Publications
Filter Total Items: 2057
Revised technical implementation plan for the ShakeAlert system—An earthquake early warning system for the West Coast of the United States 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...
Authors
Douglas D. Given, Richard M. Allen, Annemarie S. Baltay Sundstrom, 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
Tidal response of groundwater in a leaky aquifer—Application to Oklahoma 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...
Authors
Chi-Yuen Wang, Mai-Linh Doan, Lian Xu, Andrew J. Barbour
The San Andreas Fault System--Complexities along a major transform fault system and relation to earthquake hazards 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...
Authors
Katherine M. Scharer, Ashley Streig
Karachi tides during the 1945 Makran tsunami Karachi tides during the 1945 Makran tsunami
This paper extends and detides a Karachi tide-gauge record as an observational basis for assessing Indian Ocean tsunami risk. The extended marigram encompasses the time of the great 1945 Makran earthquake of early November 28, local time, and of the ensuing tsunami, which continued into November 29. The marigram was published previously as a 9-h excerpt that begins 1 h after the...
Authors
Loyce M. Adams, Brian F. Atwater, Haider Hasan
2018 report on incorporating sedimentary basin response into the design of tall buildings in Seattle, Washington 2018 report on incorporating sedimentary basin response into the design of tall buildings in Seattle, Washington
On March 22, 2018, the Seattle Department of Construction and Inspections (SDCI) and the U.S. Geological Survey (USGS) convened a workshop of engineers and seismologists to provide guidance on incorporating sedimentary basin response into the design of tall buildings in Seattle. This workshop provided recommendations that build on those from a March 2013 workshop (Chang and others, 2014)
Authors
Erin A. Wirth, Susan W. Chang, Arthur D. Frankel
Using tectonic tremor to constrain seismic‐wave attenuation in Cascadia Using tectonic tremor to constrain seismic‐wave attenuation in Cascadia
Tectonic tremor can be used to constrain seismic‐wave attenuation for use in ground‐motion prediction equations (GMPEs) in regions where moderately sized earthquakes occur infrequently. Here we quantify seismic‐wave attenuation by inverting tremor ground motion amplitudes in different frequency bands of interest, to determine frequency dependence of and spatial variations in seismic‐wave
Authors
Geena F. Littel, Amanda M. Thomas, Annemarie S. Baltay Sundstrom
A digital elevation model for simulating the 1945 Makran tsunami in Karachi Harbour A digital elevation model for simulating the 1945 Makran tsunami in Karachi Harbour
The digital elevation model documented here provides a tool for calibrating tsunami models to effects of the 1945 Makran tsunami that were observed in Karachi Harbour. The DEM bathymetry is derived from soundings made mainly during the first 8 years post-tsunami. While deficient in its portrayal of interior tidelands and upland topography, the DEM accurately represents the setting of a...
Authors
Haider Hasan, Brian F. Atwater, Shoaib Ahmed
Lessons from Mexico’s earthquake early warning system Lessons from Mexico’s earthquake early warning system
The devastating 2017 Puebla quake provides an opportunity to assess how citizens perceive and use the Mexico City earthquake early warning system.
Authors
Richard M. Allen, Elizabeth S. Cochran, Thomas J. Huggins, Scott Miles, Diego Otegui
Quantifying uncertainty in cumulative surface slip along the Cucamonga Fault, a crustal thrust fault in southern California Quantifying uncertainty in cumulative surface slip along the Cucamonga Fault, a crustal thrust fault in southern California
Studies of historic earthquake ground surface ruptures show that displacements along strike are spatially variable. As a result, latest Quaternary slip rates developed from a spatially restricted set of cumulative displacement measurements may not accurately represent fault velocity. Here we examine the uncertainties associated with slip on the Cucamonga Fault, which is part of a network...
Authors
Devin McPhillips, Katherine M. Scharer
The 1952 Kern County, California earthquake: A case study of issues in the analysis of historical intensity data for estimation of source parameters The 1952 Kern County, California earthquake: A case study of issues in the analysis of historical intensity data for estimation of source parameters
Seismic intensity data based on first-hand accounts of shaking give valuable insight into historical and early instrumental earthquakes. Comparing an observed intensity distribution to intensity-prediction models based on modern calibration events allows the magnitude to be estimated for many historic earthquakes. Magnitude estimates can also potentially be refined for earthquakes for...
Authors
Leah Salditch, Susan E. Hough, Seth Stein, Bruce Spencer, Edward Brooks, James S. Neely, Madeleine C. Lucas
The 19 September 2017 M 7.1 Puebla‐Morelos earthquake: Spectral ratios confirm Mexico City zoning The 19 September 2017 M 7.1 Puebla‐Morelos earthquake: Spectral ratios confirm Mexico City zoning
One important element of understanding basin response to strong shaking is the analysis of spectral ratios, which may provide information about the dominant frequency of ground motion at specific locations. Spectral ratios computed from accelerations recorded by strong‐motion stations in Mexico City during the mainshock of the 19 September 2017 MM 7.1 Puebla‐Morelos earthquake reveal...
Authors
Mehmet Celebi, Valerie Jean Sahakian, Diego Melgar, Luis Quintanar
KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: measurements, pressure dependence and pore-fluid effects KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 1: measurements, pressure dependence and pore-fluid effects
Measuring the permeability of tight rocks remains a challenging task. In addition to the traditional sources of errors that affect more permeable formations (e.g. sample selection, non-representative specimens, disturbance introduced during sample acquisition and preparation), tight rocks can be particularly prone to solid–fluid interactions and thus more sensitive to the methods...
Authors
Christian David, J. Wasserman, F. Amann, David A. Lockner, E.H. Rutter, T Vanorio, A. Amann Hildenbrand, J. Billiotte, T. Reuschle, D. Lasseux, J. Fortin, R. Lenormand, A.P.S. Selvadurai, P.G. Meredith, J. Browning, T.M. Mitchell, D. Loggia, F. Nono, J. Sarout, L. Esteban, C. Davy, L. Louis, G. Boitnott, C. Madonna, E. Jahns, Fleury. M., G. Berthe, P. Delage, P. Braun, D. Gregoire, L. Perrier, P. Polito, Y. Jannot, A. Sommier, B. Krooss, R. Fink, Q. Hu, J.M. Klaver, A. Clark