Results 71 to 80 of about 447,486 (188)

An Ionospheric Storm Scale Index Based on TEC: Comparative Analysis for China Region

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Defining a standardized ionospheric storm scale is challenging given the ionosphere's inherent complexity and susceptibility to multiple driving factors. In this study, a novel ionospheric storm scale (ISS) index is developed based on statistical analysis of total electron content (TEC) data from 257 ground‐based GNSS stations across China ...
Shuangshuang Shi, Yunfei Shi, Kefei Zhang, Bingfeng Tan, Fucheng Song, Peng Sun, Yu Li, Yifan Liu, Shouxing Zhao   +8 more
wiley   +1 more source

Predicting Geomagnetic Activity in the Ascending and Declining Phases of the Solar Cycle

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Most predictions of space climate, that is, the long‐term behavior of the solar‐terrestrial environment, have focused on forecasting the 11‐year sunspot cycle. Geomagnetic activity, on the other hand, has mainly been predicted in shorter, space weather timescales of up to days to weeks.
Timo Qvick, Timo Asikainen, Kalevi Mursula   +2 more
wiley   +1 more source

ESA Swarm Satellites Plasma Density Products: Comparison and Validation Against Incoherent Scatter Radars Observations

Space Weather, Volume 24, Issue 8, August 2026.
Abstract The European Space Agency's Swarm mission has provided over a decade of continuous in situ measurements of the topside ionospheric plasma. With the release of various official plasma density products and the development of several calibration methods, selecting the most reliable data set has become an important issue for the scientific ...
Alessio Pignalberi, Artem Smirnov, Chao Xiong, Vladimir Truhlik, Roberta Forte, Michael Pezzopane, Vincenzo Ventriglia, Luca Spogli, Lucilla Alfonsi   +8 more
wiley   +1 more source

Auroral Effect on Mid‐Latitude Ionospheric Disturbances Over Europe During the Extreme Geomagnetic Storm of 10 May 2024

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Large ionospheric disturbances were observed over Europe during the extreme geomagnetic storm on 10 May 2024. This study analyzes GNSS‐derived total electron content (TEC) and all‐sky imager data to investigate these disturbances. Pronounced TEC enhancements, irregularities, and strong gradients were confined to the auroral region above the ...
Grzegorz Nykiel, Joanna Kanska, Hiroatsu Sato, Shin‐ichiro Oyama, Kazuo Shiokawa, David R. Themens   +5 more
wiley   +1 more source

Positive and negative ionospheric disturbances prior to the 2016 christmas earthquake in Chile

Geomatics, Natural Hazards & Risk, 2019
Global ionospheric maps (GIMs) provided by the Center for Orbit Determination in Europe (CODE) served to analyze ionospheric disturbances prior to the December 25, 2016 earthquake in Chile.
C. Sotomayor-Beltran
doaj   +1 more source

A comparison of ionospheric TEC between the South Atlantic anomaly region and the Indian Ocean region based on TIEGCM simulations in 2002

Frontiers in Physics
Using the Thermosphere-Ionosphere-Electrodynamic General Circulation Model (TIEGCM), a comparison of the ionospheric total electron content (TEC) between the South Atlantic anomaly (SAA) and the Indian Ocean (IO) at solar maximum is performed in this ...
Zheng Li, Zheng Li, Yan Wang, Jingjing Shao, Luyao Wang, Jingyuan Li, Hua Zhang, Xiaojun Xu, Chunli Gu   +8 more
doaj   +1 more source

Seasonal variations of equatorial anomaly crest using gps ionospheric tomography [PDF]

, 2019
The seasonal variation of the electron density profile in equatorial anomaly region is investigated using Global Positioning System (GPS) ionospheric tomography method from a dense network of Malaysian Real-Time Kinematic Network (MyRTKnet).
Buhari, S. M., Musa, T. A., Khamdan, S. S.   +2 more
core   +1 more source

Simultaneous occurrence of ionization ledge and counterelectrojet in the equatorial ionosphere: observational evidence and its implications

, 1989
In this paper we present observational evidence for the simultaneous occurrence of an ionization ledge in the topside and a counterelectrojet in the E-region altitudes of the equatorial ionosphere.
P. Sharma, R. Raghavarao
core   +1 more source

Pacific Equatorial Transect [PDF]

, 2009
Integrated Ocean Drilling Program Expedition 320/321, "Pacific Equatorial Age Transect" (Sites U1331–U1338), was designed to recover a continuous Cenozoic record of the paleoequatorial Pacific by coring above the paleoposition of the Equator at ...
Isabella, Raffi, M. Lyle, H. Pälike, Edgar, Kirsty; id_orcid, Gamage, Kusali, Lyle, Mitch, Raffi, Isabella, ?, ?, Edgar, Kirsty M, A. Klaus, K. Gamage, H. Nishi, Klaus, Adam, Pälike, Heiko, Lyle, Mitchell, Nishi, Hiroshi, scientists, Expedition 320/321, I. Raffi   +17 more
core   +1 more source

Variabilities in the thermospheric temperatures in the region of the crest of the equatorial ionization anomaly - a case study

, 1995
Results on spectroscopic measurements of thermospheric temperatures made from a low latitude station, Abu (24.6°N, 72.7°E, geographic; 18°N dip latitude), India, situated in the crest region of the equatorial ionization anomaly (EIA), are presented.
R. Suhasini, Suhasini, R., R. Sridharan, Jani, K. G., S. Gurubaran, K.G. Jani, Gurubaran, S., Sridharan, R.   +7 more
core   +1 more source