Evaluation of transient deformation from continuous GPS time series in Western North America (1996-2011) Yehuda Bock1, Brendan W. Crowell 1, Danan Dong.

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Presentation transcript:

Evaluation of transient deformation from continuous GPS time series in Western North America (1996-2011) Yehuda Bock1, Brendan W. Crowell 1, Danan Dong 2, Peng Fang1, Sharon Kedar 2, Zhen Liu 2, Angelyn W. Moore 2, Susan E. Owen 2, Linette M. Prawirodirdjo1, Melinda B. Squibb1, Frank Webb 2 1 Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, CA 2 Jet Propulsion Laboratory, Caltech, Pasadena, CA G53C. New Science Results From the EarthScope Plate Boundary Observatory II AGU Fall Meeting, San Francisco December 9, 2011

Solid Earth Science ESDR System PI’s: Frank Webb (JPL) and Yehuda Bock (SIO) Goal: Support Earth Surface and Interiors (ESI) science goals by providing mature, long-term surface deformation Earth Science Data Records (ESDRs) for understanding earthquakes and the processes that drive tectonic motion Objectives: Deliver verified and validated GPS data products through a portal that facilitates data exploration NASA Contribution to EarthScope Key Innovations: Web portal technology for data exploration Verified and validated high-level surface deformation data sets for studying tectonic motions Workflow that integrates high-level data products with modeling tools

Summary Description of Data & Metadata Hierarchy of Earth Science Data Records GPS Analysis (JPL GIPSY & SOPAC GAMIT) Time Series (Independent, Combined, Precision & Accuracy, Quality Control) Tectonic Deformation – Linear & Transient (Velocities, Coseismic, Postseismic, Strain, Slow slip) Non-Tectonic Effects (Magmatic, Hydrologic, Anthropogenic sources, Structural) Interactive Data Portal – GPS Explorer (Map Interface, Time Series Java Applet, Time Series Modeling Tool, Strain, Transient Deformation)

Data & Metadata Data (RINEX files) archived at SOPAC from > 1800 stations in Western North America including all PBO, SCIGN, BARD and PANGA stations Earliest solutions are from 1992, combination solutions from 1995 Use a common source of metadata to reduce systematic errors – available publically in XML and “IGS log file” formats Processed independently at JPL (GIPSY) and SOPAC (GAMIT) Increase the font size 4

Hierarchy of Earth Science Data Records SOPAC Archive Hierarchy of Earth Science Data Records Larger type 5

Independent SOPAC and JPL analysis SOPAC – cluster approach, divide into global and regional subnetworks and produce loosely constrained GAMIT h- files after ambiguity resolution JPL: Precise Point Positioning and ambiguity resolution, aligned to SOPAC realization of global reference frame (ITRF2005, transitioning to ITRF2008), produce loosely-constrained GIPSY STACOV files

Time Series Data Products & Java Applet (***update) Available Time series: JPL SOPAC Combined JPL & SOPAC PBO Can view: Raw or modeled time series Residuals Unfiltered or filtered April 21, 2018

PCA Analysis (***modify this to describe the PCA and overall procedure that we use)

Significant Earthquakes in Western N.A. (1996-2011 *** complete this table)

Time Series Modeling

Transient Deformation Southern SAF Region

Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm DHLG Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm (CRRS,DHLG,GLRS) GLRS Apr 4, 2010 Mw 7.2 El Mayor-Cucapah Earthquake (209 stations) Jun 15, 2010 Mw 5.7 Ocotillo El Mayor-Cucapah Aftershock (7 stations) Jul 7, 2010 Mw 5.4 Borrego Springs (P484&P490)

Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm DHLG Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm (CRRS,DHLG,GLRS) GLRS Apr 4, 2010 Mw 7.2 El Mayor-Cucapah Earthquake (209 stations) Jun 15, 2010 Mw 5.7 Ocotillo El Mayor-Cucapah Aftershock (7 stations) Jul 7, 2010 Mw 5.4 Borrego Springs (P484&P490)

Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm DHLG Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm (CRRS,DHLG,GLRS) GLRS Apr 4, 2010 Mw 7.2 El Mayor-Cucapah Earthquake (209 stations) Jun 15, 2010 Mw 5.7 Ocotillo El Mayor-Cucapah Aftershock (7 stations) Jul 7, 2010 Mw 5.4 Borrego Springs (P484&P490)

Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm DHLG Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm (CRRS,DHLG,GLRS) GLRS Apr 4, 2010 Mw 7.2 El Mayor-Cucapah Earthquake (209 stations) Jun 15, 2010 Mw 5.7 Ocotillo El Mayor-Cucapah Aftershock (7 stations) Jul 7, 2010 Mw 5.4 Borrego Springs (P484&P490)

DHLG Velocity uncertainty ~ 0.03 mm/yr GLRS RMS ~ 0.8 mm CRRS RMS ~ 1.1 mm Velocity uncertainty ~ 0.04 mm/yr RMS ~ 2.7 mm Velocity uncertainty ~ 0.08 mm/yr

Transient Deformation (Salton Trough 1996-2011) Antenna Change at DHLG ITRF2005 to ITRF2008 transition DHLG GLRS CRRS Oct 16, 1999 Mw 7.1 Hector Mine Earthquake Postseismic: 3-D Exponential Decay 1999-10-16; tau = 182 days Apr 4, 2010 Mw 7.2 El Mayor-Cucapah Earthquake + Postseismic: 3-D Exponential Decay 2010-04-05 tau = 173 days Sep 2, 2005 Mw 5.1 Obsidian Buttes Seismic Swarm

Transient Deformation Central California Sep 28, 2004 Mw 6.0 Parkfield Earthquake (28 stations) Dec 23, 2003 Mw 6.5 San Simeon Earthquake (23 stations)

Transient Deformation Central California (***fill in details)

Transient Deformation Central California

Anomalies (Site POMM near SAF) SOPAC JPL

Comparison (Site HUNT near SAF)

Vertical Deformation: Mendocino Triple Junction (***add slides)

Non-Tectonic Effects (***modify with other examples) LBC1: Oil Extraction CASA: Magma

Subsidence in the Central Valley Los Banos-Kettleman Tulare-Wasco Arvin-Maricopa

Central Valley: Up Residuals

Transient Deformation & Strain Map from Sharon/Robert

Strain evolution (GPS Explorer strain movie)

GPS Explorer Demo (movie here – probably not for this talk)

Access to GPS Explorer http://geoapp03.ucsd.edu/gridsphere/gridsphere 30