Crustal deformation of the Yellowstone caldera from first GPS measurements - 1987-1989

Details Crustal deformation of the Yellowstone caldera from first GPS measurements - 1987-1989 Crustal deformation of the Yellowstone caldera from first GPS measurements - 1987-1989

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1763m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Sept. 1991, p. 1763-1766.

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8

Calderas, Deformation, Earth Crust, Global Positioning System, Yellowstone National Park (Id-Mt-Wy), Geodetic Accuracy, Level (Horizontal), Plateaus, Volcanoes

Scientific paper

Data on the precision and accuracy of the GPS measurements are presented, and notable areas of crustal deformation of the Yellowstone volcanic system are identified. After two years, 1987-1989, crustal displacements determined from GPS are found to be 1-2 standard deviations above the level of uncertainty. GPS height differences and orthometric height changes observed from first-order leveling agree within their respective uncertainties and both suggest up to 20 mm of subsidence across the northern part of the caldera. GPS results show up to 66 mm of uplift at the northwest caldera boundary. It is suggested that the vertical surface deformation in Yellowstone is caused by magmatic or hydrothermal processes.

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