Publications
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Plenary: Progress in Regional Landslide Hazard Assessment—Examples from the USA
Landslide hazard assessment at local and regional scales contributes to mitigation of landslides in developing and densely populated areas by providing information for (1) land development and redevelopment plans and regulations, (2) emergency preparedness plans, and (3) economic analysis to (a) set priorities for engineered mitigation projects and (b) define areas of similar levels of hazard for
Authors
Rex L. Baum, William Schulz, Dianne L. Brien, William J. Burns, Mark E. Reid, Jonathan W. Godt
Ground-motion site effects from multimethod shear-wave velocity characterization at 16 seismograph stations deployed for aftershocks of the August 2011 Mineral, Virginia earthquake
We characterize shear-wave velocity versus depth (Vs profile) at 16 portable seismograph sites through the epicentral region of the 2011 Mw 5.8 Mineral (Virginia, USA) earthquake to investigate ground-motion site effects in the area. We used a multimethod acquisition and analysis approach, where active-source horizontal shear (SH) wave reflection and refraction as well as active-source multichanne
Authors
William J. Stephenson, Jackson K. Odum, Daniel E. McNamara, Robert A. Williams, Stephen J Angster
History of late Holocene earthquakes at the Willow Creek site on the Nephi segment, Wasatch fault zone, Utah
This 43-page report presents new data from the Willow Creek site that provides well-defined and narrow bounds on the times of the three youngest earthquakes on the southern strand of the Nephi segment, Wasatch Fault zone, and refines the time of the youngest earthquake to about 200 years ago. This is the youngest surface rupture on the entire Wasatch fault zone, which occurred about a century or l
Authors
Anthony J. Crone, Stephen F. Personius, Christopher DuRoss, Michael N. Machette, Shannon A. Mahan
Widespread loess-like deposit in the Martian northern lowlands identifies Middle Amazonian climate change
Consistently mappable units critical to distinguishing the style and interplay of geologic processes through time are sparse in the Martian lowlands. This study identifies a previously unmapped Middle Amazonian (ca. 1 Ga) unit (Middle Amazonian lowland unit, mAl) that postdates the Late Hesperian and Early Amazonian lowland plains by >2 b.y. The unit is regionally defined by subtle marginal scarps
Authors
James A. Skinner, Kenneth L. Tanaka, Thomas Platz
Relation of landslides triggered by the Kiholo Bay earthquake to modeled ground motion
The 2006 Kiholo Bay, Hawaii, earthquake triggered high concentrations of rock falls and slides in the steep canyons of the Kohala Mountains along the north coast of Hawaii. Within these mountains and canyons a complex distribution of landslides was triggered by the earthquake shaking. In parts of the area, landslides were preferentially located on east‐facing slopes, whereas in other parts of the
Authors
Edwin L. Harp, Stephen H. Hartzell, Randall W. Jibson, L. Ramirez-Guzman, Robert G. Schmitt
Seismic evidence for a crustal magma reservoir beneath the upper east rift zone of Kilauea volcano, Hawaii
An anomalous body with low Vp (compressional wave velocity), low Vs (shear wave velocity), and high Vp/Vs anomalies is observed at 8–11 km depth beneath the upper east rift zone of Kilauea volcano in Hawaii by simultaneous inversion of seismic velocity structure and earthquake locations. We interpret this body to be a crustal magma reservoir beneath the volcanic pile, similar to those widely recog
Authors
Guoqing Lin, Falk Amelung, Yan Lavallee, Paul G. Okubo
Estimating structural collapse fragility of generic building typologies using expert judgment
The structured expert elicitation process proposed by Cooke (1991),
hereafter referred to as Cooke’s approach, is applied for the first time
in the realm of structural collapse-fragility assessment for selected generic
construction types. Cooke’s approach works on the principle of objective
calibration scoring of judgments coupled with hypothesis testing used in classical
statistics. The perf
Authors
Kishor S. Jaiswal, D. J. Wald, D. Perkins, W. P. Aspinall, Anne S. Kiremidjian
Predicting the spatial extent of liquefaction from geospatial and earthquake specific parameters
The spatially extensive damage from the 2010-2011 Christchurch, New Zealand earthquake events are a reminder of the need for liquefaction hazard maps for anticipating damage from future earthquakes. Liquefaction hazard mapping as traditionally relied on detailed geologic mapping and expensive site studies. These traditional techniques are difficult to apply globally for rapid response or loss esti
Authors
Jing Zhu, Laurie G. Baise, Eric M. Thompson, David J. Wald, Keith L. Knudsen
ARkStorm@Tahoe: Stakeholder perspectives on vulnerabilities and preparedness for an extreme storm event in the greater Lake Tahoe, Reno, and Carson City region
Atmospheric rivers (ARs) are strongly linked to extreme winter precipitation events in the Western U.S., accounting for 80 percent of extreme floods in the Sierra Nevada and surrounding lowlands. In 2010, the U.S. Geological Survey developed the ARkStorm extreme storm scenario for California to quantify risks from extreme winter storms and to allow stakeholders to better explore and mitigate poten
Authors
Christine M. Albano, Dale A. Cox, Michael D. Dettinger, Kevin Shaller, Toby L. Welborn, Maureen McCarthy
Seismometer Self-Noise and Measuring Methods
Seismometer self-noise is usually not considered when selecting and using seismic waveform data in scientific research as it is typically assumed that the self-noise is negligibly small compared to seismic signals. However, instrumental noise is part of the noise in any seismic record, and in particular, at frequencies below a few mHz, the instrumental noise has a frequency-dependent character and
Authors
Adam T. Ringler, R. Sleeman, Charles R. Hutt, Lind S. Gee
Development of a portable active long-path differential optical absorption spectroscopy system for volcanic gas measurements
Active long-path differential optical absorption spectroscopy (LP-DOAS) has been an effective tool for measuring atmospheric trace gases for several decades. However, instruments were large, heavy and power-inefficient, making their application to remote environments extremely challenging. Recent developments in fibre-coupling telescope technology and the availability of ultraviolet light emittin
Authors
Fabio Vita, Christoph Kern, Salvatore Inguaggiato
Hillslope-scale experiment demonstrates role of convergence during two-step saturation
Subsurface flow and storage dynamics at hillslope scale are difficult to ascertain, often in part due to a lack of sufficient high-resolution measurements and an incomplete understanding of boundary conditions, soil properties, and other environmental aspects. A continuous and extreme rainfall experiment on an artificial hillslope at Biosphere 2's Landscape Evolution Observatory (LEO) resulted in
Authors
A. I. Gevaert, A. J. Teuling, R. Uijlenhoet, Stephen B. DeLong, T. E. Huxman, L. A. Pangle, David D. Breshears, J. Chorover, John D. Pelletier, S. R. Saleska, X. Zeng, Peter A. Troch