1. New InSAR results from North America by the WInSAR consortium
Matt Pritchard
Cornell University
With assistance from:
Falk Amelung, Yuri Fialko, Chuck Wicks, Noah Finnegan, Rowena Lohman, Isabelle Ryder, Dave Sandwell, UNAVCO, and with the help of many others
1) Why WInSAR?
2) Some recent results*:
Yellowstone magmatic activity
Creep on the San Andreas Fault
Deformation in the Seattle area
* An incomplete list! These are just recent results people sent me

2. WInSAR Background Consortium of universities and research laboratories
Facilitates collaboration in, and advancement of, Earth science research using interferometric radar remote sensing
coordinate requests for data
simplifying interactions with data providers
interface with government agencies (NASA, NSF, USGS)
No review or funding of research
Encourages and promotes reproduction, verification, and extension of scientific results.

3. Western North American InSAR (WInSAR) data consortium
43 U.S. Member Institutions
Arizona State
Caltech
Central Washington Cornell
Georgia Tech
George Mason U.
Idaho State
Indiana U.
JPL LLNL
LANL
U. Missouri-Columbia
U. Nevada-Reno
U. Kansas
U. Oregon
USC
U. Texas-Austin
U. Utah
U. Wisconsin
USGS
Western Michigan
Western Washington
WHOI
MIT
Ohio State
Oregon State
Purdue U.
Stanford
SDSU
U. Alaska-Fairbanks
U. Arizona
U. Arkansas
UC Berkeley
UC Davis
UC Los Angeles
UC Riverside
UC San Diego
UC Santa Barbara
UC Santa Cruz
U. Colorado-Boulder
U. Hawaii
U. Memphis
U. Miami
8 International Member Institutions
PHILVOLCS (Phillipines)
INGEOMINAS (Columbia)
University of Iceland
University College London (U.K.)
Simon Fraser U. (Canada)
U. of Western Ontario (Canada)
CICESE (Mexico)
Institute of Geophysics (China)
Different rules for data access for US, North American, and Other Institutions
Some members use data for research, some primarily for teaching/learning
No commercial companies !

4. Host organization: UNAVCO
Executive Committee:
Chair David Sandwell
Vice Chair Sean Buckley
Secretary Falk Amelung
At Large Yuri Fialko
At Large Rowena Lohman
Ex-officio Howard Zebker

5. WInSAR focus areas Science drivers:
Monitor strain accumulation and release along the western North American Plate Boundary:
Subduction zones
Strike-slip faults (San Andreas & friends)
Basin & Range provence
Study the deformation of volcanic systems in the western US.
Natural groundwater movements
Monitor man-made deformation due to water withdrawal, mining, geothermal production, oil pumping, etc.
Western North America plate boundaries
From: Kevin Hefferan

6. Creep on the San Andreas Fault
Stack of 12 ERS interferograms spanning May 1992-Jan 2001
12 ERS interferograms spanning May 1992-Jan 2001
Figures from Isabelle Ryder
UC Berkeley

7. 2005 Swarm Obsidian Buttes M 5.1 Largest EQ = M 5.1 Total: M 5.3
All figures from Lohman and McGuire, JGR, 2007

8. InSAR Data
08/27/05-09/21/05
Salton
Sea
Profile
Fault
LOS
5 km

9. Cross-Fault Profile Seismicity alone ~ 5x too small
Aseismic fault slip
Elastic half space, distributed slip

10. Seattle, WA region: upper crustal faults, landslides & groundwater
InSAR results from:
Finnegan, Pritchard et al., submitted

11. Seattle Landslides
Landslides mapped by LiDAR in red
None creeping: implies rapid catastrophic motion
Decorrelation in Perkins Lane landslide area
Continuous subsidence from in the Port of Seattle

12. Recent high-impact publications (~3/year)
2004 Hilley, et al., Dynamics of slow-moving landslides from permanents scatterer analysis, Science, 304,
2005 Gourmelen, N. and F. Amelung, Post-seismic mantle relaxation in the Central Nevada Seismic Belt, Science 310:
2006 Fialko, Y., D. Sandwell, M. Simons, and P. Rosen, The origin of shallow earthquake slip deficit , Nature, 435.
2006 Fialko, Y., Interseismic strain accumulation and the earthquake potential on the southern San Andreas fault system, Nature, 441.
2006 Dixon, T. H., et al., Subsidence and flooding in New Orleans, Nature, 441,
2006 Wicks, C., W. Thatcher, D. Dzurisin and J. Svarc, Uplift, thermal unrest and magma intrusion at Yellowstone caldera, Nature, 440,
2007 Amelung, F., S.H. Yun, T. Walter and P. Segall. Stress control of deep rift intrusion at Mauna Loa volcano, Hawaii. Science.
2007 Chang, W.-L., R. B. Smith, C. Wicks, J. M. Farrell, and C. M. Puskas, Accelerated uplift and magmatic intrusion of the Yellowstone Caldera, to Science.
Publications rely on easy access to SAR imagery
through WinSAR