Results 81 to 90 of about 452 (183)

Geomagnetic secular variation since 1901 [PDF]

Geophysical Journal International, 1981
Summary. All available annual means, from the world-wide network of magnetic observatories, of north intensity (X), east intensity (Y) and vertical intensity (Z) from 1901 to 1977 are subjected to spherical harmonic analysis to obtain 38 models of the Earth's geomagnetic field at two-year intervals.
openaire   +1 more source

GEOMAGNETIC EXCURSIONS AND SECULAR VARIATIONS [PDF]

, 2013
Roberts, Andrew, Turner, G.M.
openaire   +2 more sources

A Novel Neural Network‐Based Approach to Derive a Local Geomagnetic Baseline for Future Robust Characterization of Geomagnetic Indices at Mid‐Latitude

Space Weather
Geomagnetic indices derived from ground magnetic measurements characterize the intensity of solar‐terrestrial interaction. Global magnetic indices derived from multiple magnetic observatories at mid‐latitude have commonly been used for space weather ...
Rungployphan Kieokaew, Veronika Haberle, Aurélie Marchaudon, Pierre‐Louis Blelly, Aude Chambodut   +4 more
doaj   +1 more source

A study of Geomagnetic Field and It's secular variation at the Location Brazilian Anomaly (25°S, 45°W).

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
ln this paper we study  and  analysis  the  total intensity  (P) .and the horizontal  component (H) of the geomagnetic field at the location na ly Brazilian    Anomaly  (Lat   25S,    long   4S·"W)    in  which   the geomagnetic field intensity  has a ...
H.A. AI-Mahdi, A.F. Mokheber
doaj  

Exploring geomagnetic variations in ancient mesopotamia: Archaeomagnetic study of inscribed bricks from the 3rd-1st millennia BCE. [PDF]

Proc Natl Acad Sci U S A, 2023
Howland MD, Tauxe L, Gordin S, Altaweel M, Cych B, Ben-Yosef E.   +5 more
europepmc   +1 more source

How do core surface flow models vary when inverted from IGRF-14 candidate field models? [PDF]

Earth Planets Space
Rogers HF, Mandea M.
europepmc   +2 more sources

Gravitational dynamos and the low-frequency geomagnetic secular variation. [PDF]

Proc Natl Acad Sci U S A, 2007
Olson P.
europepmc   +1 more source

Forecasting secular variation using physics-informed neural networks for IGRF-14. [PDF]

Earth Planets Space
Shakespeare-Rees N, Livermore PW, Davies CJ, Rogers HF, Beggan CD, Brown WJ, Finlay CC.   +6 more
europepmc   +1 more source

Gravitational torque drives multidecadal variations in length of day. [PDF]

Nature
Zhang H, Dumberry M.
europepmc   +1 more source

Waves in planetary dynamos. [PDF]

Rev Mod Plasma Phys, 2023
Hori K, Nilsson A, Tobias SM.
europepmc   +1 more source