Results 11 to 20 of about 3,540 (183)
Earth, Planets and SpaceThe structure and thermal state of the Moon’s deep interior remain incompletely understood. Here, we apply geomagnetic depth sounding (GDS) to Apollo 12, 15, and 16 surface magnetometer data—yielding the first comparative, multi-site resistivity models ...
Ping-Yu Chang +8 more
doaj +2 more sources
Geophysical Journal International, 2023 SUMMARY Geomagnetic depth sounding (GDS) is a geophysical electromagnetic (EM) method that studies the deep structure and composition of the Earth by using long-period EM signals from geomagnetic observatories and satellites. In this paper, a 3-D anisotropic GDS modelling algorithm is developed.
Changchun Yin +2 more
exaly +3 more sources
Comment on ‘Geomagnetic depth sounding by induction arrow representation: A review’ by G. P. Gregori and L. J. Lanzerotti [PDF]
Reviews of Geophysics, 1982 In conclusion we may safely state that Gregori and Lanzerotti [1980] oversimplified their comparison of real induction vectors considerably and completely disregarded the four points summarized here. However, careful consideration of these differences is not merely a matter of academic interest but is also indispensable when interpreting actual field ...
exaly +4 more sources
Geomagnetic depth sounding in the Northern Apennines (Italy) [PDF]
Earth, Planets and Space, 2014 A Geomagnetic Depth Sounding (GDS) survey covering the Northern Apennines of Italy has been carried out in the period 1992–94. Induction arrows maps and hypothetical event Fourier maps were constructed to obtain an electromagnetic imaging of this area.
ARMADILLO, EGIDIO +8 more
openaire +3 more sources
On the relevance of source effects in geomagnetic pulsations for induction soundings [PDF]
Annales Geophysicae, 2018 This study is an attempt to close a gap between recent research on geomagnetic pulsations and their usage as source signals in electromagnetic induction soundings (i.e., magnetotellurics, geomagnetic depth sounding, and magnetovariational sounding ...
A. Neska +3 more
doaj +1 more source
Electrical Conductivity Evidence for the Existence of a Mantle Plume Beneath Tarim Basin
Applied Sciences, 2021 This paper proposes using a simulated annealing (SA) calculation to perform one-dimensional inversion of Geomagnetic Depth Sounding (GDS) to obtain the conductivity information of the lower mantle beneath the Tarim area, to calculate the temperature of ...
Junhao Guo, Xinbao Lian, Xueqiu Wang
doaj +1 more source
Range finding of Alfvén oscillations and direction finding of ion-cyclotron waves by using the ground-based ULF finder [PDF]
, 1997 International audienceA new approach to the problem of direction and distance finding of magnetospheric ULF oscillations is described. It is based on additional information about the structure of geoelectromagnetic field at the Earth's surface which is ...
Guglielmi, A. +4 more
core +8 more sources
Cold and Wet Mantle Transition Zone Beneath the Mediterranean Sea Revealed by the Electrical Image
Applied Sciences, 2023 A three-dimensional electrical conductivity model of the mantle beneath North Africa and Southern Europe is obtained by geomagnetic depth sounding. C-responses are estimated from geomagnetic data observed at observatories in and around the region and ...
Shiwen Li, Yunhe Liu
doaj +1 more source
Influence of geomagnetic storms on the quality of magnetotelluric impedance
Earth, Planets and Space, 2022 Magnetotelluric (MT) field data contain natural electromagnetic signals and artificial noise sources (instrumental, anthropogenic, etc.). Not all available time-series data contain usable information on the electrical conductivity distribution at depth ...
Hao Chen +2 more
doaj +1 more source
Imaging Low-Energy Ion Outflow in the Auroral Zone
Frontiers in Astronomy and Space Sciences, 2022 The VISualizing Ion Outflow via Neutral atom imaging during a Substorm (VISIONS) sounding rocket mission investigated the factors leading to ion outflow following a geomagnetic substorm.
Douglas Rowland +7 more
doaj +1 more source