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Cross-scale observations of the 2015 St. Patrick's day storm: THEMIS, Van Allen Probes, and TWINS


Metadata FieldValueLanguage
dc.contributorJ. D. Perez, perezjd@auburn.eduen_US
dc.creatorGoldstein, J.
dc.creatorPerez, J. D.
dc.creatorWygant, J. R.
dc.date.accessioned2020-06-01T18:38:55Z
dc.date.available2020-06-01T18:38:55Z
dc.date.created2017
dc.identifier10.1002/2016JA023173en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JA023173en_US
dc.identifier.urihttp://hdl.handle.net/11200/49837
dc.description.abstractWe present cross-scale magnetospheric observations of the 17 March 2015 (St. Patrick's Day) storm, by Time History of Events and Macroscale Interactions during Substorms (THEMIS), Van Allen Probes (Radiation Belt Storm Probes), and Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS), plus upstream ACE/Wind solar wind data. THEMIS crossed the bow shock or magnetopause 22 times and observed the magnetospheric compression that initiated the storm. Empirical models reproduce these boundary locations within 0.7 R-E. Van Allen Probes crossed the plasmapause 13 times; test particle simulations reproduce these encounters within 0.5 R-E. Before the storm, Van Allen Probes measured quiet double-nose proton spectra in the region of corotating cold plasma. About 15 min after a 0605 UT dayside southward turning, Van Allen Probes captured the onset of inner magnetospheric convection, as a density decrease at the moving corotation-convection boundary (CCB) and a steep increase in ring current (RC) proton flux. During the first several hours of the storm, Van Allen Probes measured highly dynamic ion signatures (numerous injections and multiple spectral peaks). Sustained convection after similar to 1200 UT initiated a major buildup of the midnight-sector ring current (measured by RBSPA), with much weaker duskside fluxes (measured by RBSPB, THEMISa and THEMIS d). A close conjunction of THEMISd, RBSPA, and TWINS1 at 1631 UT shows good three-way agreement in the shapes of two-peak spectra from the center of the partial RC. A midstorm injection, observed by Van Allen Probes and TWINS at 1740 UT, brought in fresh ions with lower average energies (leading to globally less energetic spectra in precipitating ions) but increased the total pressure. The cross-scale measurements of 17March 2015 contain significant spatial, spectral, and temporal structure.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries2169-9380en_US
dc.subjectRING CURRENT PARTICLES; INNER MAGNETOSPHERE; PLASMA INSTRUMENT; NOSE STRUCTURES; CURRENT IONS; IN-SITU; IONOSPHERE; CLUSTER; FIELDen_US
dc.titleCross-scale observations of the 2015 St. Patrick's day storm: THEMIS, Van Allen Probes, and TWINSen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume122en_US
dc.citation.issue1en_US
dc.citation.spage3682en_US
dc.citation.epage392en_US
dc.description.statusPublisheden_US
dc.creator.orcid0000-0002-5619-9093en_US

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