Results 51 to 60 of about 132,086 (264)
On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphere [PDF]
, 2017 Direct impact excitation by precipitating electrons is believed to be the main source of 630.0 nm emissions in the cusp ionosphere. However, this paper investigates a different source, 630.0 emissions caused by thermally excited atomic oxygen O$(^{1}$D ...
Johnsen, Magnar G. +3 more
core +3 more sources
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Equatorial electrojet (EEJ) and solar quiet (Sq) currents with one vortex each in either hemisphere are key components of the ionospheric dynamo currents, driving geomagnetic diurnal variations observed at Earth's surface. However, the physical coupling between EEJ and Sq westward currents on the polar side of the vortex focus remains poorly ...
Xiaocan Liu +3 more
wiley +1 more source
Remote SensingIn the current work, authors reviewed the latest research results in landslide susceptibility mapping (LSM) using artificial intelligence (AI) methods.
Muratbek Kudaibergenov +7 more
doaj +1 more source
Method and apparatus for calibrating the ionosphere and application to surveillance of geophysical events [PDF]
, 1984 The columnar electron content of the ionosphere between a spacecraft and a receiver is measured in realtime by cross correlating two coherently modulated signals transmitted at different frequencies (L1,L2) from the spacecraft to the receiver using a ...
Macdoran, P. F.
core +1 more source
Measurement of the Parallax of PSR B0950+08 Using the VLBA
, 2000 A new technique has been developed to remove the ionosphere's distorting effects from low frequency VLBI data. By fitting dispersive and non-dispersive components to the phases of multi-frequency data, the ionosphere can be effectively removed from the ...
A. J. Beasley +6 more
core +2 more sources
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Interactions of solar wind dynamic pressure (SWDP) discontinuities with Earth's magnetosphere cause geomagnetic Sudden Commencements (SCs). Typically, positive/negative SCs occur at low latitudes due to enhancements/reductions in SWDP.
Deeksha Rai +10 more
wiley +1 more source
Downward auroral currents from the reconnection Hall-region [PDF]
, 2011 We present a simple (stationary) mechanism capable of generating the auroral downward field-aligned electric field {that is} needed for {accelerating the ionospheric electron component up into the magnetosphere and confining the ionospheric ions at low ...
Baumjohann, W. +2 more
core +3 more sources
Observational Evidence for Wind‐Driven Low‐Pass Filtering of Infrasound at Short Range
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Infrasound from controlled explosions provides a unique opportunity to isolate atmospheric effects on propagation. We report observations from two campaigns in May and October 2024, each featuring 10‐ton TNT‐equivalent controlled surface chemical explosions recorded by a dense network of 31 single‐sensor stations within 23 km.
Elizabeth A. Silber +10 more
wiley +1 more source
AtmosphereGeomagnetic activity reflects the complex coupling between the solar wind, magneto-sphere and ionosphere. While the global Kp index serves as a standard proxy for geo-magnetic disturbances, it obscures regional variations linked to local current systems ...
Vitaliy Kapytin +6 more
doaj +1 more source
Quiet time F2-layer disturbances: seasonal variations of the occurrence in the daytime sector [PDF]
Annales Geophysicae, 2009 Earlier revealed seasonal/latitudinal variations of the occurrence for positive and negative F2-layer Q-disturbances have been interpreted in the framework of the present-day concept of the thermosphere-ionosphere interaction. The basic process is the
A. V. Mikhailov +2 more
doaj +1 more source