Simultaneous Occurrence of Magnetospheric Fluctuations at Different Discrete Frequencies (f≈ 1 – 5 mHz): A Review.
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| Title: | Simultaneous Occurrence of Magnetospheric Fluctuations at Different Discrete Frequencies (f≈ 1 – 5 mHz): A Review. |
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| Authors: | Di Matteo, Simone1,2 (AUTHOR) simone.dimatteo@nasa.gov, Villante, Umberto3,4 (AUTHOR) umberto.villante@aquila.infn.it |
| Source: | Space Science Reviews. Jun2025, Vol. 221 Issue 4, p1-58. 58p. |
| Subjects: | Magnetospheric physics, Solar wind, Geomagnetism, Ionospheric plasma, Frequency standards, Inquiry (Theory of knowledge), Time-frequency analysis, Power spectra |
| Abstract: | In the last 30 years, many papers reported the almost simultaneous occurrence of magnetospheric fluctuations at different frequencies and latitudes (basically, in the range f ≈ 1–5 mHz; T ≈ 200–1000 s) and the possible existence and stability of sets of favorite frequencies (in particular: f ≈ 1 1.3, f ≈ 2 1.9, f ≈ 3 2.6–2.7, and f ≈ 4 3.2–3.4 mHz) has been proposed, determining controversial results. In the present paper we review these investigations focusing particular attention on several critical aspects that may have influenced the results and the comparison of these analyses (particularly, the correspondence between magnetospheric and solar wind fluctuations; the role of the short and long term variations of the solar wind and magnetospheric characteristics; the effects of the great variety of analytical methods adopted for the evaluation of power spectra and for the identification of relevant events). The results of this global analysis do not support the existence of a stable and persistent absolute set of favorite frequencies for magnetospheric oscillations; nevertheless, in the range of frequency explored by most investigations (f ≈ 1.5–4.0 mHz), they reveal a strong predominance of cases between f ≈ 1.5–2.5 mHz, with percentages maximizing in the bin centered at f = 2.0 mHz (a feature mostly due to events occurring at f ≈ 1.9 mHz) and rapidly decreasing with increasing frequency; small evidence for an additional peak emerges at f = 3.5 mHz; these aspects are much more explicit in the geomagnetic events than in the ionospheric and magnetospheric ones. Among other processes, the impact of the "mesoscale" solar wind density structures on the magnetosphere might be related with the onset of magnetospheric fluctuations at the observed frequencies. [ABSTRACT FROM AUTHOR] |
| Copyright of Space Science Reviews is the property of Springer Nature 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: egs DbLabel: Engineering Source An: 185782406 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Simultaneous Occurrence of Magnetospheric Fluctuations at Different Discrete Frequencies (f≈ 1 – 5 mHz): A Review. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Di Matteo%2C+Simone%22">Di Matteo, Simone</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> simone.dimatteo@nasa.gov</i><br /><searchLink fieldCode="AR" term="%22Villante%2C+Umberto%22">Villante, Umberto</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<i> umberto.villante@aquila.infn.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Space+Science+Reviews%22">Space Science Reviews</searchLink>. Jun2025, Vol. 221 Issue 4, p1-58. 58p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Magnetospheric+physics%22">Magnetospheric physics</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+wind%22">Solar wind</searchLink><br /><searchLink fieldCode="DE" term="%22Geomagnetism%22">Geomagnetism</searchLink><br /><searchLink fieldCode="DE" term="%22Ionospheric+plasma%22">Ionospheric plasma</searchLink><br /><searchLink fieldCode="DE" term="%22Frequency+standards%22">Frequency standards</searchLink><br /><searchLink fieldCode="DE" term="%22Inquiry+%28Theory+of+knowledge%29%22">Inquiry (Theory of knowledge)</searchLink><br /><searchLink fieldCode="DE" term="%22Time-frequency+analysis%22">Time-frequency analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Power+spectra%22">Power spectra</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In the last 30 years, many papers reported the almost simultaneous occurrence of magnetospheric fluctuations at different frequencies and latitudes (basically, in the range f ≈ 1–5 mHz; T ≈ 200–1000 s) and the possible existence and stability of sets of favorite frequencies (in particular: f ≈ 1 1.3, f ≈ 2 1.9, f ≈ 3 2.6–2.7, and f ≈ 4 3.2–3.4 mHz) has been proposed, determining controversial results. In the present paper we review these investigations focusing particular attention on several critical aspects that may have influenced the results and the comparison of these analyses (particularly, the correspondence between magnetospheric and solar wind fluctuations; the role of the short and long term variations of the solar wind and magnetospheric characteristics; the effects of the great variety of analytical methods adopted for the evaluation of power spectra and for the identification of relevant events). The results of this global analysis do not support the existence of a stable and persistent absolute set of favorite frequencies for magnetospheric oscillations; nevertheless, in the range of frequency explored by most investigations (f ≈ 1.5–4.0 mHz), they reveal a strong predominance of cases between f ≈ 1.5–2.5 mHz, with percentages maximizing in the bin centered at f = 2.0 mHz (a feature mostly due to events occurring at f ≈ 1.9 mHz) and rapidly decreasing with increasing frequency; small evidence for an additional peak emerges at f = 3.5 mHz; these aspects are much more explicit in the geomagnetic events than in the ionospheric and magnetospheric ones. Among other processes, the impact of the "mesoscale" solar wind density structures on the magnetosphere might be related with the onset of magnetospheric fluctuations at the observed frequencies. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Space Science Reviews is the property of Springer Nature 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: 10.1007/s11214-025-01166-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 58 StartPage: 1 Subjects: – SubjectFull: Magnetospheric physics Type: general – SubjectFull: Solar wind Type: general – SubjectFull: Geomagnetism Type: general – SubjectFull: Ionospheric plasma Type: general – SubjectFull: Frequency standards Type: general – SubjectFull: Inquiry (Theory of knowledge) Type: general – SubjectFull: Time-frequency analysis Type: general – SubjectFull: Power spectra Type: general Titles: – TitleFull: Simultaneous Occurrence of Magnetospheric Fluctuations at Different Discrete Frequencies (f≈ 1 – 5 mHz): A Review. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Di Matteo, Simone – PersonEntity: Name: NameFull: Villante, Umberto IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00386308 Numbering: – Type: volume Value: 221 – Type: issue Value: 4 Titles: – TitleFull: Space Science Reviews Type: main |
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