Results 31 to 40 of about 40,340 (249)
Geomagnetic field models incorporating frozen-flux constraints [PDF]
Geophysical Journal International, 1993 An algorithm is developed for constructing plausible field models satisfying the frozen-flux hypothesis of Roberts and Scott (1965), which supposes that, for short time intervals, diffusion can be neglected. The algorithm is based on a new parameterization of the field in terms of its radial component B(r) at the core-mantle boundary (CMB).
Catherine G. Constable +2 more
openaire +1 more source
Modeling of the Sq geomagnetic field induced by tidal oscillations of the atmosphere
Earth and Planetary PhysicsThe Sq (solar quiet) geomagnetic field is generated by the electric currents in the E-region of the ionosphere, driven by the atmospheric tides. It is a critical part of high-precision geomagnetic field modeling.
WenBo Li, DaLi Kong, HongBo Yao, Hao Yan
doaj +1 more source
Analytic Calculation of Geoelectric Fields Due to Geomagnetic Disturbances: A Test Case
IEEE Access, 2019 Geomagnetic field variations produce geoelectric fields that can affect the operation of technological networks at the Earth's surface, including power systems, pipelines, phone cables and railway circuits.
David H. Boteler +2 more
doaj +1 more source
An Improved Aeromagnetic Compensation Method Robust to Geomagnetic Gradient
Applied Sciences, 2022 Aeromagnetic surveys play an important role in many fields, for example, archaeology, anti-submarine warfare, and geophysical exploration. Being in the geomagnetic field, the aircraft generates a great deal of magnetic interference, resulting in bad ...
Yongqiang Feng +5 more
doaj +1 more source
Stochastic modelling of regional archaeomagnetic series [PDF]
, 2014 SUMMARY We report a new method to infer continuous time series of the declination, inclination and intensity of the magnetic field from archeomagnetic data.
Bouligand, C. +3 more
core +5 more sources
New geomagnetic measurements in the Republic of Macedonia
Annals of Geophysics, 2013 This study presents measurements of the geomagnetic field of the Republic of Macedonia, performed through a network of newly defined repeat stations. The measurements of these elements were in the intervals of 3.378° ≤ DD ≤ 3.983°, 57.276° ≤ I ≤ 59.005°,
Marjan Delipetrev +2 more
doaj +1 more source
Modelling the geomagnetic field.
Journal of geomagnetism and geoelectricity, 1990 Spherical harmonic models of the main geomagnetic field and its secular variation are used by navigators, exploration geophysicists, drillers of oil wells and by scientists studying the Earth's interior, its ionosphere and magnetosphere. The data on which such models are based must be of the highest quality and must be distributed as homogeneously as ...
openaire +2 more sources
Earth, Planets and Space, 2021 Models of the geomagnetic field rely on magnetic data of high spatial and temporal resolution to give an accurate picture of the Earth’s internal magnetic field and its time-dependence.
Clemens Kloss +2 more
doaj +1 more source
The CHAOS-8 geomagnetic field model
Earth, Planets and SpaceWe present CHAOS-8, an extension of the CHAOS field model series that describes the time-dependent near-Earth geomagnetic field, valid from 1999 to 2025. It is estimated from magnetic measurements collected by multiple low-earth-orbit satellites, such as
C. Kloss +5 more
doaj +1 more source
Modelling the effects of space weather at the Earth’s surface : a UK geoelectric field model [PDF]
, 2004 Geomagnetically Induced Currents (GIC), which can flow in technological systems such as power transmission grids, are a consequence of the geoelectric field induced at the surface of the Earth during geomagnetic storms.
Clarke, Ellen +3 more
core