Publications
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Volcanic ash plume identification using polarization lidar: Augustine eruption, Alaska
During mid January to early February 2006, a series of explosive eruptions occurred at the Augustine volcanic island off the southern coast of Alaska. By early February a plume of volcanic ash was transported northward into the interior of Alaska. Satellite imagery and Puff volcanic ash transport model predictions confirm that the aerosol plume passed over a polarization lidar (0.694 mm wavelength
Authors
Kenneth Sassen, Jiang Zhu, Peter W. Webley, K. Dean, Patrick Cobb
The question of recharge to the deep thermal reservoir underlying the geysers and hot springs of Yellowstone National Park: Chapter H in Integrated geoscience studies in Integrated geoscience studies in the Greater Yellowstone Area—Volcanic, tectonic,
The extraordinary number, size, and unspoiled beauty of the geysers and hot springs of Yellowstone National Park (the Park) make them a national treasure. The hydrology of these special features and their relation to cold waters of the Yellowstone area are poorly known. In the absence of deep drill holes, such information is available only indirectly from isotope studies. The δD-δ18O values of pre
Authors
Robert O. Rye, Alfred Hemingway Truesdell
Modeling the dynamic response of a crater glacier to lava-dome emplacement: Mount St Helens, Washington, USA
The debris-rich glacier that grew in the crater of Mount St Helens after the volcano's cataclysmic 1980 eruption was split in two by a new lava dome in 2004. For nearly six months, the eastern part of the glacier was squeezed against the crater wall as the lava dome expanded. Glacier thickness nearly doubled locally and surface speed increased substantially. As squeezing slowed and then stopped,
Authors
Stephen F. Price, Joseph S. Walder
Crisis GIS--Preparing for and responding to volcanic eruptions in the United States
No abstract available.
Authors
D.W. Ramsey, J.E. Robinson, S. P. Schilling, J.R. Schaefer, Frank A. Trusdell
Crustal deformation of the Yellowstone-Snake River Plain volcano-tectonic system-Campaign and continuous GPS observations, 1987-2004
The Yellowstone-Snake River Plain tectonomagmatic province resulted from Late Tertiary volcanism in western North America, producing three large, caldera-forming eruptions at the Yellowstone Plateau in the last 2 Myr. To understand the kinematics and geodynamics of this volcanic system, the University of Utah conducted seven GPS campaigns at 140 sites between 1987 and 2003 and installed a networ
Authors
C.M. Puskas, R. B. Smith, Charles M. Meertens, W. L. Chang
A user-friendly one-dimensional model for wet volcanic plumes
This paper presents a user-friendly graphically based numerical model of one-dimensional steady state homogeneous volcanic plumes that calculates and plots profiles of upward velocity, plume density, radius, temperature, and other parameters as a function of height. The model considers effects of water condensation and ice formation on plume dynamics as well as the effect of water added to the plu
Authors
Larry G. Mastin
Borehole observations of continuous strain and fluid pressure: Chapter 9
Strain is expansion, contraction, or distortion of the volcanic edifice and surrounding crust. As a result of magma movement, volcanoes may undergo enormous strain prior to and during eruption. Global Positioning System (GPS) observations can in principle be used to determine strain by taking the difference between two nearby observations and dividing by the distance between them. Two GPS stations
Authors
Evelyn A. Roeloffs, A. T. Linde
Explosive eruptive record in the Katmai region, Alaska Peninsula: An overview
At least 15 explosive eruptions from the Katmai cluster of volcanoes and another nine from other volcanoes on the Alaska Peninsula are preserved as tephra layers in syn- and post-glacial (Last Glacial Maximum) loess and soil sections in Katmai National Park, AK. About 400 tephra samples from 150 measured sections have been collected between Kaguyak volcano and Mount Martin and from Shelikof Strait
Authors
Judy Fierstein
Hydrothermal systems and volcano geochemistry
The upward intrusion of magma from deeper to shallower levels beneath volcanoes obviously plays an important role in their surface deformation. This chapter will examine less obvious roles that hydrothermal processes might play in volcanic deformation. Emphasis will be placed on the effect that the transition from brittle to plastic behavior of rocks is likely to have on magma degassing and hydrot
Authors
R.O. Fournier
Magmatic gas efflux at the Ukinrek Maars, Alaska
No abstract available.
Authors
Deborah Bergfeld, W. C. Evans, A.G. Hunt, R. G. McGimsey
Late pleistocene and holocene caldera-forming eruptions of Okmok Caldera, Aleutian Islands, Alaska
This chapter contains sections titled:IntroductionGeologic settingField and Analytical MethodsResultsDiscussionConclusions
Authors
Jessica F. Larsen, Christina A. Neal, Janet Schaefer, Jim Beget, Chris Nye
Strombolian explosive styles and source conditions
Forward Looking Infrared Radiometer (FLIR) cameras offer a unique view of explosive volcanism by providing an image of calibrated temperatures. In this study, 344 eruptive events at Stromboli volcano, Italy, were imaged in 2001–2004 with a FLIR camera operating at up to 30 Hz. The FLIR was effective at revealing both ash plumes and coarse ballistic scoria, and a wide range of eruption styles was r
Authors
Matthew R. Patrick, Andrew J. L. Harris, Maurizio Ripepe, Jonathan Dehn, David A. Rothery, Sonia Calvari