Article
Engineering, Aerospace
Konstantin Ratovsky, Maxim Klimenko, Roman Vasilyev, Vladimir Klimenko, Aleksey Podlesnyi
Summary: This study investigates the vertical plasma transport in the ionosphere during the St. Patrick's Day storm using observations and modeling. The comparison between model predictions and observational data provides insights into the model's capabilities under storm conditions and the contributions of neutral wind and electric field to changes in ionospheric peak height during geomagnetic storms.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Engineering, Aerospace
S. B. Singh, A. K. Singh
Summary: This paper presents the analysis of a large number of whistlers recorded during the St. Patrick's Day geomagnetic storm in 2015 at the Varanasi ground station. The findings support the theory of duct formations for whistler propagation during geomagnetic storms. The paper also provides calculations of ionospheric parameters based on the recorded whistlers.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Astronomy & Astrophysics
M. Ankita, S. Ram, K. K. Ajith, S. Sripathi
Summary: The plasma density distribution in the equatorial and low latitude ionosphere can be severely disturbed by active space weather events, affecting high frequency radio wave communications. A study on the St. Patrick's Day storm of 2015 reveals a deep plasma depletion near the sunset terminator. Simulations suggest that the depletion is caused by equatorial vertical drift and reinforcement of equatorial ionization anomaly. The study also investigates the impact of these disturbances on skywave communications, highlighting reduced usable HF spectrum and the creation of skip zones.
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
(2023)
Article
Astronomy & Astrophysics
S. Chaudhry, S. C. Chapman, J. Gjerloev, C. D. Beggan
Summary: This study demonstrates that the global dynamics of spatial correlation of Pc2 wave activity can be used to track the evolution of the 2015 St. Patrick's Day geomagnetic storm. By forming a dynamical network from ground-based magnetometer stations, the pattern of spatial coherence is captured and can track the storm evolution. The network parameters reveal a coherent response across different locations and time periods.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Audrey Schillings, Laurianne Palin, Gemma E. E. Bower, Hermann J. Opgenoorth, Steve E. E. Milan, Kirsti Kauristie, Liisa Juusola, Geoff D. D. Reeves, Mike G. G. Henderson, Larry J. J. Paxton, Mark Lester, Maria Hamrin, Max van de Kamp
Summary: During the long main phase of the St Patrick's Day storm on March 17, 2015, three separate enhancements of the westward electrojet were observed through ionospheric equivalent currents computed using geomagnetic data over Fennoscandia. Localised field-aligned current (FAC) systems, identified using data from the IMAGE magnetometer network, were found superimposed on the pre-existing ionospheric current system. These current systems are suggested to be wedgelets, contributing to a larger-scale structure of a substorm current wedge (SCW).
JOURNAL OF SPACE WEATHER AND SPACE CLIMATE
(2023)
Article
Astronomy & Astrophysics
Sk Samin Kader, N. Dashora, K. Niranjan
Summary: This study provides a multi-instrument analysis of the ionospheric response to the St. Patrick's Day storm of 2015. The results show longitudinal differences in the expansions of the auroral oval, as well as zonal movements and enhancements in electron density. The study highlights the importance of considering both spatial and temporal factors in understanding the effects of such storms on the ionosphere.
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
(2022)
Article
Astronomy & Astrophysics
Chao-Song Huang, Yongliang Zhang, Wenbin Wang, Qian Wu, Dong Lin
Summary: We used measurements from the Defense Meteorological Satellite Program to study variations in electron temperature in the subauroral ionosphere during a magnetic storm. We found that the electron temperature at subauroral latitudes was continuously enhanced for 8 days during the storm period, with the maximum temperature being 1000-4000 K higher than during quiet times. This enhancement was attributed to energy transfer among various components of the ionosphere, driven by high-speed solar wind streams and fluctuating interplanetary magnetic field.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Olawale S. Bolaji, Bolarinwa J. Adekoya, Shola J. Adebiyi, Babatunde O. Adebesin, Stephen O. Ikubanni
Summary: This paper investigates the dynamics of the ionosphere around the Equatorial Ionization Anomaly (EIA) region in Africa and its response to solar-magnetospheric energy and momentum. The study finds that the variations in the ionosphere are consistent with the interplanetary fields during different phases of the St. Patrick's Day storms in 2013 and 2015. The observations also reveal hemispheric asymmetries in the ionosphere during the storms.
ASTROPHYSICS AND SPACE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Zhang Xin, Yue MingXin, Zhou GuanQun, Sun JunSong, Wu XiaoPing
Summary: This study investigates the coast effect of geoelectric field in coastal regions based on geoelectric field observations. The results show that the surface current near the coast flows inland, and its influence area is twice as large as previous studies. It indicates that the sea-land interface is the main area of charge accumulation, with positive charge accumulating on the higher resistivity side. This research quantifies the coast effect of surface currents and charges and provides a scientific basis for magnetotelluric data correction and geomagnetic induced current estimation in offshore areas.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2023)
Article
Astronomy & Astrophysics
Sunil Kumar Chaurasiya, Kalpana Patel, Sanjay Kumar, Abhay Kumar Singh
Summary: This study analyzed the impact of the St. Patrick's Day storm that occurred from 17-22 March 2015 on low latitude Indian stations. The vertical total electron content at four different stations was examined, revealing both negative and positive storm effects. Various solar and geomagnetic parameters were analyzed, and the results were explained using disturb dynamo electric field, prompt penetration electric field, and neutral wind effects.
ASTROPHYSICS AND SPACE SCIENCE
(2022)
Article
Astronomy & Astrophysics
Qingyu Zhu, Gang Lu, Yue Deng
Summary: This study investigates the ionospheric response to the 2013 St. Patrick's Day geomagnetic storm in the American sector during the day. The study finds that the ionospheric response can be well reproduced by a model when driven by the electric potential and electron precipitation patterns. The neutral wind transport process is found to be responsible for the observed ionospheric response.
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Nicholas Ssessanga, Mamoru Yamamoto, Susumu Saito
Summary: This paper demonstrates and assesses the capability of advanced 3-D ionosphere tomography technique under severe conditions, focusing on the St. Patrick's day geomagnetic storm in 2015. The results show that the technique has good reconstruction ability under extreme conditions and is consistent with observed data.
EARTH PLANETS AND SPACE
(2021)
Article
Astronomy & Astrophysics
C. S. Carmo, X. Pi, C. M. Denardini, C. A. O. B. Figueiredo, O. P. Verkhoglyadova, G. A. S. Picanco
Summary: This paper presents an analysis of Equatorial Plasma Bubble (EPB) events that occurred in the South America sector on 18 March 2015. The study analyzes data from various instruments and reveals the strong amplitude scintillation and ionospheric irregularities observed during the pre- and post-sunrise hours. The analysis suggests that storm-time wind perturbations triggered the Rayleigh-Taylor instability on the east and west coasts of the South American continent.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Engineering, Aerospace
N. Mridula, G. Manju, S. Sijikumar, Tarun Kumar Pant, Raj Kumar Choudhary
Summary: This study investigates the response of the ionosphere in the Indian region to extreme space weather events using GPS measurements, simulations, and radar observations. The findings show changes in ionospheric parameters and the generation of irregularities during the storm, highlighting the role of thermosphere ionosphere coupling in modulating ionization variability during extreme geomagnetic forcing.
ADVANCES IN SPACE RESEARCH
(2022)
Review
Biochemistry & Molecular Biology
Gregorio Bonsignore, Mauro Patrone, Federica Grosso, Simona Martinotti, Elia Ranzato
Summary: This article discusses the synergistic approach of using natural compounds in combination with classic chemotherapeutic drugs to treat cancer. The focus is primarily on natural compounds that have gained the most research interest.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
