Auxiliary Material Submission for Paper 2013JB010442
Change of Apparent Segmentation of the San Andreas Fault Around Parkfield from Space Geodetic Observations Across Multiple Periods.
Sylvain Barbot, Piyush Agram and Marcello De Michele 
(Earth Observatory of Singapore, Nanyang Technological University, Singapore;
California Institute of Technology, 1200 E California Blvd, California, USA;
Bureau de Recherche Geologique et Miniere, France) 

Introduction 

Auxiliary material describes 1) time/baseline plots for InSAR data, 2) forwardd models and residuals for baseline GPS inversions, and 3) resolution of fault slip inversions, all supplementary figures are in [cholame-supp.pdf].

A1 - Time vs. perpendicular baseline plot for ERS/ ENVISAT data, track 27, frame 2871; ENVISAT data, track 435, frame 711; ALOS ascending data, track 220, frame 710; ALOS ascending data, track 219, frame 700; ENVISAT track 256, frame 2889. See Fig. 1 for the surface footprint. See Figure 1 for surface footprint of SAR data.

A2 - Absolute and baseline velocity field at the EarthScope Plate Boundary Observatory (PBO) network. A) Baseline velocity and forward model; B) residual baseline velocity. The relative velocity between two stations X and Y is represented by a vector starting in the middle of the baseline. A line connects station X and the velocity vector. C) Velocity and forward model; D) residual velocity. The velocity is relative to the SAF and the residual ITRF velocity is shown for reference.

A3 - Absolute and baseline velocity field at the Bay Area Velocity Unification (BAVU) network [dÕAlessio et al., 2005]. A) Baseline velocity and forward model; B) residual baseline velocity. The relative velocity between two stations X and Y is represented by a vector starting in the middle of the baseline. A line connects station X and the velocity vector. C) Velocity and forward model; D) residual velocity. The velocity is relative to the SAF and the residual ITRF velocity is shown for reference.

A4 - Absolute and baseline GPS velocity field at the SCEC Crustal Motion Map 4 (CMM4) compilation network [Shen et al., 2011]. A) Baseline velocity and forward model; B) residual baseline velocity. The relative velocity between two stations X and Y is represented by a vector starting in the middle of the baseline. A line connects station X and the velocity vector. C) Velocity and forward model; D) residual velocity. The velocity is relative to the SAF and the best-fit velocity of the stable North American Plate in the ITRF reference frame is shown for reference.

A5 - Resolution of the joint inversion of InSAR and GPS data for the 1992-2004 period using GPS data from the BAVU and PBO networks and InSAR data from the ALOS, ERS and ENVISAT satellites.

A6 - Pre-earthquake slip velocity distribution. The three-dimensional view can be found in Fig. 7.

A7 - Baseline and absolute velocity fields at the PBO network in the 2006-2012 period. A) Baseline velocity and forward model; B) residual baseline velocity. The relative velocity between two stations X and Y is represented by a vector starting in the middle of the baseline. X line connects station X and the velocity vector. C) Velocity and forward model; D) residual velocity. The velocity is relative to the SAF and the residual ITRF velocity is shown for reference.

A8 - Resolution of the joint inversion of InSAR (ENVISAT and ALOS satellites) and GPS (PBO network) data for the 2006-2012 period. The improved coverage above the creeping segment allows us to refine fault sampling at this location, compared to the other period considered.

A9 - Post-earthquake slip velocity distribution. The three-dimensional view can be found in Fig. 10.