Publications
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Characterizing ground motions that collapse steel special moment-resisting frames or make them unrepairable
This work applies 64,765 simulated seismic ground motions to four models each of 6- or 20-story, steel special moment-resisting frame buildings. We consider two vector intensity measures and categorize the building response as “collapsed,” “unrepairable,” or “repairable.” We then propose regression models to predict the building responses from the intensity measures. The best models for “collapse”
Authors
Anna H. Olsen, Thomas H. Heaton, John F. Hall
Structure of the Koyna-Warna Seismic Zone, Maharashtra, India: A possible model for large induced earthquakes elsewhere
The Koyna-Warna area of India is one of the best worldwide examples of reservoir-induced seismicity, with the distinction of having generated the largest known induced earthquake (M6.3 on 10 December 1967) and persistent moderate-magnitude (>M5) events for nearly 50 years. Yet, the fault structure and tectonic setting that has accommodated the induced seismicity is poorly known, in part because th
Authors
Rufus D. Catchings, M.M. Dixit, Mark R. Goldman, S. Kumar
Focused exhumation along megathrust splay faults in Prince William Sound, Alaska
Megathrust splay faults are a common feature of accretionary prisms and can be important for generating tsunamis during some subduction zone earthquakes. Here we provide new evidence from Alaska that megathrust splay faults have been conduits for focused exhumation in the last 5 Ma. In most of central Prince William Sound, published and new low-temperature thermochronology data indicate little to
Authors
Peter J. Haeussler, Phillip A Armstrong, Lee M Liberty, Kelly M Ferguson, Shaun P Finn, Jeannette C Arkle, Thomas L. Pratt
Incorporating induced seismicity in the 2014 United States National Seismic Hazard Model: results of the 2014 workshop and sensitivity studies
The U.S. Geological Survey National Seismic Hazard Model for the conterminous United States was updated in 2014 to account for new methods, input models, and data necessary for assessing the seismic ground shaking hazard from natural (tectonic) earthquakes. The U.S. Geological Survey National Seismic Hazard Model project uses probabilistic seismic hazard analysis to quantify the rate of exceedance
Authors
Mark D. Petersen, Charles S. Mueller, Morgan P. Moschetti, Susan M. Hoover, Justin L. Rubinstein, Andrea L. Llenos, Andrew J. Michael, William L. Ellsworth, Arthur F. McGarr, Austin A. Holland, John G. Anderson
Physical abrasion of mafic minerals and basalt grains: application to Martian aeolian deposits
Sediment maturity, or the mineralogical and physical characterization of sediment deposits, has been used to locate sediment source, transport medium and distance, weathering processes, and paleoenvironments on Earth. Mature terrestrial sands are dominated by quartz, which is abundant in source lithologies on Earth and is physically and chemically stable under a wide range of conditions. Immature
Authors
Carin Cornwall, Joshua L. Bandfield, Timothy N. Titus, B. C. Schreiber, D. R. Montgomery
ChemCam results from the Shaler outcrop in Gale crater, Mars
The ChemCam campaign at the fluvial sedimentary outcrop “Shaler” resulted in observations of 28 non-soil targets, 26 of which included active laser induced breakdown spectroscopy (LIBS), and all of which included Remote Micro-Imager (RMI) images. The Shaler outcrop can be divided into seven facies based on grain size, texture, color, resistance to erosion, and sedimentary structures. The ChemCam o
Authors
Ryan B. Anderson, J.C. Bridges, A. Williams, L. Edgar, A. Ollila, J. Williams, Marion Nachon, N. Mangold, M. Fisk, J. Schieber, S. Gupta, G. Dromart, R. Wiens, Stéphane Le Mouélic, O. Forni, N. Lanza, Alissa Mezzacappa, V. Sautter, D. Blaney, B. Clark, S. Clegg, O. Gasnault, J. Lasue, Richard Léveillé, E. Lewin, K.W. Lewis, S. Maurice, H. Newsom, S.P. Schwenzer, D. Vaniman
Near-surface versus fault zone damage following the 1999 Chi-Chi earthquake: Observation and simulation of repeating earthquakes
We observe crustal damage and its subsequent recovery caused by the 1999 M7.6 Chi-Chi earthquake in central Taiwan. Analysis of repeating earthquakes in Hualien region, ~70 km east of the Chi-Chi earthquake, shows a remarkable change in wave propagation beginning in the year 2000, revealing damage within the fault zone and distributed across the near surface. We use moving window cross correlation
Authors
Kate Huihsuan Chen, Takashi Furumura, Justin L. Rubinstein
A sea-level database for the Pacific coast of central North America
A database of published and new relative sea-level (RSL) data for the past 16 ka constrains the sea-level histories of the Pacific coast of central North America (southern British Columbia to central California). Our reevaluation of the stratigraphic context and radiocarbon age of sea-level indicators from geological and archaeological investigations yields 600 sea-level index points and 241 sea-l
Authors
Simon E. Engelhart, Matteo Vacchi, Benjamin P. Horton, Alan R. Nelson, Robert E. Kopp
A tribute to George Plafker
In a long and distinguished career, George Plafker made fundamental advances in understanding of megathrust tectonics, tsunami generation, paleoseismology, crustal neotectonics, and Alaskan geology, chiefly by means of geological field observations. George discovered that giant earthquakes result from tens of meters of seismic slip on subduction megathrusts, and he did this before the theory of pl
Authors
Gary S. Fuis, Peter J. Haeussler, Brian F. Atwater
Coastal evidence for Holocene subduction-zone earthquakes and tsunamis in central Chile
The ∼500-year historical record of seismicity along the central Chile coast (30–34°S) is characterized by a series of ∼M 8.0–8.5 earthquakes followed by low tsunamis (<4 m) occurring on the megathrust about every 80 years. One exception is the AD 1730 great earthquake (M 9.0–9.5) and high tsunami (>10 m), but the frequency of such large events is unknown. We extend the seismic history of central C
Authors
Tina Dure, Marco Cisternas, Benjamin Horton, Lisa Ely, Alan R. Nelson, Robert L. Wesson, Jessica Pilarczyk
Cryovolcanism in the outer solar system
Cryovolcanism is defined as the extrusion of liquids and vapors of materials that would be frozen solid at the planetary surface temperatures of the icy bodies of the outer solar system. Active cryovolcanism is now known to occur on Saturn's moon Enceladus and on Neptune's moon Triton and is suspected on Jupiter's moon Europa, while evidence for past cryovolcanic activity is widespread throughout
Authors
Paul E. Geissler
Proceedings of the 9th U.S.-Japan natural resources panel for earthquake research
Introduction
The UJNR Panel on Earthquake Research promotes advanced study toward a more fundamental understanding of the earthquake process and hazard estimation. The Ninth Joint meeting was extremely beneficial in furthering cooperation and deepening understanding of problems common to both the U.S. and Japan. The meeting included productive exchanges of information on approaches to systematic o