetic Field Secular Variation
Frontiers in Earth Science, 2018 This study carries out a statistical analysis of high-resolution PSV records for the last ~70 ka from three different regions of the Earth. We consider directional and intensity variability in each region on time scales of 103-105 years in order to ...
Steve P. Lund
doaj +1 more source
Sequential modelling of the Earth’s core magnetic field
Earth, Planets and Space, 2020 We describe a new, original approach to the modelling of the Earth’s magnetic field. The overall objective of this study is to reliably render fast variations of the core field and its secular variation.
Guillaume Ropp +3 more
doaj +1 more source
Storm‐Time Dst Forecast: An Innovative Approach
Space Weather, Volume 24, Issue 5, May 2026.Abstract One of the most persistent challenges in the space weather field is predicting the storm‐time response of the geospace without knowing the predicted drivers in the solar wind. Here, a new pattern recognition algorithm is developed to predict storm‐time Dst index from 1 hr to ∼4.5 days into the future. Storm‐time Dst patterns (or reference Dst)
Yongliang Zhang, Larry J. Paxton
wiley +1 more source
Geomagnetic Secular Variation Over and Near the Antarctic Continent
Antarctic Record, 1961 南極大陸近辺における地球磁場の永年変化は著しくはげしいことが,IGY南極観測の結果明らかになった.特に,昭和基地近傍はその変化量がはげしく,鉛直磁力の変化量は約2×10γ/年にも達する.第4図と第5図とを比較すれば,南半球,特に南極大陸近辺の地球磁場永年変化が北半球のそれに比していかに著しいものであるか一見して明らかであろう.特に昭和基地とHeard島の間は2800kmの距離であるにかかわらず,前者ではZ=181γ/年,後者ではZ=-98γ/年である.このきわめて顕著な永年変化局部異常は第6図に示す如く,
Takesi NAGATA
doaj +1 more source