The induced surface electric response in Europe to 2015 St. Patrick's Day geomagnetic storm. (November 2018)

• Record Type: Journal Article
• Authors: Demetrescu, C.; Dobrica, V.; Greculeasa, R.; Stefan, C.
• Is Part Of: Journal of atmospheric and solar-terrestrial physics. Volume 180(2018)
• Page Start: 106
• Page End: 115
• Publication Date: 2018-11
• Subjects: 2015 St. Patrick's Day geomagnetic storm -- Surface geoelectric field -- European geomagnetic observatories -- Space weather hazard (GICs); Geophysics -- Periodicals; Atmospheric physics -- Periodicals; Géophysique -- Périodiques; Météorologie physique -- Périodiques; Electronic journals; 551.51
• DOI: 10.1016/j.jastp.2017.09.003
• Languages: English
• ISSNs: 1364-6826

Abstract

Abstract: The largest geomagnetic storm in solar cycle 24 is investigated from the dual perspective of (1) solar source – solar wind – geomagnetic storm chain and (2) the hazardous induced response as shown by the surface electric field. The study is based on heliospheric magnetic field and solar wind data, on one hand, and on recorded 1-min geomagnetic data from the INTERMAGNET network of European geomagnetic observatories, on the other. The lateral distribution of the induced electric response for the European continent during the considered storm is shown, and the timing of the maximum induced horizontal geoelectric vector is discussed in terms of specific moments of the storm development. Highlights: Partial ring current episodes determine the second part of the main phase. Emax occurrence controlled by certain storm episodes (SSC, partial ring current). Timing of Emax occurrence is also sensitive to subsurface conductivity.