Detection of Nonlinear Crustal Movements Using Global Positioning System
The Global Positioning System (GPS) is widely used for measuring crustal movements from varieties of geophysical origins. Nonlinear movement in the observations draws increasing attention owing to the improved measurement precision. We developed an innovative method capable of detecting nonlinear mo...
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ftunivmiamiir:oai:scholarlyrepository.miami.edu:oa_dissertations-1841 2023-05-15T16:29:25+02:00 Detection of Nonlinear Crustal Movements Using Global Positioning System Jiang, Yan Shimon Wdowinski Timothy H. Dixon Falk Amelung Guoqing Lin James L. Davis 2012-08-03T07:00:00Z application/pdf https://scholarlyrepository.miami.edu/oa_dissertations/844 https://scholarlyrepository.miami.edu/cgi/viewcontent.cgi?article=1841&context=oa_dissertations unknown Scholarly Repository Open Access Dissertations GPS Geodesy Geophysics Global Change GIA Slow Slip Earthquake unrestricted 2012 ftunivmiamiir 2018-12-30T17:55:57Z The Global Positioning System (GPS) is widely used for measuring crustal movements from varieties of geophysical origins. Nonlinear movement in the observations draws increasing attention owing to the improved measurement precision. We developed an innovative method capable of detecting nonlinear motion from the observation time series. By implementing this new technique, we identified several nonlinear episodic events in the noisy time series that were ignored previously. Two types of nonlinear motion with different mechanisms were presented in this dissertation. In Greenland, the nonlinear motion is presented by accelerating uplift in the vertical GPS time series. The accelerating uplift of the continental crust is caused by accelerating melting of the ice cap near the stations. Another form of nonlinear motion expressed by the slow slip events usually last for several weeks. The displacements in the time series are caused by slow reverse movement to the plate convergence direction on the subduction fault plane. We identified a series of such events in Costa Rica and modeled the surface displacement data. We conclude that the slow slip events in this area will release seismic energy accumulated on the fault plane in a nondestructive way, thus reduce the seismic hazards in Costa Rica. Other/Unknown Material Greenland Ice cap University of Miami: Scholarly Repository Greenland |
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Open Polar |
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University of Miami: Scholarly Repository |
op_collection_id |
ftunivmiamiir |
language |
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topic |
GPS Geodesy Geophysics Global Change GIA Slow Slip Earthquake |
spellingShingle |
GPS Geodesy Geophysics Global Change GIA Slow Slip Earthquake Jiang, Yan Detection of Nonlinear Crustal Movements Using Global Positioning System |
topic_facet |
GPS Geodesy Geophysics Global Change GIA Slow Slip Earthquake |
description |
The Global Positioning System (GPS) is widely used for measuring crustal movements from varieties of geophysical origins. Nonlinear movement in the observations draws increasing attention owing to the improved measurement precision. We developed an innovative method capable of detecting nonlinear motion from the observation time series. By implementing this new technique, we identified several nonlinear episodic events in the noisy time series that were ignored previously. Two types of nonlinear motion with different mechanisms were presented in this dissertation. In Greenland, the nonlinear motion is presented by accelerating uplift in the vertical GPS time series. The accelerating uplift of the continental crust is caused by accelerating melting of the ice cap near the stations. Another form of nonlinear motion expressed by the slow slip events usually last for several weeks. The displacements in the time series are caused by slow reverse movement to the plate convergence direction on the subduction fault plane. We identified a series of such events in Costa Rica and modeled the surface displacement data. We conclude that the slow slip events in this area will release seismic energy accumulated on the fault plane in a nondestructive way, thus reduce the seismic hazards in Costa Rica. |
author2 |
Shimon Wdowinski Timothy H. Dixon Falk Amelung Guoqing Lin James L. Davis |
format |
Other/Unknown Material |
author |
Jiang, Yan |
author_facet |
Jiang, Yan |
author_sort |
Jiang, Yan |
title |
Detection of Nonlinear Crustal Movements Using Global Positioning System |
title_short |
Detection of Nonlinear Crustal Movements Using Global Positioning System |
title_full |
Detection of Nonlinear Crustal Movements Using Global Positioning System |
title_fullStr |
Detection of Nonlinear Crustal Movements Using Global Positioning System |
title_full_unstemmed |
Detection of Nonlinear Crustal Movements Using Global Positioning System |
title_sort |
detection of nonlinear crustal movements using global positioning system |
publisher |
Scholarly Repository |
publishDate |
2012 |
url |
https://scholarlyrepository.miami.edu/oa_dissertations/844 https://scholarlyrepository.miami.edu/cgi/viewcontent.cgi?article=1841&context=oa_dissertations |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice cap |
genre_facet |
Greenland Ice cap |
op_source |
Open Access Dissertations |
_version_ |
1766019123098157056 |