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
Chuck Wicks et al. discusses Chait�n volcano, Chile, in Nature
Wicks, C.; de la Llera, J. C.; Lara, L.; Lowenstern, J. 2011, The role of dyking and fault control in the rapid onset of eruption at Chait�n volcano, Chile. 478, 374-377, doi:10.1038/nature10541.
Paper
Supplemental InformationHigh-resolution interferograms of Kilauea Volcano, Hawaii
InSAR has become a cornerstone of the Hawaiian Volcano Observatory's monitoring strategy for Kilauea and Mauna Loa volcanoes. Since 2003, this has been accomplished using data from the ENVISAT satellite (European Space Agency), with additional data from the ALOS (Japanese Space Agency) and RADARSAT-1 (Canadian Space Agency) satellites. In October 2010, however, the orbit of ENVISAT was changed, and interferometry in Hawaii is no longer optimal from that platform.
To compensate for the reduced capabilities of ENVISAT and the continued need for timely InSAR results, the Hawaiian Volcano Observatory (http://hvo.wr.usgs.gov), together with the Group on Earth Observation (http://supersites.earthobservations.org/main.php) Supersites initiative, has begun to obtain SAR images from the German Space Agency's TerraSAR-X satellite. TerraSAR-X data have excellent spatial resolution (~3 m), and the satellite repeats its orbit every 11 days. To take advantage of this excellent temporal and spatial resolution (compared to other SAR satellites), Nicole Richter, a graduate student at the University of Jena, Germany, who is working at the Hawaiian Volcano Observatory on her Masters research, has begun processing TerraSAR-X interferograms of Kilauea's summit using a high-resolution DEM (constructed from LIDAR data) for topographic phase corrections. The resulting interferograms have a pixel size of ~3 m, providing unprecedented spatial resolution of deformation at Kilauea. These interferograms are perhaps the highest-resolution yet produced for any volcano.
Kilauea's summit has been the site of an ongoing eruption since 2008 and experiences frequent episodes of deformation referred to as "DI events" (see chapter 9 of http://pubs.usgs.gov/pp/pp1676/ for a discussion of this type of activity), which are characterized by hours to days of deflation (~1-4 cm), followed by rapid reinflation over the ensuing hours to days. Tilt measurements collected by the Hawaiian Volcano Observatory suggest that these events have a shallow source (depths of ~1-2-km) and are related to cycles of magma withdrawal and accumulation.
TerraSAR-X interferograms, thanks to their frequent repeat time and high resolution (when processed with the LIDAR DEM) show net changes due to these deformation cycles very clearly, and also suggest some localized deformation in and around Halemaumau Crater, near the summit eruptive vent. Richter is currently processing the entire archive of TerraSAR-X data using the high-resolution interferogram, with the goal of better characterizing the source of DI events, and also examining small-scale deformation associated with Halemaumau Crater and Kilauea's ongoing summit eruption.
Oblique aerial photograph looking southeast at the summit eruptive vent of Kilauea Volcano. The vent is inset within Halema`uma`u Crater, and has been characterized by a persistent plume of gas and ash since it formed in March 2008. The Hawaiian Volcano Observatory, which has monitored the volcanoes of Hawaii on a continuous basis since 1912, is in the middle ground on the rim of the caldera.
The above interferogram spans January 17-February 19, 2010. Colored fringes indicate line-of-sight deformation of the surface of the Earth as viewed by the TerraSAR-X satellite (each color cycle is equivalent to about 1.5 cm of line-of-sight deformation). Topographic phase in this interferogram has been corrected using a 3-m-resolution DEM that is based on LIDAR data collected in 2009. In the interferogram, deflation of ~3 cm (line-of-sight), related to cycles of deflation and inflation termed "DI events," is centered within Kilauea caldera. Additional fringes suggest localized deformation on the southwest margin of Halemaumau Crater. The significance of the small-scale motion is not yet clear, but will be explored by using the LIDAR DEM to process additional interferograms spanning 2008-present.- Bibliographies updated for: Dan Dzurisin, Zhong Lu, and Mike Poland.
- 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.
Recently Added Papers
Additional Papers
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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