Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event
Abstract
Recent results by the Van Allen Probes mission showed that the occurrence of energetic ion injections inside geosynchronous orbit could be very frequent throughout the main phase of a geomagnetic storm. Understanding, therefore, the formation and evolution of energetic particle injections is critical in order to quantify their effect in the inner magnetosphere. We present a case study of a substorm event that occurred during a weak storm (Dst ~ –40 nT) on 14 July 2013. Van Allen Probe B, inside geosynchronous orbit, observed two energetic proton injections within 10 min, with different dipolarization signatures and duration. The first one is a dispersionless, short-timescale injection pulse accompanied by a sharp dipolarization signature, while the second one is a dispersed, longer-timescale injection pulse accompanied by a gradual dipolarization signature. We combined ground magnetometer data from various stations and in situ particle and magnetic field data from multiple satellites in the inner magnetosphere and near-Earth plasma sheet to determine the spatial extent of these injections, their temporal evolution, and their effects in the inner magnetosphere. Our results indicate that there are different spatial and temporal scales at which injections can occur in the inner magnetosphere and depict the necessity of multipoint observationsmore »
- Authors:
-
- Johns Hopkins University Applied Physics Laboratory, Laurel, MD (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- The Aerospace Corporation, El Segundo, CA (United States). Space Sciences Department.
- Kyoto Univ., Kyoto (Japan). Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science.
- Japan Aerospace Exploration Agency, Tsukuba (Japan)
- Univ. of Colorado, Boulder, CO (United States). Cooperative Institute for Research in Environmental Sciences; National Oceanic and Atmospheric Administration, Boulder, CO (United States). National Geophysical Data Center.
- New Jersey Institute of Technology, Newark, NJ (United States). Center for Solar-Terrestrial Research.
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1212463
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Space Physics
- Additional Journal Information:
- Journal Volume: 120; Journal Issue: 3; Journal ID: ISSN 2169-9380
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES
Citation Formats
Gkioulidou, Matina, Ohtani, S., Mitchell, D. G., Ukhorskiy, A. Y., Reeves, G. D., Turner, D. L., Gjerloev, J. W., Nosé, M., Koga, K., Rodriguez, J. V., and Lanzerotti, L. J. Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event. United States: N. p., 2015.
Web. doi:10.1002/2014JA020872.
Gkioulidou, Matina, Ohtani, S., Mitchell, D. G., Ukhorskiy, A. Y., Reeves, G. D., Turner, D. L., Gjerloev, J. W., Nosé, M., Koga, K., Rodriguez, J. V., & Lanzerotti, L. J. Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event. United States. https://doi.org/10.1002/2014JA020872
Gkioulidou, Matina, Ohtani, S., Mitchell, D. G., Ukhorskiy, A. Y., Reeves, G. D., Turner, D. L., Gjerloev, J. W., Nosé, M., Koga, K., Rodriguez, J. V., and Lanzerotti, L. J. Fri .
"Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event". United States. https://doi.org/10.1002/2014JA020872. https://www.osti.gov/servlets/purl/1212463.
@article{osti_1212463,
title = {Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event},
author = {Gkioulidou, Matina and Ohtani, S. and Mitchell, D. G. and Ukhorskiy, A. Y. and Reeves, G. D. and Turner, D. L. and Gjerloev, J. W. and Nosé, M. and Koga, K. and Rodriguez, J. V. and Lanzerotti, L. J.},
abstractNote = {Recent results by the Van Allen Probes mission showed that the occurrence of energetic ion injections inside geosynchronous orbit could be very frequent throughout the main phase of a geomagnetic storm. Understanding, therefore, the formation and evolution of energetic particle injections is critical in order to quantify their effect in the inner magnetosphere. We present a case study of a substorm event that occurred during a weak storm (Dst ~ –40 nT) on 14 July 2013. Van Allen Probe B, inside geosynchronous orbit, observed two energetic proton injections within 10 min, with different dipolarization signatures and duration. The first one is a dispersionless, short-timescale injection pulse accompanied by a sharp dipolarization signature, while the second one is a dispersed, longer-timescale injection pulse accompanied by a gradual dipolarization signature. We combined ground magnetometer data from various stations and in situ particle and magnetic field data from multiple satellites in the inner magnetosphere and near-Earth plasma sheet to determine the spatial extent of these injections, their temporal evolution, and their effects in the inner magnetosphere. Our results indicate that there are different spatial and temporal scales at which injections can occur in the inner magnetosphere and depict the necessity of multipoint observations of both particle and magnetic field data in order to determine these scales.},
doi = {10.1002/2014JA020872},
journal = {Journal of Geophysical Research. Space Physics},
number = 3,
volume = 120,
place = {United States},
year = {Fri Mar 20 00:00:00 EDT 2015},
month = {Fri Mar 20 00:00:00 EDT 2015}
}
Web of Science
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