Publications
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Clustering of velocities in a GPS network spanning the Sierra Nevada Block, the northern Walker Lane Belt, and the Central Nevada Seismic Belt, California-Nevada
The deformation across the Sierra Nevada Block, the Walker Lane Belt, and the Central Nevada Seismic Belt (CNSB) between 38.5°N and 40.5°N has been analyzed by clustering GPS velocities to identify coherent blocks. Cluster analysis determines the number of clusters required and assigns the GPS stations to the proper clusters. The clusters are shown on a fault map by symbols located at the position
Authors
James C. Savage, Robert W. Simpson
A record of large earthquakes during the past two millennia on the southern Green Valley Fault, California
We document evidence for surface-rupturing earthquakes (events) at two trench sites on the southern Green Valley fault, California (SGVF). The 75-80-km long dextral SGVF creeps ~1-4 mm/yr. We identify stratigraphic horizons disrupted by upward-flowering shears and in-filled fissures unlikely to have formed from creep alone. The Mason Rd site exhibits four events from ~1013 CE to the Present. The L
Authors
James J. Lienkaemper, John N. Baldwin, Robert Turner, Robert R. Sickler, Johnathan Brown
Mobile laser scanning applied to the earth sciences
Lidar (light detection and ranging), a method by which the precise time of flight of emitted pulses of laser energy is measured and converted to distance for reflective targets, has helped scientists make topographic maps of Earth's surface at scales as fine as centimeters. These maps have allowed the discovery and analysis of myriad otherwise unstudied features, such as fault scarps, river channe
Authors
Benjamin A. Brooks, Craig Glennie, Kenneth W. Hudnut, Todd Ericksen, Darren Hauser
Reverberations on the watery element: A significant tsunamigenic historical earthquake offshore the Carolina coast
We investigate an early nineteenth-century earthquake that has
been previously cataloged but not previously investigated in
detail or recognized as a significant event. The earthquake
struck at approximately 4:30 a.m. LT on 8 January 1817 and
was widely felt throughout the southeastern and mid-Atlantic
United States. Around 11:00 a.m. the same day, an eyewitness
described a 12-inch tide that rose
Authors
Susan E. Hough, Jeffrey Munsey, Steven N. Ward
Effects of error covariance structure on estimation of model averaging weights and predictive performance
When conducting model averaging for assessing groundwater conceptual model uncertainty, the averaging weights are often evaluated using model selection criteria such as AIC, AICc, BIC, and KIC (Akaike Information Criterion, Corrected Akaike Information Criterion, Bayesian Information Criterion, and Kashyap Information Criterion, respectively). However, this method often leads to an unrealistic sit
Authors
Dan Lu, Ming Ye, Philip D. Meyer, Gary P. Curtis, Xiaoqing Shi, Xu-Feng Niu, Steve B. Yabusaki
The 2011 Mw 7.1 Van (Eastern Turkey) earthquake
We use interferometric synthetic aperture radar (InSAR), body wave seismology, satellite imagery, and field observations to constrain the fault parameters of the Mw 7.1 2011 Van (Eastern Turkey) reverse-slip earthquake, in the Turkish-Iranian plateau. Distributed slip models from elastic dislocation modeling of the InSAR surface displacements from ENVISAT and COSMO-SkyMed interferograms indicate u
Authors
John R. Elliot, Alex C. Copley, R. Holley, Katherine M. Scharer, Barry Parsons
Infrequent triggering of tremor along the San Jacinto Fault near Anza, California
We examine the conditions necessary to trigger tremor along the San Jacinto fault (SJF) near Anza, California, where previous studies suggest triggered tremor occurs, but observations are sparse. We investigate the stress required to trigger tremor using continuous broadband seismograms from 11 stations located near Anza, California. We examine 44 Mw≥7.4 teleseismic events between 2001 and 2011; t
Authors
Tien-Huei Wang, Elizabeth S. Cochran, Duncan Carr Agnew, David D. Oglesby
Refinement of late-Early and Middle Miocene diatom biostratigraphy for the east coast of the United States
Integrated Ocean Drilling Program (IODP) Expedition 313 continuously cored Lower to Middle Miocene sequences at three continental shelf sites off New Jersey, USA. The most seaward of these, Site M29, contains a well-preserved Early and Middle Miocene succession of planktonic diatoms that have been independently correlated with the geomagnetic polarity time scale derived in studies from the equator
Authors
John A. Barron, James Browning, Peter Sugarman, Kenneth G. Miller
The uses and limitations of the square‐root‐impedance method for computing site amplification
The square‐root‐impedance (SRI) method is a fast way of computing approximate site amplification that does not depend on the details from velocity models. The SRI method underestimates the peak response of models with large impedance contrasts near their base, but the amplifications for those models is often close to or equal to the root mean square of the theoretical full resonant (FR) response o
Authors
David Boore
Reappraisal of the relationship between the northern Nevada rift and Miocene extension in the northern Basin and Range Province
The northern Nevada rift is a prominent mafic dike swarm and magnetic anomaly in north-central Nevada inferred to record the Middle Miocene (16.5-15.0 Ma) extension direction in the northern Basin and Range province in the western United States. From the 245°-250° rift direction, Basin and Range extension is inferred to have shifted 45° clockwise to a modern direction of 290°-300° during the late
Authors
Joseph Colgan
Potentially induced earthquakes in Oklahoma, USA: links between wastewater injection and the 2011 Mw 5.7 earthquake sequence
Significant earthquakes are increasingly occurring within the continental interior of the United States, including five of moment magnitude (Mw) ≥ 5.0 in 2011 alone. Concurrently, the volume of fluid injected into the subsurface related to the production of unconventional resources continues to rise. Here we identify the largest earthquake potentially related to injection, an Mw 5.7 earthquake in
Authors
Katie M. Keranen, Heather M. Savage, Geoffrey A. Abers, Elizabeth S. Cochran
Geometry and earthquake potential of the shoreline fault, central California
The Shoreline fault is a vertical strike‐slip fault running along the coastline near San Luis Obispo, California. Much is unknown about the Shoreline fault, including its slip rate and the details of its geometry. Here, I study the geometry of the Shoreline fault at seismogenic depth, as well as the adjacent section of the offshore Hosgri fault, using seismicity relocations and earthquake focal me
Authors
Jeanne L. Hardebeck