Results 211 to 220 of about 679 (255)

Magnetic and magnetotelluric data integration to determine the origin of Siwa Oasis Lakes, Western Desert, Egypt. [PDF]

Sci Rep
Aldeep M, Soliman M, Mesbah HSA, Gaweish WR, Ali AM, Meqbel N, Zaher MA.   +6 more
europepmc   +1 more source

Three-and-a-half million years of Tibetan Plateau vegetation dynamics in response to climate change. [PDF]

Nat Ecol Evol
Zhao Y, Qin F, Cui Q, Li Q, Cui Y, Birks HJB, Liang C, Zhao W, Li H, Ren W, Deng C, Ge J, Kong Y, Liu Y, Zhang Z, Zhang J, Cai M, Wei H, Qiu H, Xu H, Yang H, Chen C, Piao S, Guo Z.   +23 more
europepmc   +1 more source

Deep crustal magnetotelluric imaging of continental accretion and intracontinental deformation in central Australia. [PDF]

Sci Rep
Heinson G, Kay B, Baker D, Margiono R.
europepmc   +1 more source

Magnetic mineralogy of the Baringo core (HSPDP-BTB13-1A, Kenya) shows astronomical forcing with implications for retrieving meaningful paleointensity. [PDF]

Open Res Eur
Sier MJ, Spiering BR, Dekkers MJ, Hilgen FJ.   +3 more
europepmc   +1 more source

Magnetostratigraphic resolution of the late Ediacaran paleomagnetic enigma

Pierce J, Evans D, Polomski D, Youbi N, Mediany M, Ounar J, Oukhro R, Boumehdi MA, Strauss J, Keller CB, Gärtner A, Ovtcharova M, Wotzlaw J, Linnemann U.   +13 more
europepmc   +1 more source

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Geomagnetic Core Field Secular Variation Models

Space Science Reviews, 2009
We analyse models describing time changes of the Earth’s core magnetic field (secular variation) covering the historical period (several centuries) and the more recent satellite era (previous decade), and we illustrate how both the information contained in the data and the a priori information (regularisation) affect the result of the ill-posed ...
Nicolas Gillet, Nils Olsen, Vincent Lesur   +2 more
exaly   +5 more sources

A statistical model of the geomagnetic field

pure and applied geophysics, 1964
A statistical model of the geomagnetic field is derived, based on the assumption of an axial geocentric dipole field of strengthHe at the equator perturbed by randomly directed components of constant magnitudeh. The model fits the dispersions found from an analysis of the 1945 field, and the ratioh/He obtained for this field and from the palaeomagnetic
Edward Irving, Martin A. Ward
openaire   +1 more source

A model of the geomagnetic field for 1970

Journal of Geophysical Research, 1974
A mathematical description of the geomagnetic field for 1970 has been derived by using 360,000 land, sea, and airborne measurements accumulated since 1939. The model is expressed by 168 spherical harmonic coefficients gnm, hnm to m = n = 12. It was used as the basis for the 1970 edition of the U.S. World Charts of Magnetic Variation.
Louis Hurwitz, Eugene B. Fabiano, Norman W. Peddie   +2 more
openaire   +1 more source

A model of the geomagnetic field for 1975

Journal of Geophysical Research, 1976
A new model of the near-surface geomagnetic main field and its secular variation has been derived. The main field part, a degree 12 spherical harmonic series of 168 internal source terms, was derived from 1248 representative values having a nearly even distribution over the earth.
Norman W. Peddie, Eugene B. Fabiano
openaire   +1 more source

Positioning of the Ionospheric Field-Aligned Irregularities With Geomagnetic Field Model

IEEE Geoscience and Remote Sensing Letters, 2020
An observation model is introduced for accurate positioning of the ionospheric field-aligned irregularities (FAIs). The model is applied to the Hainan coherent scatter phased array radar (HCOPAR) in the Hainan island of China and constructed based on the International Geomagnetic Reference Field (IGRF) model.
Gang Chen 0026, Shan Yi, Zhihua Wang, Chunxiao Yan, Ting Yong, Han Jin, Wanlin Gong, Min Zhang   +7 more
openaire   +1 more source