View in EDS

MMS, Van Allen Probes, GOES 13, and Ground‐Based Magnetometer Observations of EMIC Wave Events Before, During, and After a Modest Interplanetary Shock.

Saved in:
Bibliographic Details
Title: MMS, Van Allen Probes, GOES 13, and Ground‐Based Magnetometer Observations of EMIC Wave Events Before, During, and After a Modest Interplanetary Shock.
Authors: Engebretson, M. J.1 engebret@augsburg.edu, Posch, J. L.1, Capman, N. S. S.1, Campuzano, N. G.1, Bělik, P.1, Allen, R. C.2, Vines, S. K.2, Anderson, B. J.2, Tian, S.3, Cattell, C. A.3, Wygant, J. R.3, Fuselier, S. A.4,5, Argall, M. R.6, Lessard, M. R.6, Torbert, R. B.4,6, Moldwin, M. B.7, Hartinger, M. D.8, Kim, H.9, Russell, C. T.10, Kletzing, C. A.11
Source: Journal of Geophysical Research. Space Physics. Oct2018, Vol. 123 Issue 10, p8331-8357. 27p.
Subject Terms: Magnetic fields, Gravitational waves, Electromagnetism, Magnetosphere, Theory of wave motion
Abstract: The stimulation of electromagnetic ion cyclotron (EMIC) waves by a magnetospheric compression is perhaps the closest thing to a controlled experiment that is currently possible in magnetospheric physics, in that one prominent factor that can increase wave growth acts at a well‐defined time. We present a detailed analysis of EMIC waves observed in the outer dayside magnetosphere by the four Magnetosphere Multiscale (MMS) spacecraft, Van Allen Probe A, and GOES 13 and by four very high latitude ground magnetometer stations in the western hemisphere before, during, and after a modest interplanetary shock on 14 December 2015. Analysis shows several features consistent with current theory, as well as some unexpected features. During the most intense MMS wave burst, which began ~ 1 min after the end of a brief magnetosheath incursion, independent transverse EMIC waves with orthogonal linear polarizations appeared simultaneously at all four spacecraft. He++ band EMIC waves were observed by MMS inside the magnetosphere, whereas almost all previous studies of He++ band EMIC waves observed them only in the magnetosheath and magnetopause boundary layers. Transverse EMIC waves also appeared at Van Allen Probe A and GOES 13 very near the times when the magnetic field compression reached their locations, indicating that the compression lowered the instability threshold to allow for EMIC wave generation throughout the outer dayside magnetosphere. The timing of the EMIC waves at both MMS and Van Allen Probe A was consistent with theoretical expectations for EMIC instabilities based on characteristics of the proton distributions observed by instruments on these spacecraft. Key Points: MMS observed a burst of independent transverse EMIC waves with orthogonal linear polarizations following the shockWave onsets at both MMS and Van Allen Probe A were consistent with theoretical expectations based on particle observationsA rarely observed minimum in wave power at the gyrofrequency of He++ ions was present both before and after the shock [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.)
Database: GreenFILE
FullText Text:
  Availability: 0
Header DbId: 8gh
DbLabel: GreenFILE
An: 133167064
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: MMS, Van Allen Probes, GOES 13, and Ground‐Based Magnetometer Observations of EMIC Wave Events Before, During, and After a Modest Interplanetary Shock.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Engebretson%2C+M%2E+J%2E%22">Engebretson, M. J.</searchLink><relatesTo>1</relatesTo><i> engebret@augsburg.edu</i><br /><searchLink fieldCode="AR" term="%22Posch%2C+J%2E+L%2E%22">Posch, J. L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Capman%2C+N%2E+S%2E+S%2E%22">Capman, N. S. S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Campuzano%2C+N%2E+G%2E%22">Campuzano, N. G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bělik%2C+P%2E%22">Bělik, P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Allen%2C+R%2E+C%2E%22">Allen, R. C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Vines%2C+S%2E+K%2E%22">Vines, S. K.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Anderson%2C+B%2E+J%2E%22">Anderson, B. J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Tian%2C+S%2E%22">Tian, S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Cattell%2C+C%2E+A%2E%22">Cattell, C. A.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Wygant%2C+J%2E+R%2E%22">Wygant, J. R.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Fuselier%2C+S%2E+A%2E%22">Fuselier, S. A.</searchLink><relatesTo>4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Argall%2C+M%2E+R%2E%22">Argall, M. R.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Lessard%2C+M%2E+R%2E%22">Lessard, M. R.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Torbert%2C+R%2E+B%2E%22">Torbert, R. B.</searchLink><relatesTo>4,6</relatesTo><br /><searchLink fieldCode="AR" term="%22Moldwin%2C+M%2E+B%2E%22">Moldwin, M. B.</searchLink><relatesTo>7</relatesTo><br /><searchLink fieldCode="AR" term="%22Hartinger%2C+M%2E+D%2E%22">Hartinger, M. D.</searchLink><relatesTo>8</relatesTo><br /><searchLink fieldCode="AR" term="%22Kim%2C+H%2E%22">Kim, H.</searchLink><relatesTo>9</relatesTo><br /><searchLink fieldCode="AR" term="%22Russell%2C+C%2E+T%2E%22">Russell, C. T.</searchLink><relatesTo>10</relatesTo><br /><searchLink fieldCode="AR" term="%22Kletzing%2C+C%2E+A%2E%22">Kletzing, C. A.</searchLink><relatesTo>11</relatesTo>
– 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>. Oct2018, Vol. 123 Issue 10, p8331-8357. 27p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitational+waves%22">Gravitational waves</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetism%22">Electromagnetism</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetosphere%22">Magnetosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Theory+of+wave+motion%22">Theory of wave motion</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The stimulation of electromagnetic ion cyclotron (EMIC) waves by a magnetospheric compression is perhaps the closest thing to a controlled experiment that is currently possible in magnetospheric physics, in that one prominent factor that can increase wave growth acts at a well‐defined time. We present a detailed analysis of EMIC waves observed in the outer dayside magnetosphere by the four Magnetosphere Multiscale (MMS) spacecraft, Van Allen Probe A, and GOES 13 and by four very high latitude ground magnetometer stations in the western hemisphere before, during, and after a modest interplanetary shock on 14 December 2015. Analysis shows several features consistent with current theory, as well as some unexpected features. During the most intense MMS wave burst, which began ~ 1 min after the end of a brief magnetosheath incursion, independent transverse EMIC waves with orthogonal linear polarizations appeared simultaneously at all four spacecraft. He++ band EMIC waves were observed by MMS inside the magnetosphere, whereas almost all previous studies of He++ band EMIC waves observed them only in the magnetosheath and magnetopause boundary layers. Transverse EMIC waves also appeared at Van Allen Probe A and GOES 13 very near the times when the magnetic field compression reached their locations, indicating that the compression lowered the instability threshold to allow for EMIC wave generation throughout the outer dayside magnetosphere. The timing of the EMIC waves at both MMS and Van Allen Probe A was consistent with theoretical expectations for EMIC instabilities based on characteristics of the proton distributions observed by instruments on these spacecraft. Key Points: MMS observed a burst of independent transverse EMIC waves with orthogonal linear polarizations following the shockWave onsets at both MMS and Van Allen Probe A were consistent with theoretical expectations based on particle observationsA rarely observed minimum in wave power at the gyrofrequency of He++ ions was present both before and after the shock [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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=8gh&AN=133167064
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1029/2018JA025984
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 27
        StartPage: 8331
    Subjects:
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Gravitational waves
        Type: general
      – SubjectFull: Electromagnetism
        Type: general
      – SubjectFull: Magnetosphere
        Type: general
      – SubjectFull: Theory of wave motion
        Type: general
    Titles:
      – TitleFull: MMS, Van Allen Probes, GOES 13, and Ground‐Based Magnetometer Observations of EMIC Wave Events Before, During, and After a Modest Interplanetary Shock.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Engebretson, M. J.
      – PersonEntity:
          Name:
            NameFull: Posch, J. L.
      – PersonEntity:
          Name:
            NameFull: Capman, N. S. S.
      – PersonEntity:
          Name:
            NameFull: Campuzano, N. G.
      – PersonEntity:
          Name:
            NameFull: Bělik, P.
      – PersonEntity:
          Name:
            NameFull: Allen, R. C.
      – PersonEntity:
          Name:
            NameFull: Vines, S. K.
      – PersonEntity:
          Name:
            NameFull: Anderson, B. J.
      – PersonEntity:
          Name:
            NameFull: Tian, S.
      – PersonEntity:
          Name:
            NameFull: Cattell, C. A.
      – PersonEntity:
          Name:
            NameFull: Wygant, J. R.
      – PersonEntity:
          Name:
            NameFull: Fuselier, S. A.
      – PersonEntity:
          Name:
            NameFull: Argall, M. R.
      – PersonEntity:
          Name:
            NameFull: Lessard, M. R.
      – PersonEntity:
          Name:
            NameFull: Torbert, R. B.
      – PersonEntity:
          Name:
            NameFull: Moldwin, M. B.
      – PersonEntity:
          Name:
            NameFull: Hartinger, M. D.
      – PersonEntity:
          Name:
            NameFull: Kim, H.
      – PersonEntity:
          Name:
            NameFull: Russell, C. T.
      – PersonEntity:
          Name:
            NameFull: Kletzing, C. A.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 10
              Text: Oct2018
              Type: published
              Y: 2018
          Identifiers:
            – Type: issn-print
              Value: 21699380
          Numbering:
            – Type: volume
              Value: 123
            – Type: issue
              Value: 10
          Titles:
            – TitleFull: Journal of Geophysical Research. Space Physics
              Type: main
ResultId 1