Volcano Hazards Program Office

Publications

Filter Total Items: 2,114
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Year Published: 2019

Locating shallow seismic sources with waves scattered by surface topography: Validation of the method at the Nevada Test Site

Accurate and robust source location is fundamental in seismology. Previously, we proposed a new full waveform location method using waves scattered by topography near the source, and we demonstrated its potential in obtaining accurate source location using synthetic data. In the work presented here, we validate this method with observed seismic...

Nian Wang; Yang Shen; Xueyang Bao; Flinders, Ashton

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Year Published: 2019

Hydroacoustic, seismic, and bathymetric observations of the 2014 submarine eruption at Ahyi Seamount, Mariana Arc

Ahyi seamount, a shallow submarine volcano in the Northern Mariana Islands, began erupting on April 23, 2014. Hydroacoustic eruption signals were observed on the regional Mariana seismic network and on distant hydrophones, and NOAA scuba divers working in the area soon after the eruption began heard and felt underwater explosion sounds. The NOAA...

Tepp, Gabrielle; Chadwick, William W.; Haney, Matthew M.; Lyons, John J.; Robert Dziak; Merle, Susan; Butterfield, Dave; Young, Charles W.

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Year Published: 2019

North Fork Toutle River debris flows initiated by atmospheric rivers: November 2006

In early November, 2006, an atmospheric river brought heavy rainfall and high freezing levels to the Pacific Northwest. Without snowpack to buffer the hydrologic response, the storm caused widespread landslides and debris flows in drainages sourced from every central Cascades volcano. At Mount St. Helens, in southwestern Washington State, intense...

Mosbrucker, Adam; Spicer, Kurt R.; Major, Jon J.

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Year Published: 2019

Assessing the precision and accuracy of particle-size analysis with a laboratory laser-diffraction analyzer

The purpose of this study is to assess the precision and accuracy of laboratory laser-diffraction particle-size distribution (PSD) analysis in support of an effort to formally adopt the method for routine use in U.S. Geological Survey (USGS) sediment laboratories. USGS sediment laboratories analyze the PSD of sediment in support of a wide variety...

Norton, Katherine K.

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Year Published: 2019

Authigenic mineral texture in submarine 1979 basalt drill core, Surtsey volcano, Iceland

Micrometer-scale maps of authigenic microstructures in submarine basaltic tuff specimens from a 1979 Surtsey volcano, Iceland, drill core acquired 15 years after eruptions terminated provide fresh perspectives for deciphering the initial alteration of oceanic basalt in a low temperature hydrothermal system. A novel investigative approach...

Jackson, M.D.; Couper, S.; Stan, S.V.; Ivarsson, M.; Czabaj, M.W.; Tamura, N.; Parkinson, D.; Miyagi, L.M.; Moore, James G.

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Year Published: 2019

The 2017-19 activity at Mount Agung in Bali (Indonesia): Intense unrest, monitoring, crisis response, evacuation, and eruption

After 53 years of quiescence, Mount Agung awoke in August 2017, with intense seismicity, measurable ground deformation, and thermal anomalies in the summit crater. Although the seismic unrest peaked in late September and early October, the volcano did not start erupting until 21 November. The most intense explosive eruptions with accompanying...

Syahbana, D.K.; Kasbani, K.; Suantika, G.; Prambada, O.; Andreas, A.; Saing, U.; Kunrat, S.; Andreastuti, S.L.; Martanto, S.; Kriswati, E.; Suparman, Y.; Humaida, H.; Ogburn, Sarah E.; Kelly, Peter J.; Wellik, John; Wright, Heather; Pesicek, Jeremy D.; Wessels, Rick; Kern, Christoph; Lisowski, Michael; Diefenbach, Angela K.; Poland, Michael P.; Francois Beauducel; Vaughan, R. Greg; Pallister, John S.; Lowenstern, Jacob B.

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Year Published: 2019

Modulation of seismic activity in Kīlauea’s Upper East Rift Zone by summit pressurization

Kīlauea Volcano is underlain by a complex, laterally-extensive magmatic plumbing system. Although in recent decades it has mainly erupted through vents along the middle East Rift Zone and summit caldera, eruptions can occur anywhere along its two laterally extensive rift zones, as demonstrated by the dramatic eruptive activity of 2018. Forecasting...

Wauthier, Christelle; Roman, Diana C.; Poland, Michael P.

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Year Published: 2019

Real-time monitoring of debris-flow velocity and mass deformation from field experiments with high sample rate lidar and video

Debris flows evolve in both time and space in complex ways, commonly starting as coherent failures but then quickly developing structures such as roll waves and surges. This process is readily observed, but difficult to study or quantify because of the speed at which it occurs. Many methods for studying debris flows consist of point measurements (...

Rengers, Francis K.; Rapstine, Thomas; Allstadt, Kate E.; Olsen, Michael; Bunn, Michael; Iverson, Richard M.; Kean, Jason W.; Leshchinsky, Ben; Logan, Matthew; Sharifi-Mood, Mahyar; Obryk, Maciej; Smith, Joel B.

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Year Published: 2019

SUSTAIN drilling at Surtsey volcano, Iceland, tracks hydrothermal and microbiological interactions in basalt 50 years after eruption

The 2017 Surtsey Underwater volcanic System for Thermophiles, Alteration processes and INnovative concretes (SUSTAIN) drilling project at Surtsey volcano, sponsored in part by the International Continental Scientific Drilling Program (ICDP), provides precise observations of the hydrothermal, geochemical, geomagnetic, and microbiological changes...

Jackson, M.D.; Gudmundsson, M.T.; Weisenberger, T.B.; Rhodes, J.M.; Stefánsson, A.; Kleine, B.; Lippert, P.C.; Marquardt, J.M.; Reynolds, H.I.; Kück, J.; Marteinsson, V.Þ.; Vannier, P.; Bach, W.; Barich, A.; Bergsten, P.; Bryce, J. G.; Cappelletti, P.; Couper, S.; Fahnestock, M.F.; Gorny, C.; Grimaldi, C.; Groh, M.; Guðmundsson, Á.; Gunnlaugsson, Á.Þ.; Hamlin, C.; Högnadóttir, Þ.; Jónasson, K.; Jónsson, S.S.; Jørgensen, S.L.; Klonowski, A.; Marshall, B.V.; McPhie, J.; Moore, James G.; Ólafsson, E.S.; Onstag, S.L.; Perez, V.; Prause, S.; Snorasson, S.P.; Türke, A.; White, J.D.L.; Zimanowski, B.

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Year Published: 2019

3D electrical conductivity imaging of Halema‘uma‘u lava lake (Kīlauea volcano)

Before the 2018 collapse of the summit of Kīlauea volcano, a ca. 200 m in diameter lava lake inside of Halema‘uma‘u crater was embedded in a very active hydrothermal system. In 2015, we carried out an electrical conductivity survey and the data were inverted in 3D. The lack of conductivity contrast precludes distinguishing the lava column from the...

Gailler, Lydie; Kauahikaua, James P.; Lénat, Jean-François; Revil, André; Gresse, Marceau; Ahmed, Abdellahi Soueid; Cluzel, Nicolas; Manthilake, Geeth; Gurioli, Lucia; Johnson, Tim B.; Finizola, Anthony; Delcher, Eric

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Year Published: 2019

Monitoring volcanic deformation

Whereas research in volcano geodesy seeks to push the boundaries of our knowledge of the physics of volcanoes, monitoring looks at changes in volcano behavior to predict when a volcanic crisis might develop. To be effective, geodetic monitoring must be done before, during, and after eruptions and must be integrated with other monitoring...

Battaglia, Maurizio; Alpala, Jorge; Alpala, Rosa; Angarita, Mario; Arcos, Dario; Eullides, Leonardo; Euillades, Pablo; Mueller, Cyrill; Narvaez, Lourdes

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Year Published: 2019

Volcano deformation: Insights into magmatic systems

Volcano geodesy is the branch of geodetic science that deals with the changing shapes of volcanoes, whether large or small, deep-seated or surficial. Together with seismicity and volcanic gas flux, deformation of the ground surface can be a key indicator of subsurface conditions and processes at volcanoes—information that not only improves...

Dzurisin, Daniel
Volcano deformation: insights into magmatic systems, in Meyers R. (eds) Encyclopedia of Complexity and Systems Science. Springer, Berlin, Heidelberg, doi.org/10.1007/978-3-642-27737-5_635-1.