Publications
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Evidence for slip partitioning and bimodal slip behavior on a single fault: Surface slip characteristics of the 2013 Mw7.7 Balochistan, Pakistan earthquake Evidence for slip partitioning and bimodal slip behavior on a single fault: Surface slip characteristics of the 2013 Mw7.7 Balochistan, Pakistan earthquake
Deformation is commonly accommodated by strain partitioning on multiple, independent strike-slip and dip-slip faults in continental settings of oblique plate convergence. As a corollary, individual faults tend to exhibit one sense of slip – normal, reverse, or strike-slip – until whole-scale changes in boundary conditions reactivate preexisting faults in a new deformation regime. In this...
Authors
William D. Barnhart, Richard W. Briggs, Nadine G. Reitman, Ryan D. Gold, Gavin P. Hayes
Understanding the signature of rock coatings in laser-induced breakdown spectroscopy data Understanding the signature of rock coatings in laser-induced breakdown spectroscopy data
Surface compositional features on rocks such as coatings and weathering rinds provide important information about past aqueous environments and water–rock interactions. The search for these features represents an important aspect of the Curiosity rover mission. With its unique ability to do fine-scale chemical depth profiling, the ChemCam laser-induced breakdown spectroscopy instrument...
Authors
Nina L. Lanza, Ann M. Ollila, Agnes Cousin, Roger C. Wiens, Samuel M. Clegg, Nicolas Mangold, Nathan Bridges, Daniel Cooper, Mariek E. Schmidt, Jeffrey Berger, Raymond E. Arvidson, Noureddine Melikechi, Horton E. Newsom, Robert Tokar, Craig Hardgrove, Alissa Mezzacappa, Ryan S. Jackson, Benton C. Clark, Olivier Forni, Sylvestre Maurice, Marion Nachon, Ryan B. Anderson, Jennifer Blank, Matthew Deans, Dorothea Delapp, Richard Léveillé, Rhonda McInroy, Ronald Martinez, Pierre-Yves Meslin, Patrick Pinet
Thin‐ or thick‐skinned faulting in the Yakima fold and thrust belt (WA)? Constraints from kinematic modeling of the saddle mountains anticline Thin‐ or thick‐skinned faulting in the Yakima fold and thrust belt (WA)? Constraints from kinematic modeling of the saddle mountains anticline
The Yakima fold and thrust belt (YFTB) deforms the Columbia River Basalt Group flows of Washington State. The YFTB fault geometries and slip rates are crucial parameters for seismic‐hazard assessments of nearby dams and nuclear facilities, yet there are competing models for the subsurface fault geometry involving shallowly rooted versus deeply rooted fault systems. The YFTB is also...
Authors
Gabriele Casale, Thomas L. Pratt
How to build and teach with QuakeCaster: an earthquake demonstration and exploration tool How to build and teach with QuakeCaster: an earthquake demonstration and exploration tool
QuakeCaster is an interactive, hands-on teaching model that simulates earthquakes and their interactions along a plate-boundary fault. QuakeCaster contains the minimum number of physical processes needed to demonstrate most observable earthquake features. A winch to steadily reel in a line simulates the steady plate tectonic motions far from the plate boundaries. A granite slider in...
Authors
Kelsey Linton, Ross S. Stein
Rapid damage mapping for the 2015 M7.8 Gorkha earthquake using synthetic aperture radar data from COSMO-SkyMed and ALOS-2 satellites Rapid damage mapping for the 2015 M7.8 Gorkha earthquake using synthetic aperture radar data from COSMO-SkyMed and ALOS-2 satellites
The 25 April 2015 Mw 7.8 Gorkha earthquake caused more than 8000 fatalities and widespread building damage in central Nepal. The Italian Space Agency’s COSMO–SkyMed Synthetic Aperture Radar (SAR) satellite acquired data over Kathmandu area four days after the earthquake and the Japan Aerospace Exploration Agency’s Advanced Land Observing Satellite-2 SAR satellite for larger area nine...
Authors
Sang-Ho Yun, Kenneth W. Hudnut, Susan Owen, Frank Webb, Mark Simons, Patrizia Sacco, Eric Gurrola, Gerald Manipon, Cunren Liang, Eric Fielding, Pietro Milillo, Hook Hua, Alessandro Coletta
U.S. States and Territories National Tsunami Hazard Assessment: Historical record and sources for waves – Update U.S. States and Territories National Tsunami Hazard Assessment: Historical record and sources for waves – Update
The first U.S. Tsunami Hazard Assessment (Dunbar and Weaver, 2008) was prepared at the request of the National Tsunami Hazard Mitigation Program (NTHMP). The NTHMP is a partnership formed between federal and state agencies to reduce the impact of tsunamis through hazard assessment, warning guidance, and mitigation. The assessment was conducted in response to a 2005 joint report by the...
Authors
Paula K. Dunbar, Craig S. Weaver
Geologic setting of the proposed Fallon FORGE Site, Nevada: Suitability for EGS research and development Geologic setting of the proposed Fallon FORGE Site, Nevada: Suitability for EGS research and development
The proposed Fallon FORGE site lies within and adjacent to the Naval Air Station Fallon (NASF) directly southeast of the town of Fallon, Nevada, within the large basin of the Carson Sink in west-central Nevada. The site is located on two parcels that include land owned by the NASF and leased and owned by Ormat Nevada, Inc. The Carson Sink in the vicinity of the Fallon site is covered by...
Authors
James E. Faulds, Douglas Blankenship, Nicholas H. Hinz, Andrew Sabin, Josh Nordquist, Stephen H. Hickman, Jonathan M.G. Glen, Mack Kennedy, Drew Siler, Ann Robinson-Tait, Colin F. Williams, Peter Drakos, Wendy M. Calvin
Modifications to risk-targeted seismic design maps for subduction and near-fault hazards Modifications to risk-targeted seismic design maps for subduction and near-fault hazards
ASCE 7-10 introduced new seismic design maps that define risk-targeted ground motions such that buildings designed according to these maps will have 1% chance of collapse in 50 years. These maps were developed by iterative risk calculation, wherein a generic building collapse fragility curve is convolved with the U.S. Geological Survey hazard curve until target risk criteria are met...
Authors
Abbie B. Liel, Nico Luco, Meera Raghunandan, C. Champion
Analysis and selection of magnitude relations for the Working Group on Utah Earthquake Probabilities Analysis and selection of magnitude relations for the Working Group on Utah Earthquake Probabilities
Prior to calculating time-independent and -dependent earthquake probabilities for faults in the Wasatch Front region, the Working Group on Utah Earthquake Probabilities (WGUEP) updated a seismic-source model for the region (Wong and others, 2014) and evaluated 19 historical regressions on earthquake magnitude (M). These regressions relate M to fault parameters for historical surface...
Authors
Christopher B. DuRoss, Susan Olig, David Schwartz
Numerical modeling of injection, stress and permeability enhancement during shear stimulation at the Desert Peak Enhanced Geothermal System Numerical modeling of injection, stress and permeability enhancement during shear stimulation at the Desert Peak Enhanced Geothermal System
Creation of an Enhanced Geothermal System relies on stimulation of fracture permeability through self-propping shear failure that creates a complex fracture network with high surface area for efficient heat transfer. In 2010, shear stimulation was carried out in well 27-15 at Desert Peak geothermal field, Nevada, by injecting cold water at pressure less than the minimum principal stress...
Authors
David Dempsey, Sharad Kelkar, Nick Davatzes, Stephen H. Hickman, Daniel Moos
Slip-pulse rupture behavior on a 2 meter granite fault Slip-pulse rupture behavior on a 2 meter granite fault
We describe observations of dynamic rupture events that spontaneously arise on meter-scale laboratory earthquake experiments. While low-frequency slip of the granite sample occurs in a relatively uniform and crack-like manner, instruments capable of detecting high frequency motions show that some parts of the fault slip abruptly (velocity >100 mm∙s-1, acceleration >20 km∙s-2) while the...
Authors
Gregory C. McLaskey, Brian D. Kilgore, Nicholas M. Beeler
Astronomical observations of volatiles on asteroids Astronomical observations of volatiles on asteroids
We have long known that water and hydroxyl are important components in meteorites and asteroids. However, in the time since the publication of Asteroids III, evolution of astronomical instrumentation, laboratory capabilities, and theoretical models have led to great advances in our understanding of H2O/OH on small bodies, and spacecraft observations of the Moon and Vesta have important
Authors
Andrew S. Rivkin, Humberto Campins, Joshua P. Emery, Ellen S. Howell, Javier Licandro, Driss Takir, Faith Vilas