Results 21 to 30 of about 7,951 (302)

Modeling and Predicting the Short‐Term Evolution of the Geomagnetic Field [PDF]

Journal of Geophysical Research: Solid Earth, 2018
AbstractWe propose a reduced dynamical system describing the coupled evolution of fluid flow and magnetic field at the top of the Earth's core between the years 1900 and 2014. The flow evolution is modeled with a first‐order autoregressive process, while the magnetic field obeys the classical frozen flux equation.
Bärenzung, Julien, Holschneider, Matthias, Wicht, Johannes, Sanchez, Sabrina, Lesur, Vincent   +4 more
openaire   +6 more sources

Recovering external contribution from the monthly mean series of a given geomagnetic observatory

Annals of Geophysics, 2016
The differences between monthly mean values of the observed geomagnetic field and monthly values predicted by different models of the internal geomagnetic field (named “model biases”) for the time period 2000-2015 at several geomagnetic observatories are
Bejo Duka, Eni Duka, Klaudio Peqini
doaj   +1 more source

An Aeromagnetic Compensation Method for Suppressing the Magnetic Interference Generated by Electric Current with Vector Magnetometer

Sensors, 2022
In aeromagnetic detection, the magnetic interference conducted by electric currents in onboard electronic (OBE) equipment is gradually being taken seriously with the development of aeromagnetic compensation technology.
Chao Zhang, Changping Du, Xiang Peng, Qi Han, Hong Guo   +4 more
doaj   +1 more source

A Model of the Geomagnetic Field at Epoch 1975 [PDF]

Geophysical Journal International, 1975
Summary The main magnetic field at epoch 1975 is defined by 168 spherical harmonic coefficients (those representing the internal part to degree and order 12). A further 80 coefficients (degree and order 8) define the secular variation and, in addition, 26 secular acceleration coefficients (those most significantly determined) are included.
D. R. Barraclough, J. M. Harwood, B. R. Leaton, S. R. C. Malin   +3 more
openaire   +1 more source

Sudden commencement event of 17 April 2002: Aspects of the geomagnetic response at low latitudes [PDF]

, 2005
An analysis of a sudden commencement (SC) manifestation reveals a significant contribution of the polar current system which influences the long-term behavior of the H component at low-latitude ground stations located in the subsolar sector. A transition
Zhang, T.L., P. Di Giuseppe, M. Piersanti, M. Vellante, Villante, U., T. L. Zhang, Di Giuseppe, P., W. Magnes, Vellante, M., Magnes, W., Villante U., Piersanti, M.   +11 more
core   +1 more source

Modeling of regional magnetic field applying spherical functions: practical aspect

Геофизический журнал, 2019
Modeling of geomagnetic field and creation of geomagnetic maps is one of the main directions of geomagnetic studies. For constructing global model the global spherical Lejeandre functions are used in most cases, though for constructing regional magnetic ...
Yu. P. Sumaruk, L. M. Yankiv-Vitkovska, B. B. Dzuman   +2 more
doaj   +1 more source

Monitoring the plasmapause using geomagnetic field line resonances [PDF]

, 2004
This paper discusses the use of ground magnetometer data to derive plasma mass density profiles of the dayside plasmapause region with spatial and temporal resolution in the range 0.15-0.4 R-E and 20-60 min.
Menk, F.W., Mann, I.R., Waters, C.L., Clilverd, M.A., Smith, A.J., Milling, D.K.   +5 more
core   +1 more source

Scaling and a Fokker-Planck model for fluctuations in geomagnetic indices and comparison with solar wind as seen by Wind and ACE [PDF]

, 2005
The evolution of magnetospheric indices on temporal scales shorter than that of substorms is characterized by bursty, intermittent events that may arise from turbulence intrinsic to the magnetosphere or that may reflect solar wind-magnetosphere coupling.
Hnat, B., Rowlands, G. (George), Chapman, Sandra C.   +2 more
core   +1 more source

Report on the magnetic survey in Slovakia for the 2014.5 epoch

Contributions to Geophysics and Geodesy, 2016
The models of the distribution of the elements of the geomagnetic field must be updated regularly. For this purpose geomagnetic measurements have to be carried out repeatedly at geomagnetic observatories as well as at temporary observation points.
Fridrich VALACH, Magdaléna VÁCZYOVÁ, Tomáš ŠOLTIS, Melinda VAJKAI   +3 more
doaj   +1 more source

Aurora-Associated Geomagnetic Activity and Health: A Review With Focus on Neurological Implications. [PDF]

Geohealth
Health Impacts of Aurora‐Related Geomagnetic Activity. Image sources: segments of the figure were created using visuals from Wikipedia Commons, Pixabay, Flaticons, Pikbest, Pxhere, Publicdomainvectors, Openclipart, and Servier Medical Art, all licensed under Creative Commons. Abstract Geomagnetic activity (GMA), particularly during auroras, has emerged
Sethi Y, Vora V, Verma A, Bhatt R, Chaudhary MS, Chopra H, Greig NH.   +6 more
europepmc   +2 more sources