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Simultaneous Observations of Geoelectric and Geomagnetic Fields Produced by Magnetospheric ULF Waves

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dc.contributor.authorHartinger, Michael D.en
dc.contributor.authorShi, X.en
dc.contributor.authorLucas, G. M.en
dc.contributor.authorMurphy, B. S.en
dc.contributor.authorKelbert, A.en
dc.contributor.authorBaker, Joseph B. H.en
dc.contributor.authorRigler, E. J.en
dc.contributor.authorBedrosian, P. A.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2021-02-23T14:14:21Zen
dc.date.available2021-02-23T14:14:21Zen
dc.date.issued2020-09-28en
dc.description.abstractGeomagnetic perturbations (B-GEO) related to magnetospheric ultralow frequency (ULF) waves induce electric fields within the conductive Earth-geoelectric fields (E-GEO)-that in turn drive geomagnetically induced currents. Though numerous past studies have examined ULF waveB(GEO)from a space weather perspective, few studies have linked ULF waves withE(GEO). Using recently available magnetotelluric impedance andE(GEO)measurements in the contiguous United States, we explore the relationship between ULF waves andE(GEO). We use satellite, ground-based radar,B-GEO, andE(GEO)measurements in a case study of a plasmaspheric virtual resonance (PVR), demonstrating that the PVRE(GEO)has significant spatial variation in contrast to a relatively uniformB(GEO), consistent with spatially varying Earth conductivity. We further show ULF waveE(GEO)measurements during two moderate storms of similar to 1 V/km. We use both results to highlight the need for more research characterizing ULF waveE(GEO).en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesM. D. H. and X. S. were supported by NASA 80NSSC19K0907. B. S. M. is supported by a U.S. Geological Survey Mendenhall Postdoctoral Fellowship. We acknowledge NASA Contract NAS5-02099 and V. Angelopoulos for use of data from the THEMIS Mission (http://themis.ssl.berkeley.edu/).Specifically, J. W. Bonnell and F. S. Mozer for use of EFI data; S. Mende and C. T. Russell for use of the GMAG data and NSF for support through Grant AGS-1004814. The EarthScope impedance tensors used in this work were retrieved on 8 July 2019, from the Data Management Center of the Incorporated Research Institutions for Seismology SPUD EMTF database (https://doi.org/10.17611/DP/EMTF/USARRAY/TA Kelbert et al., 2011). USArray MT TA project was led by Principal Investigator Adam Schultz and Gary Egbert. USArray TA was funded through NSF Grant EAR0323311, IRIS Subaward 478 and 489 under NSF Cooperative Agreement EAR0350030 and EAR0323309, IRIS Subaward 75MT under NSF Cooperative Agreement EAR0733069 under CFDA 47.050, and IRIS Subaward 05OSUSAGE under NSF Cooperative Agreement EAR1261681 under CFDA 47.050. The facilities of IRIS Data Services, and specifically the IRIS Data Management Center, were used for access to waveforms, related metadata, and/or derived products used in this study (http://service.iris.edu/irisws/timeseries/1/).IRIS Data Services are funded through the Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation under Cooperative Support Agreement EAR-1851048. The majority of analysis and visualization were completed with the help of free, opensource software tools such as matplotlib (Hunter, 2007), IPython (Perez & Granger, 2007), and pandas (McKinney, 2010). We thank theWorld Data Center for Geomagnetism for use of the IGRF-13 calculator (http://wdc.kugi.kyoto-u.ac.jp/igrf/point/index.html).en
dc.description.sponsorshipNASANational Aeronautics & Space Administration (NASA) [NAS5-02099, 80NSSC19K0907]; U.S. Geological Survey Mendenhall Postdoctoral FellowshipUnited States Geological Survey; NSFNational Science Foundation (NSF) [AGS-1004814, EAR0323311]; IRIS under NSF Cooperative Agreement [478, 489, EAR0350030, EAR0323309, EAR0733069, 75MT, CFDA 47.050, 05OSUSAGE, EAR1261681]; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation [EAR-1851048]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1029/2020GL089441en
dc.identifier.eissn1944-8007en
dc.identifier.issn0094-8276en
dc.identifier.issue18en
dc.identifier.othere2020GL089441en
dc.identifier.urihttp://hdl.handle.net/10919/102429en
dc.identifier.volume47en
dc.language.isoenen
dc.rightsPublic Domainen
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectULF waveen
dc.subjectgeoelectric fielden
dc.subjectgeomagnetic fielden
dc.subjectvirtual resonanceen
dc.subjectgeomagnetically induced currenten
dc.subjectmagnetotelluricsen
dc.titleSimultaneous Observations of Geoelectric and Geomagnetic Fields Produced by Magnetospheric ULF Wavesen
dc.title.serialGeophysical Research Lettersen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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