Publications
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Spectral wave-driven bedload transport across a coral reef flat/lagoon complex
Coral reefs are an important source of sediment for reef-lined coasts by helping to maintain beaches while also providing protection in the form of wave energy dissipation. Understanding the mechanisms by which sediment is delivered to the coast as well as better constraining the total volumes generated are critical for projecting future coastal change. A month-long hydrodynamics and sediment tran
Authors
Kurt J. Rosenberger, Curt D. Storlazzi, Olivia Cheriton, Andrew Pomeroy, Jeff E. Hansen, Ryan Lowe, Mark Buckley
Using a large-n seismic array to explore the robustness of spectral estimations
Spectral analysis is widely used to estimate and refine earthquake source parameters such as source radius, seismic moment, and stress drop. This study aims to quantify the precision of the single spectra and empirical Green's function spectral ratio approach using the Large‐n Seismic Survey in Oklahoma (LASSO) array. The dense station coverage in an area of local saltwater disposal offers a uniqu
Authors
K.B. Kemna, A.F. Pena Castro, R.M. Harrington, Elizabeth S. Cochran
Tall building performance-based seismic design using SCEC broadband platform site-specific ground motion simulations
The scarcity of strong ground motion records presents a challenge for making reliable performance assessments of tall buildings whose seismic design is controlled by large-magnitude and close-distance earthquakes. This challenge can be addressed using broadband ground-motion simulation methods to generate records with site-specific characteristics of large-magnitude events. In this paper, simulate
Authors
Kuanshi Zhong, Ting Lin, Greg Deierlein, Robert Graves, Fabio Silva, Nicolas Luco
Modeling three-dimensional flow over spur-and-groove morphology
Spur-and-groove (SAG) morphology characterizes the fore reef of many coral reefs worldwide. Although the existence and geometrical properties of SAG have been well documented, an understanding of the hydrodynamics over them is limited. Here, the three-dimensional flow patterns over SAG formations, and a sensitivity of those patterns to waves, currents, and SAG geometry were characterized using the
Authors
Renan da Silva, Curt D. Storlazzi, Justin S. Rogers, Johan Reyns, Robert T. McCall
Injection‐induced earthquakes near Milan, Kansas, controlled by Karstic Networks
Induced earthquakes from waste disposal operations in otherwise tectonically stable regions significantly increases seismic hazard. It remains unclear why injections induce large earthquakes on non‐optimally oriented faults kilometers below the injection horizon, particularly since fluids are not injected under pressure, but rather poured, into the well as observed in the Milan, Kansas area. Here
Authors
Charlene Joubert, Reza Sohrabi, Justin Rubinstein, Gunnar Jansen, Stephen A Miller
Localized fault-zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes
Earthquakes produce a spectrum of elastic and inelastic deformation processes that are reflected across various length and time scales. While elasticity has long dominated research assumptions in active tectonics, increasing interest has focused on the inelastic characteristics of earthquakes, particularly those of the surface fault rupture zone itself, and how they relate to ground rupture hazard
Authors
William D. Barnhart, Ryan D. Gold, James Hollingsworth
Seismic reflection imaging of the low-angle Panamint normal fault system, eastern California
Shallowly dipping (<30°) low‐angle normal faults (LANFs) have been documented globally; however, examples of active LANFs in continental settings are limited. The western margin of the Panamint Range in eastern California is defined by a LANF that dips west beneath Panamint Valley and has evidence of Quaternary motion. In addition, high‐angle dextral‐oblique normal faults displace middle to late Q
Authors
Ryan D. Gold, William J. Stephenson, Richard W. Briggs, Christopher DuRoss, Eric Kirby, Edward W Woolery, Jaime Delano, Jackson K. Odum
Identifying the greatest earthquakes of the past 2000 years at the Nehalem River Estuary, Northern Oregon Coast, USA
We infer a history of three great megathrust earthquakes during the past 2000 years at the Nehalem River estuary based on the lateral extent of sharp (≤3 mm) peat-mud stratigraphic contacts in cores and outcrops, coseismic subsidence as interpreted from fossil diatom assemblages and reconstructed with foraminiferal assemblages using a Bayesian transfer function, and regional correlation of 14C-mod
Authors
Alan R. Nelson, Andrea D. Hawkes, Yuki Sawai, Simon E. Engelhart, Robert C. Witter, Wendy C. Grant-Walter, Lee-Ann Bradley, Tina Dura, Niamh Cahill, Benajamin P. Horton
Extraformational sediment recycling on Mars
Extraformational sediment recycling (old sedimentary rock to new sedimentary rock) is a fundamental aspect of Earth’s geological record; tectonism exposes sedimentary rock, whereupon it is weathered and eroded to form new sediment that later becomes lithified. On Mars, tectonism has been minor, but two decades of orbiter instrument–based studies show that some sedimentary rocks previously buried t
Authors
Kenneth S. Edgett, Steven Banham, Kristen A. Bennett, Lauren A. Edgar, Christopher S. Edwards, Alberto Fairen, Christopher M. Fedo, Deirdra M. Fey, James B. Garvin, John P. Grotzinger, Sanjeev Gupta, Marie Henderson, Christopher H House, Nicolas Mangold, Scott McLennan, Horton E. Newsom, Scott Rowland, Kirsten L. Siebach, Lucy Thompson, Scott VanBommel, Roger C. Wiens, Rebecca Williams, Aileen Yingst
VS30 and Dominant Site Frequency (fd) as Provisional Station ML Corrections (dML) in California
New seismic stations added to a regional seismic network cannot be used to calculate local magnitude (ML) until a revised regionwide amplitude decay function is developed. Each station must record a minimum number of local and regional earthquakes that meet specific amplitude requirements prior to recalibration of the amplitude decay function. Station component adjustments (dML; Uhrhammer et a
Authors
Alan Yong, Elizabeth S. Cochran, Jennifer Andrews, Kenneth Hudson, Antony Martin, Ellen Yu, Julie A Herrick, Jessica Dozal
Selecting three components of ground motions from Conditional Spectra for multiple stripe analyses
For complex structures where the seismic response depends appreciably on the vertical (V) component of ground motion (GM) (e.g., base-isolated buildings, long-span bridges, dams, nuclear power plants), incremental dynamic analysis (IDA) is commonly utilized to estimate seismic risk, where the V components of GM are selected and scaled based on the corresponding horizontal (H) components. The resul
Authors
N. Simon Kwong, Kishor S. Jaiswal, Nicolas Luco, J. W. Baker
Proposed AASHTO guidelines for performance-based seismic bridge design
No abstract available.
Authors
Thomas P. Murphy, Lee Marsh, Stuart Bennion, Ian G. Buckle, Nicolas Luco, Donald Anderson, Mervyn Kowalsky, Jose Restrepo