InSAR Research Results
PAPERS, FILES, LINKS, AND OTHER RESEARCH RESULTS
Papers
Group Member Bibliographies
- Dan Dzurisin
- Zhong Lu
- Mike Poland
- Wayne Thatcher
- Chuck Wicks
- Partial Group Listing of additional papers
Recent News
New InSAR Study of Aleutian Arc Volcanoes
Zhong Lu and Dan Dzurisin processed nearly 12,000 SAR images to produce about 25,000 interferograms for volcanoes in the Aleutian arc, which they analyzed for evidence of surface deformation at each of the arc's 52 historically active volcanoes. They concluded that magmatic, hydrothermal, tectonic, and thermoelastic (cooling) processes all play a role in causing surface deformation at Aleutian volcanoes. Only 13 of the 44 volcanoes where the InSAR observations were adequate showed no evidence of surface deformation of any kind during 1992-2010. Three of those 13 (Cleveland, Shishaldin, and Pavlof) erupted repeatedly without deforming. Surface deformation attributed to magmatic intrusions occurred beneath 21 of the volcanoes with adequate observations, and also in the Strandline Lake area north of Mount Spurr. Lu and Dzurisin attributed shallow-seated subsidence seen at 7 of the 44 well-observed volcanoes to thermoelastic contraction of young volcanic flows or to fluid loss from hydrothermal systems. The most likely cause of deeper-seated deflation at the Fisher, Emmons Lake, and Aniakchak calderas is volatile loss from crustal magma reservoirs. During the ~20 year study period, eruptions occurred at 17 of the 52 historically active Aleutian volcanoes, and InSAR detected some form of deformation at more than 80 percent of the 44 well-observed volcanoes. A book-length manuscript that discusses these results and their implications for magmatic systems beneath Aleutian volcanoes is currently in USGS review.InSAR Evidence for Spokane Fault
In 2001 a sequence of earthquakes struck the city of Spokane Washington. Wicks et al. have used InSAR to show that the earthquakes occurred on a shallow thrust fault beneath the city of Spokane. The previously unknown fault, which the authors named the "Spokane Fault", presents a seismic hazard to Spokane that will require further study to better assess the potential.
Wicks, C.; Weaver, C.; Bodin, P.; and Sherrod, B., 2013, InSAR Evidence for an active shallow thrust fault beneath the city of Spokane Washington, USA, J. Geophys. Res. Solid Earth, 118, doi:10.1002/jgrb.50118.
Paper
Recently Added Papers
- Bibliographies updated for: Chuck Wicks.
Additional Papers
- Uplift, Thermal Unrest and Magma Intrusion at Yellowstone Caldera
- Chuck Wicks, Wayne Thatcher, Dan Dzurisin, and Jerry Svarc
- Nature, 440, 72-75, DOI: 10.1038/nature04507, 2006
- Supplementary Information
- Inflation model of Uzon caldera, Kamchatka, constrained by satellite radar interferometry observations
- Paul Lundgren and Zhong Lu
- Geophysical Research Letters, Vol. 22, L06301, DOI:10.1029/2005GL025181, 2006
- Quiescent deformation of the Aniakchak Caldera, Alaska, mapped by InSAR
- Oh-Ig Kwoun, Zhong Lu, Christina Neal, Charles Wicks Jr.
- Geology, January 2006, v. 34, no. 1, p. 5-8
- Surface deformation associate with the March 1996 earthquake swarm at Akutan Island, Alaska, revealed by C-band ERS and L-band JERS radar interferometry
- Zhong Lu, Charles Wicks, Jr., Oh-Ig Kwoun, John A. Power, and Daniel Dzurisin
- Canadian Journal of Remote Sensing, Vol. 31, No. 1, pp. 7-20, 2005
- Interferometric Synthetic Aperture Radar (InSAR) Study of Okmok Volcano, Alaska, 1992-2003: Magma Supply Dynamics and Post-emplacement Lava Flow Deformation
- Zhong Lu, Timothy Masterlark, and Daniel Dzurisin
- Journal of Geophysical Research, vol. 110, no. B2, B02403, DOI:10.1029/2004JB003148, 2005
- Geodetic observations and modeling of magmatic inflation at the Three Sisters volcanic center, central Oregon Cascade Range, USA
- Daniel Dzurisin, Michael Lisowski, Charles W. Wicks, Michael P. Poland, Elliot T. Endo
- Journal of Volcanology and Geothermal Research 150 (2006) 35-54
- Thickness distribution of a cooling pyroclastic flow deposit on Augustine Volcano, Alaska: Optimization using InSAR, FEMs, and an adaptive mesh algorithm
- Timothy Masterlark, Zhong Lu, Russell Rykhus
- Journal of Volcanology and Geothermal Research 150 (2006) 186-201
- On the absence of InSAR-detected volcano deformation spanning the 1995-1996 and 1999 eruptions of Shishaldin Volcano, Alaska
- S.C. Moran, O. Kwoun, T. Masterlark, Z. Lu
- Journal of Volcanology and Geothermal Research 150 (2006) 119-131
- The changing shapes of active volcanoes: History, evolution, and future challenges for volcano geodesy
- Michael Poland, Michael Hamburger, Andrew Newman
- Journal of Volcanology and Geothermal Research 150 (2006) 1-13
- Constraints on the mechanism of long-term, steady subsidence at Medicine Lake volcano, norther California, from GPS, leveling, and InSAR
- Michael Poland, Roland Bürgmann, Daniel Dzurisin, Michael Lisowski, Timothy Masterlark, Susan Owen, Jonathan Fink
- Journal of Volcanology and Geothermal Research 150 (2006) 55-78
- Migration of Fluids Beneath Yellowstone Caldera Inferred from Satellite Radar Interferometry
- Chuck Wicks, Wayne Thatcher, and Dan Dzurisin
- Science, 16 October 1998, v 282
- Renewed Uplift at the Yellowstone Caldera measured by Leveling Surveys and Satellite Radar Interferometry
- Dan Dzurisin, Chuck Wicks, and Wayne Thatcher
- Bulletin of Volcanology, 1999, v. 61, no. 6, p. 349-355
- InSAR fact sheet: Monitoring Ground Deformation from Space by Rosalind L. Helz. See figures from the Fact Sheet here.
Workshops
2008 Volcano Deformation and Temporal Gravity Change Workshop
The USGS Cascades Volcano Observatory held the 2008 Volcano Deformation and Temporal Gravity Change Workshop in Vancouver, WA, May 13 - 15 2008. Discussion topics included deformation monitoring, deformation modeling, and fluids and gravity studies.- Meeting Report
- Multi-Disciplinary Working Group Report
- Functional Requirement for a Deformation Modeling System
- Contact List of Participants Spreadsheet
- May 13: Recent eruptions and developments in deformation monitoring
- May 14: Deformation modeling capabilities and future applications
- May 15: Fluids and gravity constraints and opportunities
Posters
- Satellite InSAR Reveals a New Style of Deformation at Yellowstone Caldera by Chuck Wicks, Wayne Thatcher, and Dan Dzurisin, 2002.
- Stress Transfer, Thermal Unrest, and Implications for Seismic Hazards Associated with the Norris Uplift Anomaly in Yellowstone National Park by Chuck Wicks, Wayne Thatcher, and Dan Dzurisin, 2003.
Presentations
- Space Based Geodesy Using InSAR - View as a pdf or download the PowerPoint file.
- An Ongoing Episode of Magmatic Inflation at the Three Sisters Volcanic Center, Central Oregon Cascade Range, given at AGU in 2004 - View as a pdf or download the PowerPoint file.
Other Files
- Westdahl Volcano deformation movie
Links
- Tectonic Applications, presented by Tim Masterlark.
- List of InSAR Publications, some available for download in pdf format.
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