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Found 10 entries in the Bibliography.
Showing entries from 1 through 10
2020 |
Multi-scale ionosphere responses to the May 2017 magnetic storm over the Asian sector We investigate multi-scale ionospheric responses to the May 27, 2017, geomagnetic storm over the Asian sector by using multi-instrumental observations, including ground-based global navigation satellite systems (GNSS) network, constellation observing system for meteorology, ionosphere and climate radio occultation, the FengYun-3C (FY-3C) GNSS occultation sounder electron density profiles and in situ plasma density observations provided by both Swarm and defense meteorological satellite program missions. This geomagnetic s ... Liu, Lei; Zou, Shasha; Yao, Yibin; Aa, Ercha; Published by: GPS Solutions Published on: 12/2019 YEAR: 2020   DOI: 10.1007/s10291-019-0940-1 Blob structure; Positive and negative ionosphere responses; TID; Geomagnetic storms |
Dynamical Properties of Peak and Time-Integrated Geomagnetic Events Inferred From Sample Entropy We provide a comprehensive statistical analysis of the sample entropy of peak and time-integrated geomagnetic events in 2001\textendash2017, considering different measures of event strength, different geomagnetic indices, and a simplified solar wind-magnetosphere coupling function Mourenas, D.; Artemyev, A.; Zhang, X.-J.; Published by: Journal of Geophysical Research: Space Physics Published on: 02/2020 YEAR: 2020   DOI: 10.1029/2019JA027599 Dynamical complexity; Entropy; geomagnetic indices; Geomagnetic storms; Solar wind magnetosphere coupling |
2016 |
The relative contributions of the composition disturbances and the disturbance electric fields in the redistribution of ionospheric plasma is investigated in detail by taking the case of a long-duration positive ionospheric storm that occurred during 18\textendash21 February 2014. GPS total electron content (TEC) data from the Indian Antarctic station, Bharti (69.4\textdegreeS, 76.2\textdegreeE geographic), the northern midlatitude station Hanle (32.8\textdegreeN, 78.9\textdegreeE geographic), northern low-latitude statio ... Shreedevi, P.; Thampi, Smitha; Chakrabarty, D.; Choudhary, R.; Pant, Tarun; Bhardwaj, Anil; Mukherjee, S.; Published by: Journal of Geophysical Research: Space Physics Published on: 02/2016 YEAR: 2016   DOI: 10.1002/2015JA021841 Geomagnetic storms; High latitude low latitude coupling; Ionosphere; positive ionospheric storm |
2015 |
This paper presents a statistical analysis of ionospheric response over ionosonde stations Grahamstown (33.3\textdegreeS, 26.5\textdegreeE, geographic) and Madimbo (22.4\textdegreeS, 30.9\textdegreeE, geographic), South Africa, during geomagnetic storm conditions which occurred during the period 1996\textendash2011. Such a climatological study is important in establishing local ionospheric behavior trend which later forms a basis for accurate modeling and forecasting electron density and critical frequency of the\ Matamba, Tshimangadzo; Habarulema, John; McKinnell, Lee-Anne; Published by: Space Weather Published on: 09/2015 YEAR: 2015   DOI: 10.1002/swe.v13.910.1002/2015SW001218 Geomagnetic storms; ionospheric storm effects; midlatitude ionosphere |
2014 |
Large magnitude increases in ionospheric total electron content (TEC) that occur over 1\textendash3\ h on the dayside are a significant manifestation of the main phases of superstorms. For the largest superstorms of solar cycle 23 (based on the Dst index), ground networks of GPS receivers measured peak total electron content increases greater than a factor of 2 relative to quiet time TEC averaged over the broad latitude band \textpm40\textdegree for local times 1200\textendash1600\ LT. Near 30\textdegre ... Mannucci, A.J.; Crowley, G.; Tsurutani, B.T.; Verkhoglyadova, O.P.; Komjathy, A.; Stephens, P.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 08/2014 YEAR: 2014   DOI: 10.1016/j.jastp.2014.01.001 |
A series of four geomagnetic storms (the minimum SYM-H~-148\ nT) occurred during the March 6\textendash17, 2012 in the ascending phase of the solar cycle 24. This interval was selected by CAWSES II for its campaign. The GPS total electron content (TEC) database and JPL\textquoterights Global Ionospheric Maps (GIM) were used to study vertical TEC (VTEC) for different local times and latitude ranges. The largest response to geomagnetic activity is shown in increases of the low-latitude dayside VTEC. Several GPS sites f ... Verkhoglyadova, O.P.; Tsurutani, B.T.; Mannucci, A.J.; Mlynczak, M.G.; Hunt, L.A.; Paxton, L.J.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 08/2014 YEAR: 2014   DOI: 10.1016/j.jastp.2013.11.009 |
2013 |
In this article, the propagation characteristics of large-scale traveling ionospheric disturbances (LS TIDs) are estimated during the geomagnetic storm periods of 14\textendash16 May 2005 and 25\textendash27 September 2011 over South Africa. One and two GPS arrays have been independently considered for the storms of 15 May 2005 and 26 September 2011, respectively. The average periods of dominant modes (≈ 2.5\textendash3.5h) in the time series data were determined by applying wavelet analysis on both ionosonde and GPS da ... Habarulema, John; Katamzi, Zama; McKinnell, Lee-Anne; Published by: Journal of Geophysical Research: Space Physics Published on: 12/2013 YEAR: 2013   DOI: 10.1002/2013JA018997 characteristics of large scale TIDs; Geomagnetic storms; ionospheric irregularities |
The paper studies the physical mechanisms of the ionospheric storms at equatorial and higher latitudes, which are generally opposite both during the main phase (MP) and recovery phase (RP) of geomagnetic storms. The mechanisms are based on the natural tendency of physical systems to occupy minimum energy state which is most stable. The paper first illustrates the recent developments in the understanding of the mechanisms during daytime MPs when generally negative ionospheric storms (in Nmax and TEC) develop at equatorial ... Balan, N.; Otsuka, Y.; Nishioka, M.; Liu, J; Bailey, G.; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2013 YEAR: 2013   DOI: 10.1002/jgra.50275 |
2012 |
Analyzing the hemispheric asymmetry in the thermospheric density response to geomagnetic storms The thermospheric densities derived by CHAMP/STAR accelerometer within the time period from 01 May 2001 to 31 December 2007 are utilized to investigate the hemispheric asymmetry in response to strong storm driving conditions. The geomagnetic storms of 03\textendash07 April 2004 are first studied since the storms occurred close to the vernal equinox, allowing the seasonal asymmetry to be eliminated to the greatest extent. The averaged density enhancements in the southern polar region were much larger than that in the north ... Ercha, A.; Ridley, Aaron; Zhang, Donghe; Xiao, Zuo; Published by: Journal of Geophysical Research Published on: 08/2012 YEAR: 2012   DOI: 10.1029/2011JA017259 Geomagnetic storms; hemispheric asymmetry; thermospheric density |
2005 |
Introduction to violent Sun-Earth connection events of October\textendashNovember 2003 The solar-terrestrial events of late October and early November 2003, popularly referred to as the Halloween storms, represent the best observed cases of extreme space weather activity observed to date and have generated research covering multiple aspects of solar eruptions and their space weather effects. In the following article, which serves as an abstract for this collective research, we present highlights taken from 61 of the 74 papers from the Journal of Geophysical Research, Geophysical Research Letter ... Gopalswamy, N.; Barbieri, L.; Cliver, E.; Lu, G.; Plunkett, S.; Skoug, R.; Published by: Journal of Geophysical Research Published on: 09/2005 YEAR: 2005   DOI: 10.1029/2005JA011268 coronal mass ejections; Geomagnetic storms; interplanetary shocks; solar energetic particles; Solar flares; superstorms |
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