Publications
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Near-surface environmentally forced changes in the Ross Ice Shelf observed with ambient seismic noise
Continuous seismic observations across the Ross Ice Shelf reveal ubiquitous ambient res-
onances at frequencies >5 Hz. These firn-trapped surface wave signals arise through wind
and snow bedform interactions coupled with very low velocity structures. Progressive and long-term spectral changes are associated with surface snow redistribution by wind
and with a January 2016 regional melt event. Mo
Authors
J. Chaput, R. C. Aster, D. McGrath, M.G.W. Baker, Robert E. Anthony, P. Gerstoft, P. Bromirski, A. Nyblade, R.A. Stephen, D. Wiens
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
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 GPS data to
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
Floor-fractured craters on Ceres and implications for interior processes
Several of the impact craters on Ceres have sets of fractures on their floors. These fractures appear similar to those found within a class of lunar craters referred to as floor-fractured craters (FFCs). We have cataloged the Ceres FFCs according to the classification scheme designed for the Moon. An analysis of the depth to diameter ratio for Ceres craters shows that, like lunar FFCs, the Ceres F
Authors
Debra L. Buczkowski, Hanna G. Sizemore, Michael T. Bland, Jennifer E. C. Scully, Lynnae C. Quick, Kynan H. G. Hughson, Ryan S. Park, F. Preusker, Carol A. Raymond, Christopher T. Russell
SPT-based probabilistic and deterministic assessment of seismic soil liquefaction triggering hazard
This study serves as an update to the Cetin et al. (2000, 2004) [1,2] databases and presents new liquefaction triggering curves. Compared with these studies from over a decade ago, the resulting new Standard Penetration Test (SPT)-based triggering curves have shifted to slightly higher CSR-levels for a given N1,60,CS for values of N1,60,CS greater than 15 blows/ft, but the correlation curves remai
Authors
K. Onder Cetin, Raymond B. Seed, Armen Der Kiureghian, Robert Kayen, Robb E. S. Moss, H. Tolga Bilge, M. Ilgac, S.M. Chowdhury, Kohji Tokimatsu
Mineralization at oceanic transform faults and fracture zones
Mineral formation in the modern oceans can take place over millions of years as a result precipitation from ambient ocean water, or orders of magnitude more rapidly from hydrothermal activity related to magmatic and tectonic processes. Here, we review associations between transform faults and related fracture zones and marine minerals. We define marine transform faults as strike-slip or oblique fa
Authors
Amy Gartman, James R. Hein
Improving earthquake rupture forecasts using California as a guide
This article discusses ways in which earthquake rupture forecast models might be improved. Because changes are most easily described in the context of specific models, the third Uniform California Earthquake Rupture Forecast (UCERF3) and its presumed successor, UCERF4, is used as a basis for discussion. Virtually all of the issues and possible improvements discussed are nevertheless general and sh
Authors
Edward H. Field
Holocene surface rupture history of an active forearc fault redefines seismic hazard in Southwestern British Columbia, Canada
Characterizing the hazard associated with Quaternary‐active faults in the forearc crust of the northern Cascadia subduction zone has proven challenging due to historically low rates of seismicity, late Quaternary glacial scouring, and dense vegetation that often obscures fault‐related geomorphic features. We couple lidar topography with paleoseismic trenching across the Leech River Fault on southe
Authors
K. D. Morell, C. Regalla, C. Amos, S. Bennett, L. Leonard, A. Graham, T. Reedy, V. Levson, A. Telka
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 this report,
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
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 present re
Authors
Joanne H. Chan, Rufus D. Catchings, Mark R. Goldman, Coyn J. Criley
2018 hurricane and wildfire supplemental funding: USGS recovery activities
The Additional Supplemental Appropriations for Disaster Relief Requirements Act, 2018 (P.L. 115-123), was signed by the President on February 9, 2018. This funding provided $42.2 million to the U.S. Geological Survey (USGS) for equipment repair and replacement, high-resolution elevation data collection in both hurricane- and wildfire-impacted areas, and scientific studies and assessments that will
Authors
Jo Ellen Hinck, Joseph Stachyra
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Columbia Environmental Research Center, Pacific Coastal and Marine Science Center, Supplemental Appropriations for Disaster Recovery Activities, Hurricane Harvey, Hurricane Irma, Hurricane Maria, Wildland Fire Science
Revised technical implementation plan for the ShakeAlert system—An earthquake early warning system for the West Coast of the United States
The U.S. Geological Survey (USGS), along with partner organizations, has developed an earthquake early warning (EEW) system called ShakeAlert for the highest risk areas of the United States: namely, California, Oregon, and Washington. The purpose of the system is to reduce the impact of earthquakes and save lives and property by providing alerts to institutional users and the public. Using network
Authors
Doug Given, Richard M. Allen, Annemarie S. Baltay, Paul Bodin, Elizabeth S. Cochran, Kenneth Creager, Robert M. de Groot, Lind S. Gee, Egill Hauksson, Thomas H. Heaton, Margaret Hellweg, Jessica R. Murray, Valerie I. Thomas, Douglas Toomey, Thomas S. Yelin