Publications
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Updated California aftershock parameters Updated California aftershock parameters
Reasenberg and Jones (1989) introduced a statistical model for aftershock rate following a mainshock along with estimates of “generic” California parameter values based on past aftershock sequences. The Reasenberg and Jones (1989) model has been used for decades to issue aftershock forecasts following M≥5 mainshocks in California. Here, we update the “generic” parameters for California...
Authors
Jeanne L. Hardebeck, Andrea L. Llenos, Andrew J. Michael, Morgan T. Page, Nicholas van der Elst
The Albuquerque Seismological Lab WWSSN film chip preservation project The Albuquerque Seismological Lab WWSSN film chip preservation project
From 1961 to 1996, the Albuquerque Seismological Laboratory (ASL) installed and operated the World‐Wide Standardized Seismograph Network (WWSSN). Each station within the network consisted of three Benioff short‐period sensors and three Sprengnether Press‐Ewing long‐period sensors along with recording, timing, and calibration equipment. Approximately 3.7 million single‐day record film...
Authors
Alexis Casondra Bianca Alejandro, Charles R. Hutt, Adam T. Ringler, Sabrina Veronica Moore, Robert E. Anthony, David C. Wilson
Erratum to Broadband synthetic seismograms for magnitude 9 earthquakes on the Cascadia megathrust based on 3D simulations and stochastic synthetics, Part 1: methodology and overall results Erratum to Broadband synthetic seismograms for magnitude 9 earthquakes on the Cascadia megathrust based on 3D simulations and stochastic synthetics, Part 1: methodology and overall results
No abstract available.
Authors
Arthur D. Frankel, Erin A. Wirth, Nasser A. Marafi, John Vidale, William J. Stephenson
Global Earthquake Model (GEM) Risk Map Global Earthquake Model (GEM) Risk Map
The Global Earthquake Risk Map (v2018.1) comprises four global maps. The main map presents the geographic distribution of average annual loss (USD) normalized by the average construction costs of the respective country (USD/m2 due to ground shaking in the residential, commercial and industrial building stock, considering contents, structural and non-structural components. The normalized
Authors
V. Silva, D. Amo-Oduro, A. Calderon, J. Dabbeek, V. Despotaki, L. Martins, A. Rao, M. Simionato, D. Vigano, C. Yepes, A. Acevedo, H. Crowley, Nick Horspool, Kishor S. Jaiswal, M. Journeay, M. Pittore
Geomorphic evolution of a gravel‐bed river under sediment‐starved vs. sediment‐rich conditions: River response to the world's largest dam removal Geomorphic evolution of a gravel‐bed river under sediment‐starved vs. sediment‐rich conditions: River response to the world's largest dam removal
Understanding river response to sediment pulses is a fundamental problem in geomorphic process studies, with myriad implications for river management. However, because large sediment pulses are rare and usually unanticipated, they are seldom studied at field scale. We examine fluvial response to a massive (~20 Mt) sediment pulse released by the largest dam removal globally, on the Elwha...
Authors
Amy E. East, Joshua B. Logan, Mark C. Mastin, Andrew C. Ritchie, Jennifer A. Bountry, Christopher S. Magirl, Joel B. Sankey
3-D Simulations of M9 earthquakes on the Cascadia Megathrust: Methodology and results 3-D Simulations of M9 earthquakes on the Cascadia Megathrust: Methodology and results
No abstract available.
Authors
Arthur D. Frankel, Erin Wirth Moriarty, J. Vidale, William J. Stephenson, Nasser A. Marafi
Role of fault gouge during Interaction between hydraulic fracture and a preexisting fracture Role of fault gouge during Interaction between hydraulic fracture and a preexisting fracture
Enhanced reservoir connectivity generally requires maximizing the intersection between hydraulic fracture (HF) and preexisting underground natural fractures (NF), while having the hydraulic fracture continue to propagate across the natural fractures. Observations of downhole core samples suggest that these natural fractures are in fact veins filled with minerals such as calcite (Mighani...
Authors
S. Mighani, David A. Lockner, Brian D. Kilgore, Brian Evans
Quantifying post-wildfire hillslope erosion with lidar Quantifying post-wildfire hillslope erosion with lidar
Following a wildfire, flooding and debris- flow hazards are common and pose a threat to human life and infrastructure in steep burned terrain. Wildfire enhances both water runoff and soil erosion, which ultimately shape the debris flow potential. The erosional processes that route excess sediment from hillslopes to debris-flow channels in recently burned areas, however, are poorly...
Authors
Francis K. Rengers, Luke McGuire
Effects of simulated magnitude 9 earthquake motions on structures in the Pacific Northwest Effects of simulated magnitude 9 earthquake motions on structures in the Pacific Northwest
The Cascadia Subduction Zone (CSZ) produces long-duration, large-magnitude earthquakes that could severely affect structures in the Pacific Northwest (PNW). The impact of synthetic M9.0 CSZ earthquakes on buildings in the Pacific Northwest is studied using eight reinforced concrete wall archetypes that range from 4 to 40 stories. These archetypes were subjected to an ensemble of...
Authors
Nasser A. Marafi, M. Eberhard, J. Berman, Erin A. Wirth, Arthur D. Frankel, J. Vidale
A proposed seismic velocity profile database model A proposed seismic velocity profile database model
We describe the data model that we intend to use in a publicly available site profile database under development for the United States. The initial implementation of the database contains data from California. Currently, our prototype data model consists of JavaScript Object Notation (JSON) format files for storing metadata and data. For a site to be included in the database, the minimum...
Authors
Shamsher Sadiq, Okan Ilkan, Sean K Ahdi, Yousef Bozorgina, Youssef M.A. Hashash, Dong Youp Kwak, Duhee Park, Alan Yong, Jonathan P. Stewart
Serpentinite‐rich gouge in a creeping segment of the Bartlett Springs Fault, northern California: Comparison with SAFOD and implications for seismic hazard Serpentinite‐rich gouge in a creeping segment of the Bartlett Springs Fault, northern California: Comparison with SAFOD and implications for seismic hazard
An exposure of a creeping segment of the Bartlett Springs Fault (BSF), part of the San Andreas Fault system in northern California, is a ~1.5‐m‐wide zone of serpentinite‐bearing fault gouge cutting through Late Pleistocene fluvial deposits. The fault gouge consists of porphyroclasts of antigorite serpentinite, talc, chlorite, and tremolite‐actinolite, along with some Franciscan...
Authors
Diane E. Moore, Robert J. McLaughlin, James J. Lienkaemper
Overview of spirit microscopic imager results Overview of spirit microscopic imager results
This paper provides an overview of Mars Exploration Rover Spirit Microscopic Imager (MI) operations and the calibration, processing, and analysis of MI data. The focus of this overview is on the last five Earth years (2005–2010) of Spirit's mission in Gusev crater, supplementing the previous overview of the first 450 sols of the Spirit MI investigation. Updates to radiometric calibration...
Authors
Kenneth E. Herkenhoff, Steve W Squyres, Raymond E. Arvidson, Shoshanna B Cole, Rob Sullivan, Aileen Yingst, Nathalie Cabrol, Ella Lee, Janet Richie, Robert M. Sucharski, Fred J. Calef, James F. Bell, Mary Chapman, Paul Geissler, Lauren A. Edgar, Brenda Franklin, Joel A. Hurowitz, Elsa Jensen, Jeffrey R. Johnson, Randolph L. Kirk, Peter Lanagan, Kevin Mullins, Craig Leff, Justin Maki, Bonnie L. Redding, Melissa Rice, Michael H. Sims, Annette Sunda, Nicole Spanovich, Richard Springer, Laurence A. Soderblom, Alicia Vaughan