Results 61 to 70 of about 5,706 (219)
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 +3 more
doaj +1 more source
Circularly Expanding Ring‐Shaped Pulsating Aurora Visualizing the Source of Plasma Waves in Space
AGU Advances, Volume 7, Issue 3, June 2026.Abstract Pulsating aurorae are prominent auroral emissions in the polar regions, typically occurring in the morning hours during the recovery phase of auroral substorms. These aurorae usually consist of round‐shaped patches of emission, with luminosity that pulsates at intervals ranging from less than a second to several tens of seconds.
K. Hosokawa +18 more
wiley +1 more source
Seasonal variabilities of low-latitude mesospheric winds [PDF]
Annales Geophysicae, 1998 Observations of mesospheric winds over a period of four years with the partial reflection radar at Tirunelveli (8.7°N, 77.8°E), India, are presented in this study. The emphasis is on describing seasonal variabilities in mean zonal and meridional winds
R. Rajaram, R. Rajaram, S. Gurubaran
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract The substorm current wedge constitutes the backbone of the substorm current system. Its field‐aligned current components include an upward current in the premidnight sector and a downward current in the midnight‐morning sector, which connect the auroral ionosphere to the magnetotail.
Tsugunobu Nagai, Iku Shinohara
wiley +1 more source
Operations of the World Data Centre for Geomagnetism (Edinburgh) [PDF]
, 2011 The British Geological Survey has operated a World Data Centre for Geomagnetism since 1966. We hold geomagnetic time-series from around 280 observatories worldwide, for a number of time- resolutions from one-minute to annual, along with various magnetic ...
Humphries, Thomas +5 more
core
Geomagnetism and Aeronomy activities in Italy during IGY, 1957/58
, 2009 In 2007 several events were organized to celebrate the fiftieth anniversary of the International Geophysical Year (IGY, 1957-1958). The celebrations will last until 2009 and are taking place within different contexts: the International Polar Year (IPY),
Meloni, A., Alfonsi, Lu.
core +2 more sources
Sudden Commencements in Geomagnetism [PDF]
Nature, 1950 FROM a recent study of geomagnetic ‘sudden commencements’ at seven magnetic observatories, Ferraro and Parkinson1 suggested the possible dependence on magnetic longitude of the occurrence of what they termed “Type II” sudden commencements, that is, the type in which the increase in the horizontal force H is preceded by a smaller preliminary movement in
R A, WATSON, D H, McINTOSH
openaire +2 more sources
Importance of High Cadence Magnetometer Data for Investigating Geomagnetic Disturbances
Space Weather, Volume 24, Issue 6, June 2026.Abstract Geomagnetic disturbances (GMDs) are rapid changes in the magnetic field of the Earth that may drive geomagnetically induced currents (GICs), known to cause damage to infrastructure such as power grids and pipelines. Globally, GIC measurements are often hard to obtain; therefore, GMDs are used as a proxy for GICs.
G. E. Bower +4 more
wiley +1 more source
Geomagnetism : review 2009 [PDF]
, 2010 The Geomagnetism team measures, records, models and interprets variations in the Earth’s natural magnetic fields, across the world and over time. Our data and expertise help to develop scientific understanding of the evolution of the solid Earth and its ...
Thomson, Alan W.P.
core
A Machine‐Learning‐Based Global Thermospheric Density Forecasting Model
Space Weather, Volume 24, Issue 6, June 2026.Abstract Thermospheric mass density governs aerodynamic drag in low Earth orbit and is a primary source of uncertainty in orbit prediction and conjunction assessment, particularly during geomagnetic disturbances. We present AETHER‐P3 ${\mathrm{P}}^{3}$ (Accelerometer‐driven Estimation of THERmospheric density–A Physics‐Informed Probabilistic Prediction
Ruochen Wang, Xiaoli Bai
wiley +1 more source