A Statistical Study of the Properties of, and Geomagnetic Responses to, Large, Rapid Southward Turnings of the Interplanetary Magnetic Field.
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| Title: | A Statistical Study of the Properties of, and Geomagnetic Responses to, Large, Rapid Southward Turnings of the Interplanetary Magnetic Field. |
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| Authors: | Lazzeri, Chiara1 (AUTHOR) chiara.lazzeri.22@ucl.ac.uk, Samsonov, Andrey1 (AUTHOR), Forsyth, Colin1 (AUTHOR), Branduardi‐Raymont, Graziella1 (AUTHOR), Bogdanova, Yulia V.2 (AUTHOR) |
| Source: | Journal of Geophysical Research. Space Physics. Sep2024, Vol. 129 Issue 9, p1-15. 15p. |
| Subject Terms: | *Magnetic storms, Interplanetary magnetic fields, Coronal mass ejections, Dynamic pressure, Wind pressure, Solar wind |
| Abstract: | The interplanetary magnetic field (IMF) north‐south component, Bz, plays a crucial role in the interaction between the solar wind and the Earth's magnetosphere. We analyze 98 intervals in which Bz changed from >3 nT to <−3 nT in 5 min and for which these rapid southward turnings (STs) were surrounded by consistently northward or southward IMF. We separate out events in proximity of interplanetary coronal mass ejections and corotating interaction regions. We find that IMF magnitude, solar wind dynamic pressure and proton density (but also flow speed in ICME‐related events) near the turnings are enhanced above their medians. We analyze the maximum responses of the SML, SMU, SYM‐H, and PCN magnetospheric indices and their timescales, along with the occurrence of geomagnetic phenomena. We find that most STs were followed by either substorms (60.20%) or enhanced convection (37.76%). While SML has similar median minima (∼−460 nT) and timescales (∼56 min) for substorm and convection events, SMU has noticeable differences. STs were followed by geomagnetic storms (SYM‐H ≤ −50 nT) in 46.94% of events within 12 hr, with more storms following ICME‐related turnings. PCN has peaks (median 3.8 mV/m) around 30 min after the turning, and larger ones (median 4.9 mV/m) later. Stronger solar wind driving and magnetospheric responses are observed for ICME‐related events. The correlation between the geomagnetic and solar wind parameters around STs reveals a more direct link between solar wind driving and geomagnetic response for STs than at other times. Key Points: Linear correlation between the geomagnetic response and the preceding solar wind conditions is generally enhanced after southward turnings (STs)The PCN index shows an almost immediate response to STs, reaching a peak with a median timescale of 30 min46.9% of STs were followed by geomagnetic storms (SYM‐H ≤ −50 nT), 60.2% by substorms, and 37.8% by enhanced convection [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 179878114 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A Statistical Study of the Properties of, and Geomagnetic Responses to, Large, Rapid Southward Turnings of the Interplanetary Magnetic Field. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lazzeri%2C+Chiara%22">Lazzeri, Chiara</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chiara.lazzeri.22@ucl.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Samsonov%2C+Andrey%22">Samsonov, Andrey</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Forsyth%2C+Colin%22">Forsyth, Colin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Branduardi‐Raymont%2C+Graziella%22">Branduardi‐Raymont, Graziella</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bogdanova%2C+Yulia+V%2E%22">Bogdanova, Yulia V.</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Space+Physics%22">Journal of Geophysical Research. Space Physics</searchLink>. Sep2024, Vol. 129 Issue 9, p1-15. 15p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Magnetic+storms%22">Magnetic storms</searchLink><br /><searchLink fieldCode="DE" term="%22Interplanetary+magnetic+fields%22">Interplanetary magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Coronal+mass+ejections%22">Coronal mass ejections</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+pressure%22">Dynamic pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Wind+pressure%22">Wind pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+wind%22">Solar wind</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The interplanetary magnetic field (IMF) north‐south component, Bz, plays a crucial role in the interaction between the solar wind and the Earth's magnetosphere. We analyze 98 intervals in which Bz changed from >3 nT to <−3 nT in 5 min and for which these rapid southward turnings (STs) were surrounded by consistently northward or southward IMF. We separate out events in proximity of interplanetary coronal mass ejections and corotating interaction regions. We find that IMF magnitude, solar wind dynamic pressure and proton density (but also flow speed in ICME‐related events) near the turnings are enhanced above their medians. We analyze the maximum responses of the SML, SMU, SYM‐H, and PCN magnetospheric indices and their timescales, along with the occurrence of geomagnetic phenomena. We find that most STs were followed by either substorms (60.20%) or enhanced convection (37.76%). While SML has similar median minima (∼−460 nT) and timescales (∼56 min) for substorm and convection events, SMU has noticeable differences. STs were followed by geomagnetic storms (SYM‐H ≤ −50 nT) in 46.94% of events within 12 hr, with more storms following ICME‐related turnings. PCN has peaks (median 3.8 mV/m) around 30 min after the turning, and larger ones (median 4.9 mV/m) later. Stronger solar wind driving and magnetospheric responses are observed for ICME‐related events. The correlation between the geomagnetic and solar wind parameters around STs reveals a more direct link between solar wind driving and geomagnetic response for STs than at other times. Key Points: Linear correlation between the geomagnetic response and the preceding solar wind conditions is generally enhanced after southward turnings (STs)The PCN index shows an almost immediate response to STs, reaching a peak with a median timescale of 30 min46.9% of STs were followed by geomagnetic storms (SYM‐H ≤ −50 nT), 60.2% by substorms, and 37.8% by enhanced convection [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1029/2023JA032160 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 1 Subjects: – SubjectFull: Magnetic storms Type: general – SubjectFull: Interplanetary magnetic fields Type: general – SubjectFull: Coronal mass ejections Type: general – SubjectFull: Dynamic pressure Type: general – SubjectFull: Wind pressure Type: general – SubjectFull: Solar wind Type: general Titles: – TitleFull: A Statistical Study of the Properties of, and Geomagnetic Responses to, Large, Rapid Southward Turnings of the Interplanetary Magnetic Field. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lazzeri, Chiara – PersonEntity: Name: NameFull: Samsonov, Andrey – PersonEntity: Name: NameFull: Forsyth, Colin – PersonEntity: Name: NameFull: Branduardi‐Raymont, Graziella – PersonEntity: Name: NameFull: Bogdanova, Yulia V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 21699380 Numbering: – Type: volume Value: 129 – Type: issue Value: 9 Titles: – TitleFull: Journal of Geophysical Research. Space Physics Type: main |
| ResultId | 1 |
