Results 61 to 70 of about 12,426 (190)

Effects of Solar Variability on Tropical Cyclone Activity

Earth and Space Science
The current study explores the relationship between solar variability and tropical cyclone (TC) activity using sunspot number (SSN) and TC best‐track data as respective proxies.
Chinmaya Nayak, Jayashree Bulusu, Geeta Vichare, A. P. Dimri   +3 more
doaj   +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

Ionosphere‐Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The May 2024 superstorm, as the most intense geomagnetic storm since 2003, caused a variety of disturbances in the magnetosphere‐ionosphere‐thermosphere system. This study investigates the long‐lasting electron density depletion in the polar region and the underlying ionosphere‐thermosphere coupling, based on a comprehensive set of ...
Lei Cai, Anita Aikio, G. P. Geethakumari, Heikki Vanhamäki, I. I. Virtanen, Shin‐ichiro Oyama, Yongliang Zhang, Jiaojiao Zhang, Marc Hairston   +8 more
wiley   +1 more source

Low-latitude geomagnetic signatures during major solar energetic particle events of solar cycle-23 [PDF]

Annales Geophysicae, 2006
The frequency of occurrence of disruptive transient processes in the Sun is enhanced during the high solar activity periods. Solar cycle-23 evidenced major geomagnetic storm events and intense solar energetic particle (SEP) events.
R. Rawat, S. Alex, G. S. Lakhina
doaj   +1 more source

Galactic Cosmic Ray Ionization on Uranus; Geomagnetic Latitude Dependencies

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Galactic Cosmic Rays (GCRs) are a major source of atmospheric ionization, influencing ion abundance, aerosol formation, and electrical processes. GCR‐induced effects are expected to be more pronounced on Uranus than planets closer to the Sun for two reasons; reduced solar irradiance, and weaker solar modulation of incident GCR.
Ola Al‐Khuraybi, Karen L. Aplin, Alberto Gambaruto   +2 more
wiley   +1 more source

Geomagnetic Polarity Timescale [PDF]

, 2001
Dating and time control are essential geoscience, because they allow us to rock sequences from different environments of deposition. Most importantly, accurate time control allows us to calculate rates of change, which is necessary for understanding underlying processes and mechanisms.
Langereis, Cor G., Krijgsman, Wout
openaire   +1 more source

Forecasting Local Ionospheric Parameters Using Transformers

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract We present a novel method for forecasting key ionospheric parameters using transformer‐based neural networks. The model provides accurate forecasts and uncertainty quantification of the F2‐layer peak plasma frequency (foF2), the F2‐layer peak density height (hmF2), and total electron content for a given geographic location.
D. J. Alford‐Lago, C. W. Curtis, A. T. Ihler, D. P. Drob, K. A. Zawdie   +4 more
wiley   +1 more source

A Novel Deep Learning Approach for TEC Map Completion Using Image Equation‐Guided Loss

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract This study introduces the Image Equation Mechanism‐Completion Generative Adversarial Network (IEM‐CGAN), a groundbreaking deep learning framework that revolutionizes the reconstruction of large‐scale global ionospheric total electron content (TEC) maps.
Qingfeng Li, Hanxian Fang, Chao Xiao, Die Duan, Hongtao Huang, Ganming Ren, Xuhui Shen   +6 more
wiley   +1 more source

Observations of Electrostatic Solitary Waves in the Martian Magnetic Reconnection Exhaust Region

The Astrophysical Journal
This study reports for the first time the occurrence of electrostatic solitary waves during a reconnection exhaust event observed by NASA’s Mars Atmosphere and Volatile Evolution mission on 2015 February 9 in the dayside Martian magnetosheath region.
Nivedita Chakraborty, Devanandhan S, Satyavir Singh, Gurbax Singh Lakhina   +3 more
doaj   +1 more source

Mapping a Magnetic Superstorm: March 1989 Geoelectric Hazards and Impacts on United States Power Systems

Space Weather, 2022
A study is made of the relations between geomagnetic and geoelectric field variation, Earth‐surface impedance, and operational interference (“anomalies”) experienced on electric‐power systems across the contiguous United States during the 13–14 March ...
Jeffrey J. Love, Greg M. Lucas, E. Joshua Rigler, Benjamin S. Murphy, Anna Kelbert, Paul A. Bedrosian   +5 more
doaj   +1 more source