Publications
Filter Total Items: 7241
Observations of rotational motions from local earthquakes using two temporary portable sensors in Waynoka, Oklahoma
Characterizing rotational motions from earthquakes at local distances has the potential to improve earthquake engineering and seismic gradiometry by better characterizing the complete seismic wavefield. Applied Technology Associates (ATA) has developed a proto‐seismic magnetohydrodynamic (SMHD) three‐component rotational rate sensor. We deploy two ATA rotational rate sensors at a temporary aftersh
Authors
Adam T. Ringler, Robert E. Anthony, David C. Wilson, A.A. Holland, C.-J. Lin
Examination of differences between three SPT-based seismic soil liquefaction triggering relationships
The preceding companion paper presented the updating of the seismic soil liquefactiontriggering relationship of Cetin et al. [1], and compared the resulting updated relationship with the earlier version. In this second paper, a detailed cross-comparison is made between three triggering relationships: (1) Seed et al. [2], as slightly updated by the NCEER Working Group (Youd et al. [3]), (2) Boulang
Authors
K. Onder Cetin, Raymond B. Seed, Robert E. Kayen, Robb E. S. Moss, H. Tolga Bilge, Makbule Ilgac, Khaled Chowdhury
Wetland stratigraphic evidence for variable megathrust earthquake rupture modes at the Cascadia subduction zone
Although widespread agreement that the Cascadia subduction zone produces great earthquakes of magnitude 8 to 9 was reached decades ago, debate continues about the rupture lengths, magnitudes, and frequency of megathrust earthquakes recorded by wetland stratigraphy fringing Cascadia’s estuaries. Correlation of such coastal earthquake evidence along the subduction zone has largely relied on relative
Authors
Alan R. Nelson, Robert C. Witter, Simon Englehart, Andrea Hawkers, Benjamin P. Horton
Development of a domestic earthquake alert protocol combining the USGS pager and FEMA Hazus systems
The U.S. Geological Survey’s PAGER automated alert system provides rapid (10-20 min) loss estimates in terms of ranges of fatalities and economic impact for all significant earthquakes around the globe. In contrast, FEMA’s Hazus software, which is currently operated manually by FEMA personnel internally within several hours of any large domestic earthquake, provides more detailed loss information
Authors
David J. Wald, H.A. Seligson, Jesse Rozelle, J. Burns, Kristin Marano, Kishor S. Jaiswal, Mike Hearne, D Bausch
Increasing earthquake insurance coverage in California via parametric hedges
California has the highest earthquake risk of any state in the United States. The Federal Emergency Management Agency (FEMA) reported in 2017 that 73% of the nation’s annual losses to earthquakes were expected to be concentrated in California and the Pacific Northwest. California alone constitutes 61% ($3.7 billion out of an estimated $6.1 billion annual losses nationwide). Despite this overwhelmi
Authors
Guillermo Franco, G Tirabassi, M Lopeman, David J. Wald, W.J. Siembieda
State transportation agencies partner to deploy and enhance ShakeCast
The California Department of Transportation (Caltrans) is organizing and leading a three-year Transportation Pooled Fund (TPF) project, Connecting the Dots: Implementing ShakeCast Across Multiple State Departments of Transportation for Rapid Post-Earthquake Response. Ten state Departments of Transportation (DOT)—CA, ID, MO, MS, OK, OR, SC, TX, UT, AND WA—have partnered and combined research funds
Authors
L. Turner, David J. Wald, Kuo-wan Lin, Brian Chiou, Daniel Slosky
Tidal response of groundwater in a leaky aquifer—Application to Oklahoma
Quantitative interpretation of the tidal response of water levels measured in wells has long been made either with a model for perfectly confined aquifers or with a model for purely unconfined aquifers. However, many aquifers may be neither totally confined nor purely unconfined at the frequencies of tidal loading but behave somewhere between the two end‐members. Here we present a more general mod
Authors
Chi-Yuen Wang, Mai-Linh Doan, Lian Xue, Andrew J. Barbour
Salt marsh loss affects tides and sediment budget in shallow bays
The current paradigm is that salt marshes and their important ecosystem services are threatened by global climate change; indeed, large marsh losses have been documented worldwide. Morphological changes associated with salt marsh erosion are expected to influence the hydrodynamics and sediment dynamics of coastal systems. Here the influence of salt marsh erosion on the tidal hydrodynamics and sedi
Authors
Carmine Donatelli, Neil K. Ganju, Xiaohe Zhang, Sergio Fagherazzi, Nicoletta Leonardi
Induced earthquake and liquefaction hazards in Oklahoma, USA: Constraints from InSAR
Oklahoma experienced three earthquakes of Mw5.0 or greater in 2016: the 13-Feb. Fairview earthquake (Mw5.1), the 03-Sep. Pawnee earthquake (Mw5.8), and the 07-Nov. Cushing earthquake (Mw5.0). These events are the first earthquakes in the state exceeding Mw5.0 since the 2011 Mw5.7 Prague earthquake and likely result from wide-scale deep fluid-injection. We use interferometric synthetic aperture rad
Authors
William D. Barnhart, William L. Yeck, Daniel E. McNamara
A regime shift in sediment export from a coastal watershed during a record wet winter, California: Implications for landscape response to hydroclimatic extremes
Small, steep watersheds are prolific sediment sources from which sediment flux is highly sensitive to climatic changes. Storm intensity and frequency are widely expected to increase during the 21st century, and so assessing the response of small, steep watersheds to extreme rainfall is essential to understanding landscape response to climate change. During record winter rainfall in 2016–2017, the
Authors
Amy E. East, Andrew W. Stevens, Andrew C. Ritchie, Patrick L. Barnard, Pamela L. Campbell‐Swarzenski, Brian D. Collins, Christopher H. Conaway
The San Andreas Fault System--Complexities along a major transform fault system and relation to earthquake hazards
The San Andreas Fault System is a 1300-km-long transform boundary that accommodates motion between the North American and Pacific Plates. New technologies and data reveal rich details about the present configuration of faults, distribution of strain and associated seismic hazard on this complex network of faults. This contribution provides a brief summary of the geologic history of the San Andre
Authors
Katherine Scharer, Ashley Streig
Sensor suite: The Albuquerque Seismological Laboratory Instrumentation Testing Suite
To standardize parameters used in seismometer testing and calibration and to make these algorithms accessible to the seismological community, we have developed a new seismometer testing software package called Albuquerque Seismological Laboratory (ASL) Sensor Test Suite. This software is written in Java and makes use of Seismological Exchange for Earthquake Data (SEED) format. Our goal is not to b
Authors
A. Kearns, Adam T. Ringler, James Holland, Tyler Storm, David C. Wilson, Robert E. Anthony