Results 141 to 150 of about 18,554 (245)

Automatic Real‐Time Ionogram Scaling Method for Global Ionosondes Using Artificial Intelligence

Space Weather, Volume 24, Issue 5, May 2026.
Abstract An ionosonde is an instrument used for local ionosphere remote sensing observations and has the longest history and widest global distribution. Ionograms observed by ionosondes, which depict the electron density profile as a function of virtual height, are critical for ionospheric modeling accuracy and space weather nowcasting.
Peng Liu, Tatsuhiro Yokoyama, Dieter Bilitza, Mamoru Yamamoto, Chun‐Yen Huang, Erlu Chuai, Michi Nishioka   +6 more
wiley   +1 more source

Long‐Term Trends of Ionospheric Peak Electron Density and Height

Space Weather, Volume 24, Issue 5, May 2026.
Abstract Long‐term trends in ionospheric electron density have been investigated using vertical sounding data from 14 ionosonde stations spanning European, Asian, and American longitude sectors. The study examines the relationship between the ionospheric F2 layer peak electron density (NmF2) and height (hmF2) at noontime and midnight with the solar 30 ...
N. Jakowski, M. M. Hoque, M. G. Tan Jun Rios   +2 more
wiley   +1 more source

Observations of High‐Resolution Two‐Dimensional Ionospheric Flow Dynamics Associated With Poleward Boundary Intensifications

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Poleward boundary intensifications (PBIs) are one of the most common auroral disturbances and have been shown to play a key role in substorm dynamics. PBIs are commonly interpreted as the ionospheric signature of magnetotail reconnection, providing insight into X‐line evolution.
Katherine Davidson, Yukitoshi Nishimura, Larry Lyons, Eric Donovan, Vassilis Angelopoulos, Nozomu Nishitani   +5 more
wiley   +1 more source

Inference of the ring current ion composition by means of charge exchange decay [PDF]

The analysis of the measured ion fluxes during the several day storm recovery period and the assumption that beside hydrogen other ions were present and that the decays were exponential in nature, it was possible to establish three separate lifetimes for
Bewtra, N. K., Hoffman, R. A., Smith, P. H.   +2 more
core   +1 more source

On the Strength of Solar Forcing in the Earth's Thermosphere

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract We report the signature of solar forcing in the thermosphere using daytime temperature profiles from the Michelson Interferometer for Global High‐resolution Thermospheric Imaging (MIGHTI) instrument on NASA's Ionospheric Connection (ICON) Explorer mission.
Michael H. Stevens, McArthur Jones Jr., J. Scott Evans, Brian J. Harding, Manbharat S. Dhadly, Thomas J. Immel   +5 more
wiley   +1 more source

Evolution of Magnetospheric Boundary Layers Under the 10 May 2024 ICME Impact

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract On 10 May 2024, an interplanetary coronal mass ejection‐driven shock impacted the dayside magnetopause, compressing it to ∼5 RE. A northward interplanetary magnetic field suppressed dayside reconnection and allowed a clear investigation of the magnetosphere response.
Sheng Li, Gilbert Pi, Zdeněk Němeček, Jana Šafránková, Trevor W. Leonard, Yang‐Yi Sun   +5 more
wiley   +1 more source

A Framework for Evaluating Geomagnetic Indices Forecasting Models

Space Weather
The use of Deep Learning models to forecast geomagnetic storms is achieving great results. However, the evaluation of these models is mainly supported on generic regression metrics (such as the Root Mean Squared Error or the Coefficient of Determination),
Armando Collado‐Villaverde, Pablo Muñoz, Consuelo Cid   +2 more
doaj   +1 more source

Observations of the Magnetopause Reconnection Ion Diffusion Region With High‐Density O+ Ions During the May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Based on high‐resolution measurements from NASA's Magnetospheric Multiscale mission (MMS), we present the first direct observation of an ion diffusion region (IDR) with high number density O+ ions within dayside magnetopause reconnection during the May 2024 superstorm. The O+ ion density reaches a high value of ∼3.3 cm−3.
Anxin Zhang, Suping Duan, Lei Dai, Yuntian Hou, Yong Ren, Chi Wang, S. A. Fuselier, C. Philippe Escoubet, James L. Burch   +8 more
wiley   +1 more source

Frequency‐Dependent Latitudinal Distributions of Plasmaspheric Plume Hiss Directionality and Amplitude

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Plasmaspheric plume hiss plays a crucial role in shaping Earth's electron radiation belts and influencing magnetosphere–ionosphere energy coupling. However, its generation mechanism remains contested between cyclic‐linear and localized‐nonlinear models. By analyzing over 64,000 high‐resolution plume hiss wave segments from the Van Allen Probes
Zhiyong Wu, Zhenpeng Su, Huinan Zheng, Yuming Wang   +3 more
wiley   +1 more source

Analyzing Geomagnetic Data From the Dusheti Observatory During the Intense Magnetic Storms of 2024

Earth and Space Science
Geomagnetic storms, intense disturbances in the Earth's magnetosphere, pose risks to both technology and human activity in space. In this study, we analyzed geomagnetic field measurements from the Dusheti Observatory in Georgia during the intense ...
Oleg Kharshiladze, Luka Tsulukidze, Aleksandre Ghurchumelia, Luca Sorriso‐Valvo, Khatuna Elbakidze, Emiliya Yordanova, Tamaz Matiashvili   +6 more
doaj   +1 more source