scholarly journals Structuring of intermediate scale equatorial spread F irregularities during intense geomagnetic storm of solar cycle 24

2016 ◽  
Vol 121 (7) ◽  
pp. 7001-7012 ◽  
Author(s):  
B. Kakad ◽  
P. Gurram ◽  
P. N. B. Tripura Sundari ◽  
A. Bhattacharyya
Keyword(s):  
Solar Cycle ◽  
Geomagnetic Storm ◽  
Intermediate Scale ◽  
Equatorial Spread F ◽  
Solar Cycle 24 ◽  
Spread F ◽  
Cycle 24

scholarly journals The Solar Event of 14 – 15 July 2012 and Its Geoeffectiveness

Solar Physics ◽  
2020 ◽  
Vol 295 (10) ◽  
Author(s):  
Agnieszka Gil ◽  
Renata Modzelewska ◽  
Szczepan Moskwa ◽  
Agnieszka Siluszyk ◽  
Marek Siluszyk ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Geomagnetic Storm ◽  
Transmission Lines ◽  
Large Angle ◽  
Solar Origin ◽  
Electric Transmission Lines ◽  
Solar Cycle 24 ◽  
Cycle 24 ◽  
Ap Index ◽  
Halo Coronal Mass Ejection

Abstract During Solar Cycle 24, which started at the end of 2008, the Sun was calm, and there were not many spectacular geoeffective events. In this article, we analyze the geomagnetic storm that happened on 15 July 2012 during the 602nd anniversary of the Polish Battle of Grunwald, thus we propose this event to be called the “Battle of Grunwald Day Storm”. According to NOAA scale, it was a G3 geomagnetic storm with a southward component of the heliospheric magnetic field, $Bz$ B z , falling to −20 nT, minimum Dst index of −139 nT, AE index of 1368 nT, and Ap index of 132 nT. It was preceded by a solar flare class X1.4 on 12 July. This geomagnetic storm was associated with the fast halo coronal mass ejection at 16:48:05 UT on 12 July, first appearance in the Large Angle and Spectroscopic Coronagraph C2, with a plane-of-sky speed of 885 km s−1 and maximum of 1415 km s−1. This geomagnetic storm was classified as the fourth strongest geomagnetic storm of Solar Cycle 24. At that time, a significant growth in the failures of the Polish electric transmission lines was observed, which could have a solar origin.

scholarly journals The first super geomagnetic storm of solar cycle 24: “The St. Patrick’s day event (17 March 2015)”

2016 ◽  
Vol 68 (1) ◽  
Author(s):  
Chin-Chun Wu ◽  
Kan Liou ◽  
Ronald P. Lepping ◽  
Lynn Hutting ◽  
Simon Plunkett ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Geomagnetic Storm ◽  
Solar Cycle 24 ◽  
Cycle 24

scholarly journals Solar Variation and Super Geomagnetic Storm Event during March 10-31, 2015

2019 ◽  
Vol 9 (1) ◽  
pp. 2469-2472
Keyword(s):  
Magnetic Field ◽  
Solar Cycle ◽  
Geomagnetic Storm ◽  
Space Weather ◽  
Solar Flares ◽  
Storm Event ◽  
Earth Magnetic Field ◽  
Solar Cycle 24 ◽  
Cycle 24

CMEs and solar flares are important solar ejections which are the cause of storm in Heliosphere. These ejections are producing a change in Earth magnetic field. In this paper we have studied heliospheric disturbance of solar cycle 24 during period from 10 March to 31 March 2015. We observed that a huge explosion of magnetic field and plasma from the Sun’s corona on 15 March 2015 and associated solar flares have disturbed space weather towards earth causes strongest geomagnetic storm on 17 March 2015. We found that Dst value reached to its minimum is -223 nT and a FDs during the period on 17 March 2015.

scholarly journals South Atlantic Anomalyduring ascending and maximum phase of solar cycle 24

2020 ◽  
Author(s):  
Khairul Afifi Nasuddin ◽  
Mardina Abdullah ◽  
Nurul Shazana Abdul Hamid
Keyword(s):  
Solar Cycle ◽  
Geomagnetic Storm ◽  
South Atlantic ◽  
Research Experience ◽  
Maximum Phase ◽  
High Latitude Region ◽  
Normal Period ◽  
Solar Cycle 24 ◽  
Latitude Region ◽  
Cycle 24

Abstract. For this research, four regions have been studied which are the South Atlantic Anomaly (SAA) region, low latitude region, middle latitude region and high latitude region. The active period which is the period when the geomagnetic storm occur chosen to be analyzed is on 6 August 2011 and 12 April 2014 and the normal period, a period when no geomagnetic storm happen is on 24 July 2011 and 14 May 2014. Year 2011 is chosen to be analyze in order to study the SAA region during the ascending phase of the solar cycle 24 and in year 2014, where the occurrence of the maximum phase of solar cycle 24 occur. The research is carried since there is no clear characterization of the SAA during ascending as well as maximum phase based on power spectrum analysis method. The Earth's magnetic field component chosen to be analyzed is the horizontal intensity (H) due to its sensitiveness regarding geomagnetic activeness. From the research conducted, the result reveal SAA region has a tendency to be persistent during both period compare to other region during both phases. Other regions in the research experience a tendency to be persistent and antipersistent.

Geomagnetic Consequences of Interacting CMEs of June 13-14, 2012

2017 ◽  
Vol 13 (S335) ◽  
pp. 65-68
Author(s):  
Nandita Srivastava ◽  
Zavkiddin Mirtoshev ◽  
Wageesh Mishra
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Solar Cycle ◽  
Geomagnetic Storm ◽  
Solar Wind Plasma ◽  
Single Step ◽  
Solar Cycle 24 ◽  
In Situ Observations ◽  
Cycle 24

AbstractWe have studied the consequences of interacting coronal mass ejections (CMEs) of June 13-14, 2012 which were directed towards Earth and caused a moderate geomagnetic storm with Dst index ~ −86 nT. We analysed the in-situ observations of the solar wind plasma and magnetic field parameters obtained from the OMNI database for these CMEs. The in-situ observations show that the interacting CMEs arrive at Earth with the strongest (~ 150 nT) Sudden Storm Commencement (SSC) of the solar cycle 24. We compared these interacting CMEs to a similar interaction event which occurred during November 9-10, 2012. This occurred in the same phase of the solar cycle 24 but resulted in an intense geomagnetic storm (Dst ~ −108 nT), as reported by Mishra et al. (2015). Our analysis shows that in the June event, the interaction led to a merged structure at 1 AU while in the case of November 2012 event, the interacted CMEs arrived as two distinct structures at 1 AU. The geomagnetic signatures of the two cases reveal that both resulted in a single step geomagnetic storm.

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