Publications
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Quantitative risk of earthquake disruption to global copper and rhenium supply
Earthquakes have the potential to substantially affect mining operations, potentially leading to supply chain disruptions and adversely affecting the global economy. This study explores the quantification of earthquake risk to copper and rhenium commodity supply by examining the spatial concentration of high earthquake hazard areas and the commodity-specific mining, smelting, and...
Authors
Kishor S. Jaiswal, Nico Luco, Emily K. Schnebele, Nedal T. Nassar, Donya Otarod
Aftershock forecasting
Aftershocks can compound the impacts of a major earthquake, disrupting recovery efforts and potentially further damaging weakened buildings and infrastructure. Forecasts of the probability of aftershocks can therefore aid decision-making during earthquake response and recovery. Several countries issue authoritative aftershock forecasts. Most aftershock forecasts are based on simple...
Authors
Jeanne L. Hardebeck, Andrea L. Llenos, Andrew J. Michael, Morgan T. Page, Max Schneider, Nicholas van der Elst
Collision structures of the Prince William terrane and Chugach terrane docking along the Shumagin and Unimak convergent margins, Alaska, USA
Western Alaska’s convergent margins are composed of tectonostratigraphic terranes. On land, terrane assembly is recognized along boundaries or sutures between neighboring geologic elements with distinctly different origins. In marine areas where rock outcrops are covered by sediment, recognizing terrane sutures is problematic. A fault in seismic dip line 5 of the ALEUT project has been...
Authors
Roland E. von Huene, John J. Miller
Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays
Seismic boundaries caused by phase transitions between olivine polymorphs in Earth's mantle provide thermal and compositional markers that inform mantle dynamics. Seismic studies of the mantle transition zone often use either global averaging with sparse arrays or regional sampling from a single dense array. The intermediate approach of this study utilizes many densely spaced seismic...
Authors
Margaret Elizabeth Glasgow, Hankui K. Zhang, Brandon Schmandt, Wen-Yi Zhou, Jinchi Zhang
Debris avalanches in the northern California Coast Range triggered by plate boundary earthquakes
Determining the timing and cause for ancient hillslope failures proves difficult in the western United States, yet critical as it ties directly into groundmotion estimates for hazardous events. This knowledge gap is important to confront as hillslope failures are candidates to be triggered by earthquakes along active plate boundaries. We identify two prehistoric, i.e., preinstrumental...
Authors
Jessie K. Pearl, Harvey Kelsey, Stephen J. Angster, Dylan Caldwell, Ian Pryor, Brian Sherrod
Slip rate for the Rose Canyon fault through San Diego, California, based on analysis of GPS data: Evidence for a potential Rose Canyon–San Miguel-Vallecitos fault connection?
The Rose Canyon fault is the southern extension of the larger Newport–Inglewood–Rose Canyon fault system, which represents a major structural boundary in the Inner Continental Borderland (ICB) offshore of southern California. Ten to fifteen percent of total plate boundary motion in southern California is thought to be accommodated by the faults of the ICB, but the exact distribution of...
Authors
Drake Moore Singleton, Jillian Maloney, Duncan Agnew, Thomas Rockwell
The 17 January 1994 Northridge, California, earthquake: A retrospective analysis
The 17 January 1994 Northridge, California, earthquake was a watershed event, with far-reaching societal and scientific impacts. The earthquake, which occurred in the early days of both broadband seismic networks and the Internet, spurred advances in seismic monitoring, real-time systems, and development of data products. Motivated by the 30th anniversary of the earthquake, we present a...
Authors
Susan E. Hough, Robert Graves, Elizabeth S. Cochran, Clara Yoon, James Luke Blair, Scott Haefner, David J. Wald, Vince Quitoriano
Upper crustal seismic velocity structure of the Hayward fault zone, San Francisco Bay, California, USA: Results from the 2016 East Bay Seismic Experiment (EBSI-16)
We developed Vp, Vs, Vp/Vs ratio, and Poisson’s ratio models of the uppermost crust (
Authors
Rufus D. Catchings, Luther M. Strayer, Joanne H. Chan, Mark Goldman, Andrian T. McEvilly, John Suppe
Earthquake effects surveyed during the nineteenth century as ecological features of Chinookan tidelands
Lasting effects of a Cascadia earthquake in 1700 were documented during surveys of Chinookan tidelands near the mouth of the Columbia River between 1805 and 1868. The effects resemble estuarine consequences, near Anchorage, of the 1964 Alaska earthquake: fatal drowning of subsided meadows and forests by post-earthquake tides, rebirth of marshes and forests through post-earthquake...
Authors
Brian F. Atwater, David K. Yamaguchi, Jessie K. Pearl
Turbidite correlation for paleoseismology
Marine turbidite paleoseismology relies on the assumption of synchronous triggering of turbidity currents by earthquake shaking to infer rupture extent and recurrence. Such inference commonly depends on age dating and correlation of the physical stratigraphy of deposits carried by turbidity currents (i.e., turbidites) across great distances. Along the Cascadia subduction zone, which lies...
Authors
Nora M. Nieminski, Zoltan Sylvester, Jake Covault, Joan S. Gomberg, Lydia M. Staisch, Ian McBrearty
Relatively stable pressure effects and time-increasing thermal contraction control Heber geothermal field deformation
Due to geological complexities and observational gaps, it is challenging to identify the governing physical processes of geothermal field deformation including ground subsidence and earthquakes. In the west and east regions of the Heber Geothermal Field (HGF), decade-long subsidence was occurring despite injection of heat-depleted brines, along with transient reversals between uplift and...
Authors
Guoyan Jiang, Andrew Barbour, Robert John Skoumal, Kathryn Zerbe Materna, Aren Crandall-Bear
Uncertainty in ground-motion-to-intensity conversions significantly affects earthquake early warning alert regions
We examine how the choice of ground‐motion‐to‐intensity conversion equations (GMICEs) in earthquake early warning (EEW) systems affects resulting alert regions. We find that existing GMICEs can underestimate observed shaking at short rupture distances or overestimate the extent of low‐intensity shaking. Updated GMICEs that remove these biases would improve the accuracy of alert regions...
Authors
Jessie Saunders, Annemarie S. Baltay Sundstrom, Sarah E. Minson, Maren Böse