Results 71 to 80 of about 703 (173)

Unraveling Super Equatorial Plasma Bubbles (EPBs) Evolution During the 23 April 2023 Storm: Multi‐Instrument Observations and GITM‐SAMI3 Simulation

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Storm‐time equatorial plasma bubble (EPB) dynamics play a critical role in space weather impacts on communication and navigation systems, yet the mechanisms governing their formation and evolution under storm conditions remain poorly understood.
Shasha Zou, Yulu Peng, Mary Smirnova, Grace Kwon, Zihan Wang, Joseph Huba, Aaron Ridley   +6 more
wiley   +1 more source

Rapid Evolution of Super Equatorial Plasma Bubbles and X‐Pattern EIA Formation During Extreme Storm Conditions on 12 November 2025

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Extreme conditions during storms profoundly alter the evolution of equatorial plasma bubbles (EPBs), yet the key dynamics remains poorly understood. We document the rapid expansion, contraction, and decay of super EPBs in South America during the 12 November 2025 storm with Interplanetary Magnetic Field (IMF) Bz/By magnitude exceeding ∼50 nT ...
Shasha Zou, Lei Liu, Hang Liu, Anthea Coster, Robert Kerr, Jonas Souza, Angela Santos   +6 more
wiley   +1 more source

Retrieval of thermospheric parameters from routinely observed F2-layer Ne(h) profiles at the geomagnetic equator

Journal of Space Weather and Space Climate, 2013
A principal possibility to retrieve basic thermospheric parameters (neutral temperature Tex, atomic [O] and molecular [O2] oxygen as well as molecular nitrogen [N2] concentrations) from the observed daytime electron density profiles Ne(h) in the ...
Zolesi Bruno, Perrone Loredana, Belehaki Anna, Mikhailov Andrei, Tsagouri Ioanna   +4 more
doaj   +1 more source

Daytime Equatorial Spread F‐Like Irregularities Detected by HF Doppler Receiver and Digisonde

, 2021
Daytime equatorial spread F (ESF) is not as common as nighttime ESF due to the presence of a highly conducting E‐layer during the daytime which counteracts the development of F‐layer plasma irregularities.
A. Kascheyev, E. O. Oyeyemi, A. O. Adewale, B. Olugbon, A. B. Rabiu, O. O. Odeyemi, A. A. Obafaye   +6 more
core   +1 more source

Simultaneous observations of irregular sporadic E structures using the LWA and a DPS4D

Frontiers in Astronomy and Space Sciences
Multi-instrument studies have recently shed new light on the morphology of sporadic E, especially intense sporadic E. Here we present simultaneous observations of dense sporadic E (Es) structures using the Long Wavelength Array (LWA) radio telescopes and
K. S. Obenberger, C. A. Taylor, J. J. Colman, E. Dao, J. Dowell, J. V. Eccles, D. J. Emmons, C. T. Fallen, J. M. Holmes, G. B. Taylor   +9 more
doaj   +1 more source

Correlation in f0F2 and M(3000) F2 variations in South-West Europe

Annals of Geophysics, 1996
A statistical analysis of the variations of the hourly daily values of the M(3000)F2 with the corresponding values of critical frequencies f0F2 was provided for two similar ionosondes (Digisonde-256) located in El Arenosillo and Geophysical Observatory ...
E. S. Kazimirovsky, J. M. Vilaplana, L. F. Alberca, J. G. Sole, B. A. de la Morena   +4 more
doaj   +1 more source

Long-Term Observation of the Quasi-3-Hour Large-Scale Traveling Ionospheric Disturbances by the Oblique-Incidence Ionosonde Network in North China. [PDF]

Sensors (Basel), 2021
Zhang R, Chen G, Li Y, Zhang S, Gong W, He Z, Zhang M.   +6 more
europepmc   +1 more source

DINData: A Windows Software to Reformat and Clean Digisonde Numeric Dataset

BIMA JOURNAL OF SCIENCE AND TECHNOLOGY GOMBE
The ionospheric numerical ionogram dataset in the Digisonde Ionogram Database (DIDBase), hosted by the Global Ionospheric Radio Observatory (GIRO), provides an important opportunity to study the bottomside ionospheric electron density profile. However, this dataset often contains inconsistencies, including missing observation periods, irregular time ...
Bello, S.A., Yusuf, K.A., Sharafa, S.B., Shehu, S.J., Joseph, O.A., Oluwafemi, L.D.   +5 more
openaire   +2 more sources

VARIABILITY OF IONOSPHERIC F2 REGION DUE TO SUDDEN STRATOSPHERIC WARMING EVENT OF 2017 [PDF]

Proceedings on Engineering Sciences
We analyzed the impact of minor Arctic sudden stratospheric warming (SSW) event of 2017 on the ionospheric F2 region, using Digisonde data from a low-mid latitude Indian station, Delhi (28.6°N, 77.2°E, 19.2°N geomagnetic latitude, 42.4°N dip).
Qadeer Ahmed, Anshul Singh , N. Praneetha , Ankit Gupta , Arti Bhardwaj , Puja Goel , Arun Kumar Upadhayaya   +6 more
doaj   +1 more source

Middle-Scale Ionospheric Disturbances Observed by the Oblique-Incidence Ionosonde Detection Network in North China after the 2011 Tohoku Tsunamigenic Earthquake. [PDF]

Sensors (Basel), 2021
Wang J, Chen G, Yu T, Deng Z, Yan X, Yang N.   +5 more
europepmc   +1 more source