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Superposed epoch analysis of the Dst index and interplanetary shocks observed at 1 au

SYSNO ASEP	0503964
Document Type	A - Abstract
R&D Document Type	The record was not marked in the RIV
R&D Document Type	Není vybrán druh dokumentu
Title	Superposed epoch analysis of the Dst index and interplanetary shocks observed at 1 au
Author(s)	Krupařová, Oksana (UFA-U)_{RID, ORCID} Krupař, Vratislav (UFA-U)_{RID, ORCID} Šafránková, J. (CZ) Němeček, Z. (CZ) Santolík, Ondřej (UFA-U)_{RID, ORCID}
Number of authors	5
Source Title	Geophysical Research Abstracts, EGU General Assembly 2018, Vol. 21. - Göttingen : European Geosciences Union, 2019 EGU2019-11217
Number of pages	1 s.
Publication form	Online - E
Action	EGU General Assembly 2019
Event date	07.04.2019 - 12.04.2019
VEvent location	Vienna
Country	AT - Austria
Event type	WRD
Language	eng - English
Country	DE - Germany
Keywords	coronal mass ejections ; interplanetary shock ; geomagnetic storms
Subject RIV	BL - Plasma and Gas Discharge Physics
OECD category	Fluids and plasma physics (including surface physics)
Institutional support	UFA-U - RVO:68378289
Annotation	We have identified 1,068 interplanetary (IP) shocks in data obtained by the Wind spacecraft between 1995 and 2015. We have analyzed four types of shocks: 540 fast forward (FF), 110 fast reverse (FR), 229 slow forward (SF), and 189 slow reverse (SR). While FF shocks occur at the leading edges of CMEs and slow-fast stream interaction regions (SIRs), FR shocks can occur at the trailing edge of the CME ejecta and bounding the rear edge of the SIR. We performed a superposed epoch analysis of the disturbance storm time (Dst) geomagnetic index and 1,068 IP shocks. The Dst index gives information about the strength of the ring current around Earth caused by solar protons and electrons. We found that the Dst minimum for FF shocks is after the shock while for FR shocks it is before the shock. However, we have not observed any correlation between SF/SR shocks and the Dst index. We discuss possible links between IP shock parameters and geomagnetic storms.
Workplace	Institute of Atmospheric Physics
Contact	Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019
Year of Publishing	2020

Number of the records: 1