Publications
Filter Total Items: 2057
Inhibition of grain boundary sliding creep in fine-grained ice by inter-granular particles: Implications for planetary ice masses Inhibition of grain boundary sliding creep in fine-grained ice by inter-granular particles: Implications for planetary ice masses
Ice in both terrestrial and planetary settings often contains rock particles. Here we present an experimental investigation of the influence of intergranular particles on the rheological behavior of ice. Experiments were performed on samples fabricated from 10‐μm ice powders +1‐μm graphite or 0.8‐μm alumina particles and subjected to elevated confining pressures. A critical particle...
Authors
Chao Qi, Laura A. Stern, Asmin Pathare, William B. Durham, David L. Goldsby
Do low-cost seismographs perform well enough for your network? An overview of laboratory tests and field observations of the OSOP Raspberry Shake 4D Do low-cost seismographs perform well enough for your network? An overview of laboratory tests and field observations of the OSOP Raspberry Shake 4D
Seismologists have recently begun utilizing low-cost nodal sensors in dense deployments to sample the seismic wavefield at unprecedented spatial resolution. Earthquake Early Warning Systems (EEWS) and other monitoring networks (e.g. wastewater injection) would additionally benefit from network densification; however, current nodal systems lack power systems and/or real-time data...
Authors
Robert E. Anthony, Adam T. Ringler, David C. Wilson, Emily Wolin
Ground motions from the 7 and 19 September, 2017 Tehuantepec and Puebla-Morelos, Mexico, earthquakes Ground motions from the 7 and 19 September, 2017 Tehuantepec and Puebla-Morelos, Mexico, earthquakes
The 2017 M 8.2 Tehuantepec and M 7.1 Puebla‐Morelos earthquakes were deep inslab normal‐faulting events that caused significant damage to several central‐to‐southern regions of Mexico. Inslab earthquakes are an important component of seismicity and seismic hazard in Mexico. Ground‐motion prediction equations (GMPEs) are an integral part of seismic hazard assessment as well as risk and...
Authors
Valerie J. Sahakian, Diego Melgar, Luis Quintanar, Leonardo Ramirez-Guzman, Xyoli Perez-Campos, Annemarie S. Baltay Sundstrom
Development of a geodetic component for the U.S. West Coast Earthquake Early Warning System Development of a geodetic component for the U.S. West Coast Earthquake Early Warning System
An earthquake early warning (EEW) system, ShakeAlert, is under development for the West Coast of the United States. This system currently uses the first few seconds of waveforms recorded by seismic instrumentation to rapidly characterize earthquake magnitude, location, and origin time; ShakeAlert recently added a seismic line source algorithm. For large to great earthquakes, magnitudes...
Authors
Jessica R. Murray, Brendan W. Crowell, R. Grapenthin, Kathleen Hodgkinson, John O. Langbein, Timothy Melbourne, Diego Melgar, Sarah E. Minson, David A. Schmidt
Reported investments in earthquake mitigation top $73 to $80 billion in the San Francisco Bay Area, California, since the 1989 Loma Prieta earthquake Reported investments in earthquake mitigation top $73 to $80 billion in the San Francisco Bay Area, California, since the 1989 Loma Prieta earthquake
The purpose of this report is to provide a compilation of structural retrofits and replacements of older buildings and infrastructure in the San Francisco Bay Area that have either been completed since 1989 or that are in progress as of October 2018. For the purposes of this report, all or parts of nine Bay Area counties were included: Alameda, Contra Costa, Marin, Napa, San Francisco...
Authors
Thomas M. Brocher, Kerri Gefeke, John Boatwright, Keith L. Knudsen
Sources of long-range anthropogenic noise in southern California and implications for tectonic tremor detection Sources of long-range anthropogenic noise in southern California and implications for tectonic tremor detection
We study anthropogenic noise sources seen on seismic recordings along the central section of the San Jacinto fault near Anza, southern California. The strongest signals are caused by freight trains passing through the Coachella Valley north of Anza. Train‐induced transients are observed at distances of up to 50 km from the railway, with durations of up to 20 min, and spectra that are...
Authors
Asaf Inbal, Tudor Cristea-Platon, Jean-Paul Ampuero, Gregor Hillers, Duncan Agnew, Susan E. Hough
Ground motions from the 7 and 19 September 2017 Tehuantepec and Puebla‐Morelos, Mexico, earthquakes Ground motions from the 7 and 19 September 2017 Tehuantepec and Puebla‐Morelos, Mexico, earthquakes
The 2017 M 8.2 Tehuantepec and M 7.1 Puebla‐Morelos earthquakes were deep inslab normal‐faulting events that caused significant damage to several central‐to‐southern regions of Mexico. Inslab earthquakes are an important component of seismicity and seismic hazard in Mexico. Ground‐motion prediction equations (GMPEs) are an integral part of seismic hazard assessment as well as risk and...
Authors
Valerie Jean Sahakian, Diego Melgar Moctezuma, Luis Quintanar, Leonardo Ramirez-Guzman, Xyoli Perez-Campos, Annemarie S. Baltay Sundstrom
Erratum to The 2013–2016 induced earthquakes in Harper and Sumner Counties, southern Kansas Erratum to The 2013–2016 induced earthquakes in Harper and Sumner Counties, southern Kansas
The authors identified two sets of minor errors in the paper by Rubinstein et al. (2018), which are corrected here.
Authors
Justin L. Rubinstein, William L. Ellsworth, Sara L. Dougherty
Interseismic ground deformation and fault slip rates in the greater San Francisco Bay Area from two decades of space geodetic data Interseismic ground deformation and fault slip rates in the greater San Francisco Bay Area from two decades of space geodetic data
The detailed spatial variations of strain accumulation and creep on major faults in the northern San Francisco Bay Area (North Bay), which are important for seismic potential and evaluation of natural hazards, remain poorly understood. Here we combine interferometric synthetic aperture radar data from the ERS‐1/2 and Envisat satellites between 1992 and 2010 with continuous and campaign...
Authors
Wenbin Xu, Songbo Wu, Kathryn Materna, Robert Nadeau, Michael Floyd, Gareth J. Funning, Estelle Chaussard, Christopher W. Johnson, Jessica R. Murray, Xiaoling Ding, Roland Burgmann
A proposed rupture scenario for the 1925 Mw 6.5 Santa Barbara, California, earthquake A proposed rupture scenario for the 1925 Mw 6.5 Santa Barbara, California, earthquake
The 29 June 1925 Santa Barbara earthquake is among the largest 20th century earthquakes in southern California. The earthquake also predated the installation of strong motion and local monitoring instruments in southern California; some instrumental data are, however, available from long-period instruments at regional and teleseismic distances. The current catalog moment magnitude is MW...
Authors
Susan E. Hough, Stacey S. Martin
VS30 at three strong-motion recording stations in Napa and Solano Counties, California — Lovall Valley Road, Broadway Street and Sereno Drive in Vallejo, and Vallejo Fire Station — Calculations determined from S-wave refraction tomography and multichannel VS30 at three strong-motion recording stations in Napa and Solano Counties, California — Lovall Valley Road, Broadway Street and Sereno Drive in Vallejo, and Vallejo Fire Station — Calculations determined from S-wave refraction tomography and multichannel
The August 24, 2014, moment magnitude (Mw) 6.0 South Napa earthquake caused an estimated $400 million in structural damage to the City of Napa, California. In 2015, we acquired high-resolution P- and S-wave seismic data near three strong-motion recording stations in Napa and Solano Counties where high peak ground accelerations (PGAs) were recorded during the South Napa earthquake. In...
Authors
Joanne H. Chan, Rufus D. Catchings, Mark R. Goldman, Coyn J. Criley
VS30 at three strong-motion recording stations in Napa and Napa County, California — Main Street in downtown Napa, Napa fire station number 3, and Kreuzer Lane — Calculations determined from s-wave refraction tomography and multichannel analysis of surfac VS30 at three strong-motion recording stations in Napa and Napa County, California — Main Street in downtown Napa, Napa fire station number 3, and Kreuzer Lane — Calculations determined from s-wave refraction tomography and multichannel analysis of surfac
The August 24, 2014, moment magnitude (Mw) 6.0 South Napa earthquake caused an estimated $400 million in structural damage to the City of Napa, California. In 2015, we acquired high-resolution P- and S-wave seismic data near three strong-motion recording stations in Napa County where high peak ground accelerations (PGAs) were recorded during the South Napa earthquake. In this report, we...
Authors
Joanne H. Chan, Rufus D. Catchings, Mark R. Goldman, Coyn J. Criley