Publications
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Combining multiple earthquake models in real time for earthquake early warning
The ultimate goal of earthquake early warning (EEW) is to provide local shaking information to users before the strong shaking from an earthquake reaches their location. This is accomplished by operating one or more real‐time analyses that attempt to predict shaking intensity, often by estimating the earthquake’s location and magnitude and then predicting the ground motion from that point source.
Authors
Sarah E. Minson, Stephen Wu, James L Beck, Thomas H. Heaton
Effects of deep basins on structural collapse during large subduction earthquakes
Deep sedimentary basins are known to increase the intensity of ground motions, but this effect is implicitly considered in seismic hazard maps used in U.S. building codes. The basin amplification of ground motions from subduction earthquakes is particularly important in the Pacific Northwest, where the hazard at long periods is dominated by such earthquakes. This paper evaluates the effects of bas
Authors
Nasser A. Marafi, Marc O. Eberhard, Jeffrey W. Berman, Erin A. Wirth, Arthur Frankel
Connecting crustal seismicity and earthquake-driven stress evolution in Southern California
Tectonic stress in the crust evolves during a seismic cycle, with slow stress accumulation over interseismic periods, episodic stress steps at the time of earthquakes, and transient stress readjustment during a postseismic period that may last months to years. Static stress transfer to surrounding faults has been well documented to alter regional seismicity rates over both short and long time scal
Authors
Fred Pollitz, Camilla Cattania
Uncertainty, variability, and earthquake physics in ground‐motion prediction equations
Residuals between ground‐motion data and ground‐motion prediction equations (GMPEs) can be decomposed into terms representing earthquake source, path, and site effects. These terms can be cast in terms of repeatable (epistemic) residuals and the random (aleatory) components. Identifying the repeatable residuals leads to a GMPE with reduced uncertainty for a specific source, site, or path location,
Authors
Annemarie S. Baltay, Thomas C. Hanks, Norm A. Abrahamson
NEHRP turns 40
This year, the National Earthquake Hazards Reduction Program (NEHRP) turns 40, four decades since the Earthquake Hazards Reduction Act of 1977 was enacted establishing the Program, spurring numerous federal, state, and community actions to reduce earthquake losses in the U.S.A. and its territories and setting a standard for earthquake loss‐reduction projects internationally. Four agencies are part
Authors
William S. Leith
Study of responses of 64-story Rincon Building to Napa, Fremont, Piedmont, San Ramon earthquakes and ambient motions
We analyze the recorded responses of a 64-story, instrumented, concrete core shear wall building in San Francisco, California, equipped with tuned sloshing liquid dampers (TSDs) and buckling restraining braces (BRBs). Previously, only ambient data from the 72-channel array in the building were studied (Çelebi et al. 2013). Recently, the 24 August 2014 Mw 6.0 Napa and three other earthquakes were r
Authors
Mehmet Çelebi, John Hooper, Ron Klemencic
High-resolution seismic profiling reveals faulting associated with the 1934 Ms 6.6 Hansel Valley earthquake (Utah, USA)
The 1934 Ms 6.6 Hansel Valley, Utah, earthquake produced an 8-km-long by 3-km-wide zone of north-south−trending surface deformation in an extensional basin within the easternmost Basin and Range Province. Less than 0.5 m of purely vertical displacement was measured at the surface, although seismologic data suggest mostly strike-slip faulting at depth. Characterization of the origin and kinematics
Authors
Pier Paolo G. Bruno, Christopher DuRoss, Sotirios Kokkalas
Holocene surface-faulting earthquakes at the Spring Lake and North Creek Sites on the Wasatch Fault Zone: Evidence for complex rupture of the Nephi Segment
The Nephi segment of the Wasatch fault zone (WFZ) comprises two fault strands, the northern and southern strands, which have evidence of recurrent late Holocene surface-faulting earthquakes. We excavated paleoseismic trenches across these strands to refine and expand their Holocene earthquake chronologies; improve estimates of earthquake recurrence, displacement, and fault slip rate; and assess wh
Authors
Christopher DuRoss, Michael D. Hylland, Adam Hiscock, Stephen Personius, Richard W. Briggs, Ryan D. Gold, Gregg Beukelman, Geg N McDonald, Ben Erickson, Adam McKean, Steve Angster, Roselyn King, Anthony J. Crone, Shannon A. Mahan
The transition from frictional sliding to shear melting in laboratory stick-slip experiments
No abstract available
Authors
David A. Lockner, Brian D. Kilgore, Nicholas M. Beeler, Diane E. Moore
Alternative rupture-scaling relationships for subduction interface and other offshore environments
Alternative fault-rupture-scaling relationships are developed for Mw 7.1–
9.5 subduction interface earthquakes using a new database of consistently derived finitefault
rupture models from teleseismic inversion. Scaling relationships are derived for
rupture area, rupture length, rupture width, maximum slip, and average slip. These relationships
apply width saturation for large-magnitude interface e
Authors
Trevor Allen, Gavin P. Hayes
Adjusting central and eastern North America ground-motion intensity measures between sites with different reference-rock site conditions
Adjustment factors are provided for converting ground‐motion intensity measures between central and eastern North America (CENA) sites with different reference‐rock site conditions (VS30=760, 2000, and 3000 m/s) for moment magnitudes ranging from 2 to 8, rupture distances ranging from 2 to 1200 km, Fourier amplitude spectra (FAS) for frequencies ranging from 0.01 to 100 Hz, response spectra for p
Authors
David Boore, Kenneth W. Campbell
Limiting the effects of earthquakes on gravitational-wave interferometers
Ground-based gravitational wave interferometers such as the Laser Interferometer Gravitational-wave Observatory (LIGO) are susceptible to ground shaking from high-magnitude teleseismic events, which can interrupt their operation in science mode and significantly reduce their duty cycle. It can take several hours for a detector to stabilize enough to return to its nominal state for scientific obser
Authors
Michael Coughlin, Paul S. Earle, Jan Harms, Sebastien Biscans, Christopher Buchanan, Eric Coughlin, Fred Donovan, Jeremy Fee, Hunter Gabbard, Michelle Guy, Nikhil Mukund, Matthew Perry