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Title: Multipoint Observations of Energetic Particle Injections and Substorm Activity During a Conjunction Between Magnetospheric Multiscale (MMS) and Van Allen Probes

Abstract

Here, this study examines multipoint observations during a conjunction between Magnetospheric Multiscale (MMS) and Van Allen Probes on 7 April 2016 in which a series of energetic particle injections occurred. With complementary data from Time History of Events and Macroscale Interactions during Substorms, Geotail, and Los Alamos National Laboratory spacecraft in geosynchronous orbit (16 spacecraft in total), we develop new insights on the nature of energetic particle injections associated with substorm activity. Despite this case involving only weak substorm activity (maximum AE <300 nT) during quiet geomagnetic conditions in steady, below-average solar wind, a complex series of at least six different electron injections was observed throughout the system. Intriguingly, only one corresponding ion injection was clearly observed. All ion and electron injections were observed at <600 keV only. MMS reveals detailed substructure within the largest electron injection. A relationship between injected electrons with energy <60 keV and enhanced whistler mode chorus wave activity is also established from Van Allen Probes and MMS. Drift mapping using a simplified magnetic field model provides estimates of the dispersionless injection boundary locations as a function of universal time, magnetic local time, and L shell. The analysis reveals that at least five electron injections, whichmore » were localized in magnetic local time, preceded a larger injection of both electrons and ions across nearly the entire nightside of the magnetosphere near geosynchronous orbit. The larger ion and electron injection did not penetrate to L < 6.6, but several of the smaller electron injections penetrated to L < 6.6. Due to the discrepancy between the number, penetration depth, and complexity of electron versus ion injections, this event presents challenges to the current conceptual models of energetic particle injections.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3];  [3]; ORCiD logo [3]; ORCiD logo [4];  [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [9] more »; ORCiD logo [10] « less
  1. The Aerospace Corp., El Segundo, CA (United States)
  2. Univ. of Colorado, Boulder, CO (United States)
  3. Johns Hopkins Univ. Applied Physics Lab, Laurel, MD (United States)
  4. Univ. of California, Los Angeles, CA (United States)
  5. Univ. of Iowa, Iowa City, IA (United States)
  6. CNRS/Ecole Polytechnique/UPMC Univ. Paris 06/Univ. Paris-Sud/Observatoire de Paris, Paris (France)
  7. Univ. of New Hampshire, Durham, NH (United States)
  8. Univ. of New Hampshire, Durham, NH (United States); Southwest Research Institute, San Antonio, TX (United States)
  9. Southwest Research Institute, San Antonio, TX (United States)
  10. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
National Aeronautics and Space Administration (NASA); USDOE
OSTI Identifier:
1417178
Report Number(s):
LA-UR-17-31431
Journal ID: ISSN 2169-9380; TRN: US1801007
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 11; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Heliospheric and Magnetospheric Physics

Citation Formats

Turner, Drew L., Fennell, J. F., Blake, J. B., Claudepierre, S. G., Clemmons, J. H., Jaynes, A. N., Leonard, T., Baker, D. N., Cohen, I. J., Gkioulidou, M., Ukhorskiy, A. Y., Mauk, B. H., Gabrielse, C., Angelopoulos, V., Strangeway, R. J., Kletzing, C. A., Le Contel, O., Spence, H. E., Torbert, R. B., Burch, J. L., and Reeves, Geoffrey D. Multipoint Observations of Energetic Particle Injections and Substorm Activity During a Conjunction Between Magnetospheric Multiscale (MMS) and Van Allen Probes. United States: N. p., 2017. Web. doi:10.1002/2017JA024554.
Turner, Drew L., Fennell, J. F., Blake, J. B., Claudepierre, S. G., Clemmons, J. H., Jaynes, A. N., Leonard, T., Baker, D. N., Cohen, I. J., Gkioulidou, M., Ukhorskiy, A. Y., Mauk, B. H., Gabrielse, C., Angelopoulos, V., Strangeway, R. J., Kletzing, C. A., Le Contel, O., Spence, H. E., Torbert, R. B., Burch, J. L., & Reeves, Geoffrey D. Multipoint Observations of Energetic Particle Injections and Substorm Activity During a Conjunction Between Magnetospheric Multiscale (MMS) and Van Allen Probes. United States. https://doi.org/10.1002/2017JA024554
Turner, Drew L., Fennell, J. F., Blake, J. B., Claudepierre, S. G., Clemmons, J. H., Jaynes, A. N., Leonard, T., Baker, D. N., Cohen, I. J., Gkioulidou, M., Ukhorskiy, A. Y., Mauk, B. H., Gabrielse, C., Angelopoulos, V., Strangeway, R. J., Kletzing, C. A., Le Contel, O., Spence, H. E., Torbert, R. B., Burch, J. L., and Reeves, Geoffrey D. Mon . "Multipoint Observations of Energetic Particle Injections and Substorm Activity During a Conjunction Between Magnetospheric Multiscale (MMS) and Van Allen Probes". United States. https://doi.org/10.1002/2017JA024554. https://www.osti.gov/servlets/purl/1417178.
@article{osti_1417178,
title = {Multipoint Observations of Energetic Particle Injections and Substorm Activity During a Conjunction Between Magnetospheric Multiscale (MMS) and Van Allen Probes},
author = {Turner, Drew L. and Fennell, J. F. and Blake, J. B. and Claudepierre, S. G. and Clemmons, J. H. and Jaynes, A. N. and Leonard, T. and Baker, D. N. and Cohen, I. J. and Gkioulidou, M. and Ukhorskiy, A. Y. and Mauk, B. H. and Gabrielse, C. and Angelopoulos, V. and Strangeway, R. J. and Kletzing, C. A. and Le Contel, O. and Spence, H. E. and Torbert, R. B. and Burch, J. L. and Reeves, Geoffrey D.},
abstractNote = {Here, this study examines multipoint observations during a conjunction between Magnetospheric Multiscale (MMS) and Van Allen Probes on 7 April 2016 in which a series of energetic particle injections occurred. With complementary data from Time History of Events and Macroscale Interactions during Substorms, Geotail, and Los Alamos National Laboratory spacecraft in geosynchronous orbit (16 spacecraft in total), we develop new insights on the nature of energetic particle injections associated with substorm activity. Despite this case involving only weak substorm activity (maximum AE <300 nT) during quiet geomagnetic conditions in steady, below-average solar wind, a complex series of at least six different electron injections was observed throughout the system. Intriguingly, only one corresponding ion injection was clearly observed. All ion and electron injections were observed at <600 keV only. MMS reveals detailed substructure within the largest electron injection. A relationship between injected electrons with energy <60 keV and enhanced whistler mode chorus wave activity is also established from Van Allen Probes and MMS. Drift mapping using a simplified magnetic field model provides estimates of the dispersionless injection boundary locations as a function of universal time, magnetic local time, and L shell. The analysis reveals that at least five electron injections, which were localized in magnetic local time, preceded a larger injection of both electrons and ions across nearly the entire nightside of the magnetosphere near geosynchronous orbit. The larger ion and electron injection did not penetrate to L < 6.6, but several of the smaller electron injections penetrated to L < 6.6. Due to the discrepancy between the number, penetration depth, and complexity of electron versus ion injections, this event presents challenges to the current conceptual models of energetic particle injections.},
doi = {10.1002/2017JA024554},
journal = {Journal of Geophysical Research. Space Physics},
number = 11,
volume = 122,
place = {United States},
year = {Mon Sep 25 00:00:00 EDT 2017},
month = {Mon Sep 25 00:00:00 EDT 2017}
}

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journal, January 2006

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Entropy and plasma sheet transport: ENTROPY AND PLASMA SHEET TRANSPORT
journal, May 2009

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RCM-E simulation of ion acceleration during an idealized plasma sheet bubble injection: BUBBLE INJECTION
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Works referencing / citing this record:

Explosive Magnetotail Activity
journal, May 2019

  • Sitnov, Mikhail; Birn, Joachim; Ferdousi, Banafsheh
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Drift‐Dispersed Flux Dropouts of Energetic Electrons Observed in Earth's Middle Magnetosphere by the Magnetospheric Multiscale (MMS) Mission
journal, March 2019

  • Cohen, Ian J.; Mauk, Barry H.; Turner, Drew L.
  • Geophysical Research Letters, Vol. 46, Issue 6
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  • Sandhu, J. K.; Rae, I. J.; Freeman, M. P.
  • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 8
  • DOI: 10.1029/2019ja026766

Contribution of Bursty Bulk Flows to the Global Dipolarization of the Magnetotail During an Isolated Substorm
journal, November 2019

  • Merkin, V. G.; Panov, E. V.; Sorathia, K. A.
  • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 11
  • DOI: 10.1029/2019ja026872

Understanding Electron Dropout Echoes Induced by Interplanetary Shocks: Test Particle Simulations
journal, August 2019

  • Liu, Y.; Zong, Q. ‐G.; Zhou, X. ‐Z.
  • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 8
  • DOI: 10.1029/2019ja027018

Eastward Propagating Second Harmonic Poloidal Waves Triggered by Temporary Outward Gradient of Proton Phase Space Density: Van Allen Probe A Observation
journal, December 2019

  • Yamamoto, K.; Nosé, M.; Keika, K.
  • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 12
  • DOI: 10.1029/2019ja027158

Drifting Electron Holes Occurring During Geomagnetically Quiet Times: BD‐IES Observations
journal, November 2019

  • Liu, Z. ‐Y.; Zong, Q. ‐G.; Zou, H.
  • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 11
  • DOI: 10.1029/2019ja027194