Kurt Spicer
Long term monitoring of water and sediment discharge at Mount St. Helens.
Science and Products
Filter Total Items: 22
Bathymetric map and area/capacity table for Castle Lake, Washington Bathymetric map and area/capacity table for Castle Lake, Washington
The May 18, 1980, eruption of Mount St. Helens produced a 2.5-cubic-kilometer debris avalanche that dammed South Fork Castle Creek, causing Castle Lake to form behind a 20-meter-tall blockage. Risk of a catastrophic breach of the newly impounded lake led to outlet channel stabilization work, aggressive monitoring programs, mapping efforts, and blockage stability studies. Despite...
Authors
Adam R. Mosbrucker, Kurt R. Spicer
Evidence for degassing of fresh magma during the 2004-2008 eruption of Mount St. Helens: Subtle signals from the hydrothermal system Evidence for degassing of fresh magma during the 2004-2008 eruption of Mount St. Helens: Subtle signals from the hydrothermal system
Results from chemical and isotopic analyses of water and gas collected between 2002 and 2016 from sites on and around Mount St. Helens are used to assess magmatic degassing related to the 2004-2008 eruption. During 2005 the chemistry of hot springs in The Breach of Mount St. Helens showed no obvious response to the eruption, and over the next few years, changes were subtle, giving only...
Authors
Deborah Bergfeld, William C. Evans, Kurt R. Spicer, Andrew G. Hunt, Peter J. Kelly
Camera system considerations for geomorphic applications of SfM photogrammetry 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...
Authors
Adam R. Mosbrucker, Jon J. Major, Kurt R. Spicer, John Pitlick
Where is the hot rock and where is the ground water— Using CSAMT to map beneath and around Mount St. Helens Where is the hot rock and where is the ground water— Using CSAMT to map beneath and around Mount St. Helens
We have observed several new features in recent controlled-source audio-frequency magnetotelluric (CSAMT) soundings on and around Mount St. Helens, Washington State, USA. We have identified the approximate location of a strong electrical conductor at the edges of and beneath the 2004–08 dome. We interpret this conductor to be hot brine at the hot-intrusive-cold-rock interface. This...
Authors
Jeff Wynn, Adam R. Mosbrucker, Herbert Pierce, Kurt R. Spicer
Digital database of channel cross-section surveys, Mount St. Helens, Washington Digital database of channel cross-section surveys, Mount St. Helens, Washington
Stream-channel cross-section survey data are a fundamental component to studies of fluvial geomorphology. Such data provide important parameters required by many open-channel flow models, sediment-transport equations, sediment-budget computations, and flood-hazard assessments. At Mount St. Helens, Washington, the long-term response of channels to the May 18, 1980, eruption, which...
Authors
Adam R. Mosbrucker, Kurt R. Spicer, Jon J. Major, Dennis R. Saunders, Tami S. Christianson, Cole G. Kingsbury
Evaluating turbidity and suspended-sediment concentration relations from the North Fork Toutle River basin near Mount St. Helens, Washington; annual, seasonal, event, and particle size variations - a preliminary analysis. Evaluating turbidity and suspended-sediment concentration relations from the North Fork Toutle River basin near Mount St. Helens, Washington; annual, seasonal, event, and particle size variations - a preliminary analysis.
Regression of in-stream turbidity with concurrent sample-based suspended-sediment concentration (SSC) has become an accepted method for producing unit-value time series of inferred SSC (Rasmussen et al., 2009). Turbidity-SSC regression models are increasingly used to generate suspended-sediment records for Pacific Northwest rivers (e.g., Curran et al., 2014; Schenk and Bragg, 2014...
Authors
Mark A. Uhrich, Kurt R. Spicer, Adam R. Mosbrucker, Tami S. Christianson
Science and Products
Filter Total Items: 22
Bathymetric map and area/capacity table for Castle Lake, Washington Bathymetric map and area/capacity table for Castle Lake, Washington
The May 18, 1980, eruption of Mount St. Helens produced a 2.5-cubic-kilometer debris avalanche that dammed South Fork Castle Creek, causing Castle Lake to form behind a 20-meter-tall blockage. Risk of a catastrophic breach of the newly impounded lake led to outlet channel stabilization work, aggressive monitoring programs, mapping efforts, and blockage stability studies. Despite...
Authors
Adam R. Mosbrucker, Kurt R. Spicer
Evidence for degassing of fresh magma during the 2004-2008 eruption of Mount St. Helens: Subtle signals from the hydrothermal system Evidence for degassing of fresh magma during the 2004-2008 eruption of Mount St. Helens: Subtle signals from the hydrothermal system
Results from chemical and isotopic analyses of water and gas collected between 2002 and 2016 from sites on and around Mount St. Helens are used to assess magmatic degassing related to the 2004-2008 eruption. During 2005 the chemistry of hot springs in The Breach of Mount St. Helens showed no obvious response to the eruption, and over the next few years, changes were subtle, giving only...
Authors
Deborah Bergfeld, William C. Evans, Kurt R. Spicer, Andrew G. Hunt, Peter J. Kelly
Camera system considerations for geomorphic applications of SfM photogrammetry 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...
Authors
Adam R. Mosbrucker, Jon J. Major, Kurt R. Spicer, John Pitlick
Where is the hot rock and where is the ground water— Using CSAMT to map beneath and around Mount St. Helens Where is the hot rock and where is the ground water— Using CSAMT to map beneath and around Mount St. Helens
We have observed several new features in recent controlled-source audio-frequency magnetotelluric (CSAMT) soundings on and around Mount St. Helens, Washington State, USA. We have identified the approximate location of a strong electrical conductor at the edges of and beneath the 2004–08 dome. We interpret this conductor to be hot brine at the hot-intrusive-cold-rock interface. This...
Authors
Jeff Wynn, Adam R. Mosbrucker, Herbert Pierce, Kurt R. Spicer
Digital database of channel cross-section surveys, Mount St. Helens, Washington Digital database of channel cross-section surveys, Mount St. Helens, Washington
Stream-channel cross-section survey data are a fundamental component to studies of fluvial geomorphology. Such data provide important parameters required by many open-channel flow models, sediment-transport equations, sediment-budget computations, and flood-hazard assessments. At Mount St. Helens, Washington, the long-term response of channels to the May 18, 1980, eruption, which...
Authors
Adam R. Mosbrucker, Kurt R. Spicer, Jon J. Major, Dennis R. Saunders, Tami S. Christianson, Cole G. Kingsbury
Evaluating turbidity and suspended-sediment concentration relations from the North Fork Toutle River basin near Mount St. Helens, Washington; annual, seasonal, event, and particle size variations - a preliminary analysis. Evaluating turbidity and suspended-sediment concentration relations from the North Fork Toutle River basin near Mount St. Helens, Washington; annual, seasonal, event, and particle size variations - a preliminary analysis.
Regression of in-stream turbidity with concurrent sample-based suspended-sediment concentration (SSC) has become an accepted method for producing unit-value time series of inferred SSC (Rasmussen et al., 2009). Turbidity-SSC regression models are increasingly used to generate suspended-sediment records for Pacific Northwest rivers (e.g., Curran et al., 2014; Schenk and Bragg, 2014...
Authors
Mark A. Uhrich, Kurt R. Spicer, Adam R. Mosbrucker, Tami S. Christianson