Seismic Evidence for Fluid Migration Accompanying Subsidence of the Yellowstone Caldera

Waite Gregory, University of Utah Department of Geology and Geophysics

This report describes the largest earthquake swarm in Yellowstone National Park's recorded history. For a little over 3 months beginning in October 1985, the swarm contained more than 3000 earthquakes with a magnitude greater than 5. The swarm had unusual characteristics that could be explained by the migration of hydrothermal fluids. Maps and numerous graphs support the text.

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Subject: Geoscience:Geology:Geophysics:Seismology, Geoscience:Geology:Structural Geology, Geochemistry
Resource Type: Audio/Visual:Maps, Scientific Resources:Research Results, Datasets and Tools:Datasets
Theme: Teach the Earth:Course Topics:Geochemistry, Geophysics, Structural Geology
Focus on Yellowstone: Seismicity, Deformation, geophysics