Publications
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Global surface displacement data for assessing variability of displacement at a point on a fault Global surface displacement data for assessing variability of displacement at a point on a fault
This report presents a global dataset of site-specific surface-displacement data on faults. We have compiled estimates of successive displacements attributed to individual earthquakes, mainly paleoearthquakes, at sites where two or more events have been documented, as a basis for analyzing inter-event variability in surface displacement on continental faults. An earlier version of this...
Authors
Suzanne Hecker, Robert Sickler, Leah Feigelson, Norman Abrahamson, Will Hassett, Carla Rosa, Ann Sanquini
Three-dimensional ground-motion simulations of earthquakes for the Hanford area, Washington Three-dimensional ground-motion simulations of earthquakes for the Hanford area, Washington
This report describes the results of ground-motion simulations of earthquakes using three-dimensional (3D) and one-dimensional (1D) crustal models conducted for the probabilistic seismic hazard assessment (PSHA) of the Hanford facility, Washington, under the Senior Seismic Hazard Analysis Committee (SSHAC) guidelines. The first portion of this report demonstrates that the 3D seismic...
Authors
Arthur Frankel, Paul Thorne, Alan Rohay
Response of Global Navigation Satellite System receivers to known shaking between 0.2 and 20 Hertz Response of Global Navigation Satellite System receivers to known shaking between 0.2 and 20 Hertz
Over the past decade, several technological advances have allowed Global Navigation Satellite Systems (GNSS) receivers to have the capability to record displacements at high frequencies, with sampling rates approaching 100 samples per second (sps). In addition, communication and computer hardware and software have allowed various institutions, including the U.S. Geological Survey (USGS)...
Authors
John O. Langbein, John R. Evans, Fredrick Blume, Ingrid Johanson
What do data used to develop ground-motion prediction equations tell us about motions near faults? What do data used to develop ground-motion prediction equations tell us about motions near faults?
A large database of ground motions from shallow earthquakes occurring in active tectonic regions around the world, recently developed in the Pacific Earthquake Engineering Center’s NGA-West2 project, has been used to investigate what such a database can say about the properties and processes of crustal fault zones. There are a relatively small number of near-rupture records, implying...
Authors
David M. Boore
Southern San Andreas Fault evaluation field activity: approaches to measuring small geomorphic offsets--challenges and recommendations for active fault studies Southern San Andreas Fault evaluation field activity: approaches to measuring small geomorphic offsets--challenges and recommendations for active fault studies
In southern California, where fast slip rates and sparse vegetation contribute to crisp expression of faults and microtopography, field and high‐resolution topographic data (
Authors
Katherine M. Scharer, J. Barrett Salisbury, J. Ramon Arrowsmith, Thomas K. Rockwell
Elders recall an earlier tsunami on Indian Ocean shores Elders recall an earlier tsunami on Indian Ocean shores
Ten years on, the Indian Ocean tsunami of 26 December 2004 still looms large in efforts to reduce coastal risk. The disaster has spurred worldwide advances in tsunami detection and warning, tsunami-risk assessment, and tsunami awareness [Satake, 2014]. Nearly a lifetime has passed since the northwestern Indian Ocean last produced a devastating tsunami. Documentation of this tsunami, in...
Authors
Din Mohammad Kakar, Ghazala Naeem, Abdullah Usman, Haider Hasan, Hira Lohdi, Seshachalam Srinivasalu, Vanessa Andrade, C.P. Rajendran, Abdolmajid Naderi Beni, Mohammad Ali Hamzeh, Goesta Hoffmann, Noora Al Balushi, Nora Gale, Ardito Kodijat, Hermann M. Fritz, Brian F. Atwater
Laboratory constraints on models of earthquake recurrence Laboratory constraints on models of earthquake recurrence
In this study, rock friction ‘stick-slip’ experiments are used to develop constraints on models of earthquake recurrence. Constant-rate loading of bare rock surfaces in high quality experiments produces stick-slip recurrence that is periodic at least to second order. When the loading rate is varied, recurrence is approximately inversely proportional to loading rate. These laboratory...
Authors
Nicholas M. Beeler, Terry Tullis, Jenni Junger, Brian D. Kilgore, David L. Goldsby
Key recovery factors for the August 24, 2014, South Napa Earthquake Key recovery factors for the August 24, 2014, South Napa Earthquake
Through discussions between the Federal Emergency Management Agency (FEMA) and the U.S. Geological Survey (USGS) following the South Napa earthquake, it was determined that several key decision points would be faced by FEMA for which additional information should be sought and provided by USGS and its partners. This report addresses the four tasks that were agreed to. These tasks are (1)
Authors
Kenneth W. Hudnut, Thomas M. Brocher, Carol S. Prentice, John Boatwright, Benjamin A. Brooks, Brad T. Aagaard, J. Luke Blair, Jon Peter B. Fletcher, Jemile Erdem, Charles W. Wicks, Jessica R. Murray, Fred F. Pollitz, John O. Langbein, Jerry L. Svarc, David P. Schwartz, Daniel J. Ponti, Suzanne Hecker, Stephen B. DeLong, Carla M. Rosa, Brenda Jones, Rynn M. Lamb, Anne M. Rosinski, Timothy P. McCrink, Timothy E. Dawson, Gordon G. Seitz, Craig Glennie, Darren Hauser, Todd Ericksen, Dan Mardock, Don F. Hoirup, Jonathan D. Bray, Ron S. Rubin
Hillslope-scale experiment demonstrates role of convergence during two-step saturation 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)...
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
Structure and seismic hazard of the Ventura Avenue anticline and Ventura fault, California: Prospect for large, multisegment ruptures in the Western Transverse Ranges Structure and seismic hazard of the Ventura Avenue anticline and Ventura fault, California: Prospect for large, multisegment ruptures in the Western Transverse Ranges
The Ventura Avenue anticline is one of the fastest uplifting structures in southern California, rising at ∼5 mm/yr. We use well data and seismic reflection profiles to show that the anticline is underlain by the Ventura fault, which extends to seismogenic depth. Fault offset increases with depth, implying that the Ventura Avenue anticline is a fault‐propagation fold. A decrease in the...
Authors
Judith Hubbard, John H. Shaw, James F. Dolan, Thomas L. Pratt, Lee J. McAuliffe, Thomas K. Rockwell
CyberShake-derived ground-motion prediction models for the Los Angeles region with application to earthquake early warning CyberShake-derived ground-motion prediction models for the Los Angeles region with application to earthquake early warning
Real-time applications such as earthquake early warning (EEW) typically use empirical ground-motion prediction equations (GMPEs) along with event magnitude and source-to-site distances to estimate expected shaking levels. In this simplified approach, effects due to finite-fault geometry, directivity and site and basin response are often generalized, which may lead to a significant under-...
Authors
Maren Bose, Robert Graves, David Gill, Scott Callaghan, Phillip J. Maechling
A continuous record of intereruption velocity change at Mount St. Helens from coda wave interferometry A continuous record of intereruption velocity change at Mount St. Helens from coda wave interferometry
In September 2004, Mount St. Helens volcano erupted after nearly 18 years of quiescence. However, it is unclear from the limited geophysical observations when or if the magma chamber replenished following the 1980–1986 eruptions in the years before the 2004–2008 extrusive eruption. We use coda wave interferometry with repeating earthquakes to measure small changes in the velocity...
Authors
Alicia J. Hotovec-Ellis, Joan S. Gomberg, John Vidale, Ken C. Creager