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The impact of coronal mass ejection on the horizontal geomagnetic fields and the induced geoelectric fields

Citation

Falayi, EO and Adebesin, BO and Bolaji, OS, The impact of coronal mass ejection on the horizontal geomagnetic fields and the induced geoelectric fields, Advances in Space Research, 61, (3) pp. 985-1003. ISSN 0273-1177 (2018) [Refereed Article]

Copyright Statement

Copyright 2017 COSPAR

DOI: doi:10.1016/j.asr.2017.11.005

Abstract

This work investigates the influence of coronal mass ejection (CME) on the time derivatives of horizontal geomagnetic and geoelectric fields, proxy parameters for identifying GICs. 16 events were identified for the year 2003 from the CORONAS-PHOTON spacecraft. Five of the events (May 29, June 9, October 28, October 29, and November 4) were extensively discussed over four magnetic observatories, were analyzed using the time derivatives of the horizontal geomagnetic (dH/dt) and geoelectric (EH) fields obtained from data of the INTERMAGNET network. It was observed that energy distributions of the wavelet power spectrum of the horizontal geoelectric field are noticed at the nighttime on both 29 May and 9 June 2003 across the stations. Daytime and nighttime intensification of energy distribution of the wavelet power spectrum of the horizontal geoelectric field are observed on both 28 and 29 October 2003 due to strong westward electrojet. The 4 November 2003 event depicts daytime amplification of energy distributions of the wavelet power spectrum across the stations. The highest correlation magnitude is obtained in the event of 4 November 2003 between dH/dt and EH relationships during the intense solar flare of class X 17.4. We observed that the correlation magnitude between dH/dt and EH increases with increase in CME activity. We concluded that the response of the surface impedance model for different stations plays a key role in determining the surface electric field strength, due to large electric field changes at different stations.

Item Details

Item Type:Refereed Article
Keywords:geomagnetic field and geoelectric field, geomagnetic induced current, solar flares, space weather, electric fields, power spectrum, electric field change, geoelectric, geomagnetic induced currents, solar flare, space weather, surface electric fields
Research Division:Physical Sciences
Research Group:Space sciences
Research Field:Mesospheric, thermospheric, ionospheric and magnetospheric physics
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Atmospheric processes and dynamics
UTAS Author:Bolaji, OS (Dr Olawale Bolaji)
ID Code:140024
Year Published:2018
Web of Science® Times Cited:1
Deposited By:Physics
Deposited On:2020-07-22
Last Modified:2020-08-31
Downloads:0

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