Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts
We identified coseismic ionospheric disturbances (CID) in Antarctica generated by the 2010 Maule and the 2011 Tohoku-Oki earthquakes analyzing total electron content (TEC) data with a modified beamforming technique. Beamforming in Antarctica, however, is not straightforward due to the effects of arr...
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Online Access: | https://digitalcommons.memphis.edu/facpubs/1449 https://doi.org/10.1002/2015JA021725 |
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ftunivmemphis:oai:digitalcommons.memphis.edu:facpubs-2448 2024-06-23T07:47:37+00:00 Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts Gõmez, Demián Smalley, Robert Langston, Charles A. Wilson, Terry J. Bevis, Michael Dalziel, Ian W.D. Kendrick, Eric C. Konfal, Stephanie A. 2015-10-01T07:00:00Z https://digitalcommons.memphis.edu/facpubs/1449 https://doi.org/10.1002/2015JA021725 unknown University of Memphis Digital Commons https://digitalcommons.memphis.edu/facpubs/1449 doi:10.1002/2015JA021725 https://doi.org/10.1002/2015JA021725 Faculty Publications Antarctica beamforming coseismic ionospheric disturbances ionosphere total electron content virtual array Geophysics and Seismology text 2015 ftunivmemphis https://doi.org/10.1002/2015JA021725 2024-06-13T23:32:22Z We identified coseismic ionospheric disturbances (CID) in Antarctica generated by the 2010 Maule and the 2011 Tohoku-Oki earthquakes analyzing total electron content (TEC) data with a modified beamforming technique. Beamforming in Antarctica, however, is not straightforward due to the effects of array deformation and atmospheric neutral wave-ionospheric plasma coupling. We take these effects into account and present a method to invert for the seismically generated acoustic wave using TEC observations. The back azimuths, speeds, and waveforms obtained by the beamform are in excellent agreement with the hypothesis that the TEC signals are generated by the passage of Rayleigh waves from the Maule and Tohoku-Oki earthquakes. The Tohoku-Oki earthquake is ~12,500 km from Antarctica, making this the farthest observation of CIDs to date using GPS. Text Antarc* Antarctica South pole South pole University of Memphis Digital Commons South Pole Journal of Geophysical Research: Space Physics 120 10 9087 9101 |
institution |
Open Polar |
collection |
University of Memphis Digital Commons |
op_collection_id |
ftunivmemphis |
language |
unknown |
topic |
Antarctica beamforming coseismic ionospheric disturbances ionosphere total electron content virtual array Geophysics and Seismology |
spellingShingle |
Antarctica beamforming coseismic ionospheric disturbances ionosphere total electron content virtual array Geophysics and Seismology Gõmez, Demián Smalley, Robert Langston, Charles A. Wilson, Terry J. Bevis, Michael Dalziel, Ian W.D. Kendrick, Eric C. Konfal, Stephanie A. Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts |
topic_facet |
Antarctica beamforming coseismic ionospheric disturbances ionosphere total electron content virtual array Geophysics and Seismology |
description |
We identified coseismic ionospheric disturbances (CID) in Antarctica generated by the 2010 Maule and the 2011 Tohoku-Oki earthquakes analyzing total electron content (TEC) data with a modified beamforming technique. Beamforming in Antarctica, however, is not straightforward due to the effects of array deformation and atmospheric neutral wave-ionospheric plasma coupling. We take these effects into account and present a method to invert for the seismically generated acoustic wave using TEC observations. The back azimuths, speeds, and waveforms obtained by the beamform are in excellent agreement with the hypothesis that the TEC signals are generated by the passage of Rayleigh waves from the Maule and Tohoku-Oki earthquakes. The Tohoku-Oki earthquake is ~12,500 km from Antarctica, making this the farthest observation of CIDs to date using GPS. |
format |
Text |
author |
Gõmez, Demián Smalley, Robert Langston, Charles A. Wilson, Terry J. Bevis, Michael Dalziel, Ian W.D. Kendrick, Eric C. Konfal, Stephanie A. |
author_facet |
Gõmez, Demián Smalley, Robert Langston, Charles A. Wilson, Terry J. Bevis, Michael Dalziel, Ian W.D. Kendrick, Eric C. Konfal, Stephanie A. |
author_sort |
Gõmez, Demián |
title |
Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts |
title_short |
Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts |
title_full |
Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts |
title_fullStr |
Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts |
title_full_unstemmed |
Virtual array beamforming of GPS TEC observations of coseismic ionospheric disturbances near the Geomagnetic South Pole triggered by teleseismic megathrusts |
title_sort |
virtual array beamforming of gps tec observations of coseismic ionospheric disturbances near the geomagnetic south pole triggered by teleseismic megathrusts |
publisher |
University of Memphis Digital Commons |
publishDate |
2015 |
url |
https://digitalcommons.memphis.edu/facpubs/1449 https://doi.org/10.1002/2015JA021725 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Antarc* Antarctica South pole South pole |
genre_facet |
Antarc* Antarctica South pole South pole |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.memphis.edu/facpubs/1449 doi:10.1002/2015JA021725 https://doi.org/10.1002/2015JA021725 |
op_doi |
https://doi.org/10.1002/2015JA021725 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
120 |
container_issue |
10 |
container_start_page |
9087 |
op_container_end_page |
9101 |
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1802651753404956672 |