Mid-latitude effects of “expanded” geomagnetic substorms: a case study

The goal of this work is to examine the effects of the “expanded” or “high-latitude” substorms at mid-latitudes. These substorms are generated at auroral latitudes and propagate up to geomagnetic latitudes above ∼70° GMLat. They are usually observed during reccurent high-speed streams (HSS) from cor...

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Autores principales:	Guineva Veneta, Despirak Irina, Werner Rolf, Bojilova Rumiana, Raykova Lyubomira
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/b41013e5991d4cdcb9869d88d788663a
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spelling	oai:doaj.org-article:b41013e5991d4cdcb9869d88d788663a2021-11-12T11:44:52ZMid-latitude effects of “expanded” geomagnetic substorms: a case study2100-014X10.1051/epjconf/202125401004https://doaj.org/article/b41013e5991d4cdcb9869d88d788663a2021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/08/epjconf_strpep2021_01004.pdfhttps://doaj.org/toc/2100-014XThe goal of this work is to examine the effects of the “expanded” or “high-latitude” substorms at mid-latitudes. These substorms are generated at auroral latitudes and propagate up to geomagnetic latitudes above ∼70° GMLat. They are usually observed during reccurent high-speed streams (HSS) from coronal holes. To identify the substorm activity, data from the networks IMAGE, SuperMAG and INTERMAGNET, and data from the all-sky cameras in Lovozero were used. To verify the interplanetary and geomagnetic conditions, data from the CDAWeb OMNI and from the WDC for geomagnetism at Kyoto were taken. We analyzed one substorm event on 20 February 2017 at ∼18:40 UT, it developed during HSS, in non-storm conditions. Some features of mid-latitude positive bays (MPB) at the European and Asian stations, and in particular at the Scandinavian meridian have been studied: the bay sign conversion from negative to positive values, the longitudinal and latitudinal extent of the MPB. The central meridian of the substorm was determined.Guineva VenetaDespirak IrinaWerner RolfBojilova RumianaRaykova LyubomiraEDP SciencesarticlePhysicsQC1-999ENEPJ Web of Conferences, Vol 254, p 01004 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Guineva Veneta Despirak Irina Werner Rolf Bojilova Rumiana Raykova Lyubomira Mid-latitude effects of “expanded” geomagnetic substorms: a case study
description	The goal of this work is to examine the effects of the “expanded” or “high-latitude” substorms at mid-latitudes. These substorms are generated at auroral latitudes and propagate up to geomagnetic latitudes above ∼70° GMLat. They are usually observed during reccurent high-speed streams (HSS) from coronal holes. To identify the substorm activity, data from the networks IMAGE, SuperMAG and INTERMAGNET, and data from the all-sky cameras in Lovozero were used. To verify the interplanetary and geomagnetic conditions, data from the CDAWeb OMNI and from the WDC for geomagnetism at Kyoto were taken. We analyzed one substorm event on 20 February 2017 at ∼18:40 UT, it developed during HSS, in non-storm conditions. Some features of mid-latitude positive bays (MPB) at the European and Asian stations, and in particular at the Scandinavian meridian have been studied: the bay sign conversion from negative to positive values, the longitudinal and latitudinal extent of the MPB. The central meridian of the substorm was determined.
format	article
author	Guineva Veneta Despirak Irina Werner Rolf Bojilova Rumiana Raykova Lyubomira
author_facet	Guineva Veneta Despirak Irina Werner Rolf Bojilova Rumiana Raykova Lyubomira
author_sort	Guineva Veneta
title	Mid-latitude effects of “expanded” geomagnetic substorms: a case study
title_short	Mid-latitude effects of “expanded” geomagnetic substorms: a case study
title_full	Mid-latitude effects of “expanded” geomagnetic substorms: a case study
title_fullStr	Mid-latitude effects of “expanded” geomagnetic substorms: a case study
title_full_unstemmed	Mid-latitude effects of “expanded” geomagnetic substorms: a case study
title_sort	mid-latitude effects of “expanded” geomagnetic substorms: a case study
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/b41013e5991d4cdcb9869d88d788663a
work_keys_str_mv	AT guinevaveneta midlatitudeeffectsofexpandedgeomagneticsubstormsacasestudy AT despirakirina midlatitudeeffectsofexpandedgeomagneticsubstormsacasestudy AT wernerrolf midlatitudeeffectsofexpandedgeomagneticsubstormsacasestudy AT bojilovarumiana midlatitudeeffectsofexpandedgeomagneticsubstormsacasestudy AT raykovalyubomira midlatitudeeffectsofexpandedgeomagneticsubstormsacasestudy
_version_	1718430574175059968

Mid-latitude effects of “expanded” geomagnetic substorms: a case study

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