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Article: Unusual Location of the Geotail Magnetopause Near Lunar Orbit: A Case Study

TitleUnusual Location of the Geotail Magnetopause Near Lunar Orbit: A Case Study
Authors
Keywordsfull moon time
geotail
large scale deflection
magnetopause
solar wind Vy
windsock
Issue Date2020
Citation
Journal of Geophysical Research: Space Physics, 2020, v. 125, n. 4, article no. e2019JA027401 How to Cite?
AbstractThe Earth's magnetopause is highly variable in location and shape and is modulated by solar wind conditions. On 8 March 2012, the ARTEMIS probes were located near the tail current sheet when an interplanetary shock arrived under northward interplanetary magnetic field conditions and recorded an abrupt tail compression at ∼(-60, 0, -5) RE in Geocentric Solar Ecliptic coordinate in the deep magnetotail. Approximately 10 minutes later, the probes crossed the magnetopause many times within an hour after the oblique interplanetary shock passed by. The solar wind velocity vector downstream from the shock was not directed along the Sun-Earth line but had a significant Y component. We propose that the compressed tail was pushed aside by the appreciable solar wind flow in the Y direction. Using a virtual spacecraft in a global magnetohydrodynamic (MHD) simulation, we reproduce the sequence of magnetopause crossings in the X-Y plane observed by ARTEMIS under oblique shock conditions, demonstrating that the compressed magnetopause is sharply deflected at lunar distances in response to the shock and solar wind VY effects. The results from two different global MHD simulations show that the shocked magnetotail at lunar distances is mainly controlled by the solar wind direction with a timescale of about a quarter hour, which appears to be consistent with the windsock effect. The results also provide some references for investigating interactions between the solar wind/magnetosheath and lunar nearside surface during full moon time intervals, which should not happen in general.
Persistent Identifierhttp://hdl.handle.net/10722/334655
ISSN
2023 Impact Factor: 2.6
2023 SCImago Journal Rankings: 0.845
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShang, W. S.-
dc.contributor.authorTang, B. B.-
dc.contributor.authorShi, Q. Q.-
dc.contributor.authorTian, A. M.-
dc.contributor.authorZhou, X. Y.-
dc.contributor.authorYao, Z. H.-
dc.contributor.authorDegeling, A. W.-
dc.contributor.authorRae, I. J.-
dc.contributor.authorFu, S. Y.-
dc.contributor.authorLu, J. Y.-
dc.contributor.authorPu, Z. Y.-
dc.contributor.authorFazakerley, A. N.-
dc.contributor.authorDunlop, M. W.-
dc.contributor.authorFacskó, G.-
dc.contributor.authorLiu, J.-
dc.contributor.authorWang, M.-
dc.date.accessioned2023-10-20T06:49:42Z-
dc.date.available2023-10-20T06:49:42Z-
dc.date.issued2020-
dc.identifier.citationJournal of Geophysical Research: Space Physics, 2020, v. 125, n. 4, article no. e2019JA027401-
dc.identifier.issn2169-9380-
dc.identifier.urihttp://hdl.handle.net/10722/334655-
dc.description.abstractThe Earth's magnetopause is highly variable in location and shape and is modulated by solar wind conditions. On 8 March 2012, the ARTEMIS probes were located near the tail current sheet when an interplanetary shock arrived under northward interplanetary magnetic field conditions and recorded an abrupt tail compression at ∼(-60, 0, -5) RE in Geocentric Solar Ecliptic coordinate in the deep magnetotail. Approximately 10 minutes later, the probes crossed the magnetopause many times within an hour after the oblique interplanetary shock passed by. The solar wind velocity vector downstream from the shock was not directed along the Sun-Earth line but had a significant Y component. We propose that the compressed tail was pushed aside by the appreciable solar wind flow in the Y direction. Using a virtual spacecraft in a global magnetohydrodynamic (MHD) simulation, we reproduce the sequence of magnetopause crossings in the X-Y plane observed by ARTEMIS under oblique shock conditions, demonstrating that the compressed magnetopause is sharply deflected at lunar distances in response to the shock and solar wind VY effects. The results from two different global MHD simulations show that the shocked magnetotail at lunar distances is mainly controlled by the solar wind direction with a timescale of about a quarter hour, which appears to be consistent with the windsock effect. The results also provide some references for investigating interactions between the solar wind/magnetosheath and lunar nearside surface during full moon time intervals, which should not happen in general.-
dc.languageeng-
dc.relation.ispartofJournal of Geophysical Research: Space Physics-
dc.subjectfull moon time-
dc.subjectgeotail-
dc.subjectlarge scale deflection-
dc.subjectmagnetopause-
dc.subjectsolar wind Vy-
dc.subjectwindsock-
dc.titleUnusual Location of the Geotail Magnetopause Near Lunar Orbit: A Case Study-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1029/2019JA027401-
dc.identifier.scopuseid_2-s2.0-85083956499-
dc.identifier.volume125-
dc.identifier.issue4-
dc.identifier.spagearticle no. e2019JA027401-
dc.identifier.epagearticle no. e2019JA027401-
dc.identifier.eissn2169-9402-
dc.identifier.isiWOS:000536831100012-

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