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Accelerated uplift and magmatic intrusion of the Yellowstone caldera, 2004 to 2006

January 1, 2007

The Yellowstone caldera began a rapid episode of ground uplift in mid-2004, revealed by Global Positioning System and interferometric synthetic aperture radar measurements, at rates up to 7 centimeters per year, which is over three times faster than previously observed inflation rates. Source modeling of the deformation data suggests an expanding volcanic sill of ???1200 square kilometers at a 10-kilometer depth beneath the caldera, coincident with the top of a seismically imaged crustal magma chamber. The modeled rate of source volume increase is 0.1 cubic kilometer per year, similar to the amount of magma intrusion required to supply the observed high heat flow of the caldera. This evidence suggests magma recharge as the main mechanism for the accelerated uplift, although pressurization of magmatic fluids cannot be ruled out.

Citation Information

Publication Year 2007
Title Accelerated uplift and magmatic intrusion of the Yellowstone caldera, 2004 to 2006
DOI 10.1126/science.1146842
Authors Wu-Lung Chang, Robert B. Smith, Charles Wicks, J.M. Farrell, C.M. Puskas
Publication Type Article
Publication Subtype Journal Article
Series Title Science
Series Number
Index ID 70031698
Record Source USGS Publications Warehouse
USGS Organization Volcano Hazards Program

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