Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during main phase of magnetic storm

Veenadhari, Bhaskara; Kikuchi, Takashi; Kumar, Sandeep; Tulasiram, S.; Chakrabarty, D.; Ebihara, Yusuke; Reeves, Geoffrey D.

doi:10.1016/j.asr.2019.04.001

Title: Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during main phase of magnetic storm

Full Record
Other Related Research

Abstract

During the geomagnetic storm periods, the convection electric field penetrates promptly to equatorial latitudes, causing an eastward electric field in the dayside ionosphere. Occasionally, the polarity of the dayside ionospheric electric field is inverted when the Interplanetary Magnetic Field (IMF) turns northward. Here, in this work, interesting observations of the strong westward electric field in the day side equatorial latitudes are presented, as evidenced by strong Counter Electrojet (CEJ) at Indian and Japanese sectors under the steady southward IMF Bz. The westward electric field perturbations are quite large with CEJ amplitude of ~-120 nT over the Indian sector (14–15 December 2006) and ~-220 nT for Japanese sector (7–8 November 2004). The plausible mechanisms for the observed overshielding electric fields under steady southward IMF Bz have been investigated in light of the possible role of substorm activity. The clear signatures of substorm were observed at geosynchronous particle flux measurements from LANL (Los Alamos National Laboratory) satellite and associated with sudden decrease in AL index. The observed variations of asymmetric ring current shows the enhancement of Partial Ring Current (PRC) at the dusk sector further supporting the substorm onset during that period which will probably enhance the overshielding due to increased Regionmore »« less

Authors:

Veenadhari, Bhaskara ^[1]; Kikuchi, Takashi ^[2];

^[3]; Tulasiram, S. ^[1]; Chakrabarty, D. ^[4]; Ebihara, Yusuke ^[5];

^[6]

Indian Institute of Geomagnetism, New Panvel (India)
Nagoya Univ. (Japan); Kyoto Univ. (Japan)
Indian Institute of Geomagnetism, New Panvel (India); Physical Research Laboratory, Navrangpura (India)
Physical Research Laboratory, Navrangpura (India)
Kyoto Univ. (Japan)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Sat Apr 27 00:00:00 EDT 2019

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE; National Aeronautics and Space Administration (NASA)

OSTI Identifier:: 1557777

Report Number(s):: LA-UR-16-22088
Journal ID: ISSN 0273-1177

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: Advances in Space Research

Additional Journal Information:: Journal Volume: 64; Journal Issue: 10; Journal ID: ISSN 0273-1177

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; Heliospheric and Magnetospheric Physics; Equatorial electric fields; Magnetic storm; Substorm; Overshielding electric field; Counter electrojet

Citation Formats


                    Veenadhari, Bhaskara, Kikuchi, Takashi, Kumar, Sandeep, Tulasiram, S., Chakrabarty, D., Ebihara, Yusuke, and Reeves, Geoffrey D. Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during main phase of magnetic storm.  United States: N. p., 2019. 
Web.  doi:10.1016/j.asr.2019.04.001.

Copy to clipboard


                    Veenadhari, Bhaskara, Kikuchi, Takashi, Kumar, Sandeep, Tulasiram, S., Chakrabarty, D., Ebihara, Yusuke, & Reeves, Geoffrey D. Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during main phase of magnetic storm.  United States.  https://doi.org/10.1016/j.asr.2019.04.001

Copy to clipboard


                    Veenadhari, Bhaskara, Kikuchi, Takashi, Kumar, Sandeep, Tulasiram, S., Chakrabarty, D., Ebihara, Yusuke, and Reeves, Geoffrey D. Sat .  
"Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during main phase of magnetic storm".  United States.  https://doi.org/10.1016/j.asr.2019.04.001.  https://www.osti.gov/servlets/purl/1557777.

Copy to clipboard


                    
@article{osti_1557777,

  title        = {Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during main phase of magnetic storm},

  author       = {Veenadhari, Bhaskara and Kikuchi, Takashi and Kumar, Sandeep and Tulasiram, S. and Chakrabarty, D. and Ebihara, Yusuke and Reeves, Geoffrey D.},

  abstractNote = {During the geomagnetic storm periods, the convection electric field penetrates promptly to equatorial latitudes, causing an eastward electric field in the dayside ionosphere. Occasionally, the polarity of the dayside ionospheric electric field is inverted when the Interplanetary Magnetic Field (IMF) turns northward. Here, in this work, interesting observations of the strong westward electric field in the day side equatorial latitudes are presented, as evidenced by strong Counter Electrojet (CEJ) at Indian and Japanese sectors under the steady southward IMF Bz. The westward electric field perturbations are quite large with CEJ amplitude of ~-120 nT over the Indian sector (14–15 December 2006) and ~-220 nT for Japanese sector (7–8 November 2004). The plausible mechanisms for the observed overshielding electric fields under steady southward IMF Bz have been investigated in light of the possible role of substorm activity. The clear signatures of substorm were observed at geosynchronous particle flux measurements from LANL (Los Alamos National Laboratory) satellite and associated with sudden decrease in AL index. The observed variations of asymmetric ring current shows the enhancement of Partial Ring Current (PRC) at the dusk sector further supporting the substorm onset during that period which will probably enhance the overshielding due to increased Region 2 Field-Aligned Currents (R2 FACs). Finally, the observations of such significantly large amplitudes of CEJ associated with the substorm related overshielding events are sparse and the results bring out the important role of substorm onset and the development of PRC in accordance with the R2 FACs during intense magnetic storms which alter the day time equatorial electric field perturbations.},

  doi          = {10.1016/j.asr.2019.04.001},

  journal      = {Advances in Space Research},

  number       = 10,

  volume       = 64,

  place        = {United States},

  year         = {Sat Apr 27 00:00:00 EDT 2019},

  month        = {Sat Apr 27 00:00:00 EDT 2019}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.asr.2019.04.001

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 4 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Contribution of storm time substorms to the prompt electric field disturbances in the equatorial ionosphere

Journal Article Hui, Debrup ; Chakrabarty, D. ; Sekar, R. ; ... - Journal of Geophysical Research. Space Physics

This study tries to bring out the fact that storm time substorms can compete and at times significantly contribute to the geomagnetically disturbed time prompt penetration electric field effects on low and equatorial latitudes. Observations of unusual equatorial plasma drift data from Jicamarca Unattended Long-term Investigations of the Ionosphere and Atmosphere during two space weather events show that substorms can induce both eastward and westward penetration electric fields under steady southward interplanetary magnetic field (IMF B_z) conditions. During the first event on 2 January 2005, the enhancement of the daytime eastward electric field over Jicamarca due to substorm is foundmore »« less
Cited by 14
https://doi.org/10.1002/2016JA023754

Full Text Available
Large scale response of the magnetosphere to a southward turning of the interplanetary magnetic field

Journal Article Sauvaud, J A ; Treilhou, J P ; Saint-Marc, A ; ... - Journal of Geophysical Research; (United States)

A set of coordinated measurements obtained on March 4, 1979, in the solar wind, in the magnetotail, at geostationary orbit, in the auroral ionosphere and on the ground allowed a detailed study of the overall magnetospheric response to a southward turning of the interplanetary magnetic field. this study shows that the magnetosphere responds without any appreciable delay to the change of the interplanetary magnetic field (IMF) direction. The intensity of the electrojets increases, and both westward electrojet and auroral forms move southward in the night sector. The magnetic field topology in the inner nightside magnetosphere (6.6 R{sub E}) becomes increasinglymore »« less
https://doi.org/10.1029/JA092iA03p02365
Solar-wind dependencies of high-latitude convection and precipitation

Technical Report Foster, J C ; Holt, J M ; Musgrove, R G ; ...

The solar-wind plasma and interplanetary magnetic field (IMF) dependencies of the patterns of plasma convection and particle precipitation in the high-latitude ionosphere were investigated by constructing average patterns of the ionospheric electric field and the precipitating energy influx of different solar-wind conditions. A data base of over 100 days' observations of high-latitude plasma convection with the Millstone Hill radars was sorted and binned according to the one-hour averaged values of MF Bz and Bv. The individual line of sight velocities observed by the radar were combined in each magnetic latitude-local time bin to derive statistically averaged convection patterns between 50more »« less
Magnetospheric convection effects at mid-latitudes. 1. Saint-Santin observations

Journal Article Blanc, M - J. Geophys. Res.; (United States)

We use E x B data from the Saint-Santin incoherent scatter facility to study the behavior of mid-latitude ionospheric electric fields during magnetic storms and substorms. To this end, we analyze the relation between departures of the Saint-Santin field from its quiet day values and the simultaneous variations of parameters characterizing the state of magnetospheric convection: the IMF B/sub Z/ component, the auroral electrojet index, and the ring current inflation rate as deduced from time variations of the Dst index. Mid-latitude E x B drift disturbances, when they occur during substorms, are generally associated with a large southward value ofmore »« less
https://doi.org/10.1029/JA088iA01p00211
The Ionospheric Impact of an ICME-Driven Sheath Region Over Indian and American Sectors in the Absence of a Typical Geomagnetic Storm

Journal Article Rout, Diptiranjan ; Chakrabarty, D. ; Sarkhel, S. ; ... - Journal of Geophysical Research. Space Physics

On 13 April 2013, the ACE spacecraft detected arrival of an interplanetary shock at 2250 UT, which is followed by the passage of the sheath region of an interplanetary coronal mass ejection (ICME) for a prolonged (18-hr) period. The polarity of interplanetary magnetic field Bz was northward inside the magnetic cloud region of the ICME. The ring current (SYM-H) index did not go below -7 nT during this event suggesting the absence of a typical geomagnetic storm. In this paper, the responses of the global ionospheric electric field associated with the passage of the ICME sheath region have been investigatedmore »« less
Cited by 4
https://doi.org/10.1029/2018JA025334

Full Text Available

Similar Records