Publications
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Volcano dome dynamics at Mount St. Helens: Deformation and intermittent subsidence monitored by seismicity and camera imagery pixel offsets
The surface deformation field measured at volcanic domes provides insights into the effects of magmatic processes, gravity- and gas-driven processes, and the development and distribution of internal dome structures. Here we study short-term dome deformation associated with earthquakes at Mount St. Helens, recorded by a permanent optical camera and seismic monitoring network. We use Digital Image C
Authors
Jacqueline T. Salzer, Weston A. Thelen, Mike R. James, Thomas R. Walter, Seth C. Moran, Roger P. Denlinger
Holocene volcanism of the upper McKenzie River catchment, central Oregon Cascades, USA
To assess the complexity of eruptive activity within mafic volcanic fields, we present a detailed geologic investigation of Holocene volcanism in the upper McKenzie River catchment in the central Oregon Cascades, United States. We focus on the Sand Mountain volcanic field, which covers 76 km2 and consists of 23 vents, associated tephra deposits, and lava fields. We find that the Sand Mountain volc
Authors
Natalia I. Deligne, Richard M. Conrey, Katharine V. Cashman, Duane E. Champion, William H. Amidon
Rapid fluvial incision of a late Holocene lava flow: Insights from LiDAR, alluvial stratigraphy, and numerical modeling
Volcanic eruptions fundamentally alter landscapes, paving over channels, decimating biota, and emplacing fresh, unweathered material. The fluvial incision of blocky lava flows is a geomorphic puzzle. First, high surface permeability and lack of sediment should preclude geomorphically effective surface runoff and dissection. Furthermore, past work has demonstrated the importance of extreme floods i
Authors
Kristin Sweeney, Joshua J. Roering
Dense surface seismic data confirm non-double-couple source mechanisms induced by hydraulic fracturing
We have determined source mechanisms for nine high-quality microseismic events induced during hydraulic fracturing of the Montney Shale in Canada. Seismic data were recorded using a dense regularly spaced grid of sensors at the surface. The design and geometry of the survey are such that the recorded P-wave amplitudes essentially map the upper focal hemisphere, allowing the source mechanism to be
Authors
Jeremy Pesicek, Konrad Cieślik, Marc-André Lambert, Pedro Carrillo, Brad Birkelo
Joint analysis of geodetic and earthquake fault-plane solution data to constrain magmatic sources: A case study from Kīlauea Volcano
A joint analysis of geodetic and seismic datasets from Kīlauea Volcano during a period of magmatic unrest in 2006 demonstrates the effectiveness of this combination for testing and constraining models of magma dynamics for a complex, multi-source system. At the end of 2003, Kīlauea's summit began a four-year-long period of inflation due to a surge in magma supply to the volcano. In 2006, for the f
Authors
Christelle Wauthier, Diana C. Roman, Michael P. Poland
3-D high-speed imaging of volcanic bomb trajectory in basaltic explosive eruptions
Imaging, in general, and high speed imaging in particular are important emerging tools for the study of explosive volcanic eruptions. However, traditional 2-D video observations cannot measure volcanic ejecta motion toward and away from the camera, strongly hindering our capability to fully determine crucial hazard-related parameters such as explosion directionality and pyroclasts' absolute veloci
Authors
D. Gaudin, J Taddeucci, Bruce F. Houghton, Tim R. Orr, D. Andronico, E. Del Bello, U. Kueppers, T. Ricci, P. Scarlato
Abstract volume for the 2016 biennial meeting of the Yellowstone Volcano Observatory
IntroductionEvery two years, scientists, natural resource managers, outreach specialists, and a variety of other interested parties get together for the biennial meeting of the Yellowstone Volcano Observatory (YVO). Each time, the theme varies. In past years, we have focused the meeting around topics including monitoring plans, emergency response, geodesy, and outreach. This year, we spent the fir
Low-δD hydration rinds in Yellowstone perlites record rapid syneruptive hydration during glacial and interglacial conditions
Hydration of silicic volcanic glass forms perlite, a dusky, porous form of altered glass characterized by abundant “onion-skin” fractures. The timing and temperature of perlite formation are enigmatic and could plausibly occur during eruption, during post-eruptive cooling, or much later at ambient temperatures. To learn more about the origin of natural perlite, and to fingerprint the hydration wat
Authors
Ilya N. Bindeman, Jacob B. Lowenstern
Camera system considerations for geomorphic applications of SfM photogrammetry
The availability of high-resolution, multi-temporal, remotely sensed topographic data is revolutionizing geomorphic analysis. Three-dimensional topographic point measurements acquired from structure-from-motion (SfM) photogrammetry have been shown to be highly accurate and cost-effective compared to laser-based alternatives in some environments. Use of consumer-grade digital cameras to generate te
Authors
Adam R. Mosbrucker, Jon J. Major, Kurt R. Spicer, John Pitlick
Interaction between climate, volcanism, and isostatic rebound in Southeast Alaska during the last deglaciation
Observations of enhanced volcanic frequency during the last deglaciation have led to the hypothesis that ice unloading in glaciated volcanic terrains can promote volcanism through decompression melting in the shallow mantle or a reduction in crustal magma storage time. However, a direct link between regional climate change, isostatic adjustment, and the initiation of volcanism remains to be demons
Authors
Summer Praetorius, Alan Mix, Britta Jensen, Duane Froese, Glenn A. Milne, Matthew Wolhowe, Jason A. Addison, Fred Prahl
Magma decompression rates during explosive eruptions of Kīlauea volcano, Hawaii, recorded by melt embayments
The decompression rate of magma as it ascends during volcanic eruptions is an important but poorly constrained parameter that controls many of the processes that influence eruptive behavior. In this study, we quantify decompression rates for basaltic magmas using volatile diffusion in olivine-hosted melt tubes (embayments) for three contrasting eruptions of Kīlauea volcano, Hawaii. Incomplete exso
Authors
David J. Ferguson, Helge M. Gonnermann, Philipp Ruprecht, Terry Plank, Erik H. Hauri, Bruce F. Houghton, Donald A. Swanson
Results of the eruptive column model inter-comparison study
This study compares and evaluates one-dimensional (1D) and three-dimensional (3D) numerical models of volcanic eruption columns in a set of different inter-comparison exercises. The exercises were designed as a blind test in which a set of common input parameters was given for two reference eruptions, representing a strong and a weak eruption column under different meteorological conditions. Compa
Authors
Antonio Costa, Yujiro Suzuki, M. Cerminara, Ben J. Devenish, T. Esposti Ongaro, Michael Herzog, Alexa R. Van Eaton, L.C. Denby, Marcus Bursik, Mattia de' Michieli Vitturi, S. Engwell, Augusto Neri, Sara Barsotti, Arnau Folch, Giovanni Macedonio, F. Girault, G. Carazzo, S. Tait, E. Kaminski, Larry G. Mastin, Mark J. Woodhouse, Jeremy C. Phillips, Andrew J. Hogg, Wim Degruyter, Costanza Bonadonna