Results 51 to 60 of about 13,437 (258)

Recent work at the World Data Centre for Geomagnetism (Edinburgh) [PDF]

, 2010
Observatory data holdings at the World Data Centre for Geomagnetism (Edinburgh) www.wdc.bgs.ac.uk include minute, hourly and annual mean values of the geomagnetic field from over 500 observatories since the early 19th century.
Dawson, Ewan, Macmillan, Susan, Reay, Sarah   +2 more
core  

Detection of Equatorial Plasma Bubbles Using the COSMIC‐2 Rate of TEC Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Equatorial plasma bubbles (EPBs) are large‐scale plasma depletion structures that can disrupt Global Navigation Satellite Systems (GNSS) and other space‐based technologies. Several instruments have been employed to study EPB dynamics, with Total Electron Content (TEC) and Rate of TEC change Index (ROTI) data standing out as valuable parameters
Ana L. Christovam, Fabricio S. Prol, Marcio T. A. H. Muella   +2 more
wiley   +1 more source

Investigating Magnetosphere‐Ionosphere‐Thermosphere Coupling During Geomagnetic Storms With a Novel Thermospheric Disturbance Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract This study introduces a novel thermospheric disturbance index, JpT ${J}_{p}^{T}$, designed to describe density variations during geomagnetic storms. The index is constructed by applying the spectral whitening method to thermospheric density data derived from precise orbit determination of satellites from 2015 to 2019.
Yihan Wu, Tian Mao, Jing‐Song Wang, Xiao‐Wei Zhao, Zhou Chen, Ming‐Xian Zhao   +5 more
wiley   +1 more source

Solar flux dependence of coherence scales in scintillation patterns produced by ESF irregularities [PDF]

Annales Geophysicae, 2005
The coherence scale length, defined as the 50% decorrelation scale length along the magnetic east-west direction, in the ground scintillation pattern obtained at a dip equatorial location, due to scattering of VHF radio waves by equatorial spread F ...
B. Engavale, K. Jeeva, K. U. Nair, A. Bhattacharyya   +3 more
doaj   +1 more source

A different interpretation of the annual and semiannual anomalies on the magnetic activity over the Earth [PDF]

, 2012
The H component of the magnetic field measured at the terrestrial surface presents several periodic signals caused by changes in the ring current that flows within the terrestrial magnetosphere.
Azpilicueta, Francisco Javier, Brunini, Claudio Antonio   +1 more
core   +2 more sources

A Hierarchical Bayesian Model for the Global Holocene Geomagnetic Field

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract We present a hierarchical Bayesian model of the global geomagnetic field for the last 8,000 years. The model is built solely with thermoremanent records, which include archeomagnetic and volcanic data. Building upon previous work, this model includes fewer approximations and treats model hyperparameters as probabilistic variables.
M. A. Schanner, S. Panovska, M. Korte
wiley   +1 more source

Unseasonal development of post-sunset F-region irregularities over Southeast Asia on 28 July 2014: 2. Forcing from below?

Progress in Earth and Planetary Science, 2018
An unseasonal development of Equatorial Plasma Bubble (EPB)/Equatorial Spread-F (ESF) activity in a wide longitudinal sector over India and Southeast Asia during the post-sunset hours of 28 July 2014 has been investigated in detail using the multiple ...
K. K. Ajith, S. Tulasi Ram, B. A. Carter, S. Sathish Kumar, M. Yamamoto, T. Yokoyama, S. Gurubaran, S. Sripathi, K. Hozumi, K. Groves, R. G. Caton   +10 more
doaj   +1 more source

A low-power data acquisition system for geomagnetic observatories and variometer stations [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2017
A modern geomagnetic observatory must provide data of high stability, continuity, and resolution. The INTERMAGNET network has therefore specified quantitative criteria to ensure a high quality standard of geomagnetic observatories.
A. Morschhauser, J. Haseloff, O. Bronkalla, C. Müller-Brettschneider, J. Matzka   +4 more
doaj   +1 more source

Exploring Enceladus's Interior Structure Using Electromagnetic Induction

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Electromagnetic (EM) sounding can constrain the electrical structure of Enceladus and, in turn, the salinity of its ocean and the porosity, fluid content, and thermal state of its hydrothermally active core. Here, we assess the feasibility of EM sounding at Enceladus using both global (orbiter) and local (lander) EM induction transfer ...
Alexander Grayver, Joachim Saur
wiley   +1 more source

Investigation of global lightning using Schumann resonances measured by high frequency induction coil magnetometers in the UK [PDF]

, 2013
In June 2012, the British Geological Survey (BGS) Geomagnetism team installed two high frequency (100 Hz) induction coil magnetometers at the Eskdalemuir Observatory, in the Scottish Borders of the United Kingdom. The induction coils permit us to measure
Beggan, Ciaran D., Thomson, Alan
core   +1 more source