Publications
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A semi-empirical model for the estimation of maximum horizontal displacement due to liquefaction-induced lateral spreading A semi-empirical model for the estimation of maximum horizontal displacement due to liquefaction-induced lateral spreading
During the 1906 San Francisco Earthquake, liquefaction-induced lateral spreading and resultant ground displacements damaged bridges, buried utilities, and lifelines, conventional structures, and other developed works. This paper presents an improved engineering tool for the prediction of maximum displacement due to liquefaction-induced lateral spreading. A semi-empirical approach is...
Authors
Allison T. Faris, Raymond B. Seed, Robert E. Kayen, Jiaer Wu
Guided to gather: toy plane upgraded with telemetry Guided to gather: toy plane upgraded with telemetry
GPS/INS and infrared optical sensors propel USGS's transformation of a remote-controlled one-quarter scale recreational aircraft into a low-cost unmanned aerial vehicle designed for environmental particulate collection.
Authors
Vanessa Wiese, Dana Wiese
Sri Lanka field survey after the December 2004 Indian Ocean tsunami Sri Lanka field survey after the December 2004 Indian Ocean tsunami
An International Tsunami Survey Team (ITST) consisting of scientists from the United States, New Zealand, and Sri Lanka evaluated the impacts of the 26 December 2004 transoceanic tsunami in Sri Lanka two weeks after the event. Tsunami runup height, inundation distance, morphological changes, and sedimentary characteristics of deposits were recorded and analyzed along the southwest and...
Authors
James Goff, Philip L-F. Liu, Bretwood Higman, Robert Morton, Bruce E. Jaffe, Haindra Fernando, Patrick Lynett, Hermann Fritz, Costas Synolakis, Starin Fernando
Sedimentary processes in modern and ancient oceanic arc settings: evidence from the Jurassic Talkeetna Formation of Alaska and the Mariana and Tonga Arcs, western Pacific Sedimentary processes in modern and ancient oceanic arc settings: evidence from the Jurassic Talkeetna Formation of Alaska and the Mariana and Tonga Arcs, western Pacific
Sediment deposited around oceanic volcanic ares potentially provides the most complete record of the tectonic and geochemical evolution of active margins. The use of such tectonic and geochemical records requires an accurate understanding of sedimentary dynamics in an arc setting: processes of deposition and reworking that affect the degree to which sediments represent the...
Authors
Amy E. Draut, Peter D. Clift
Tsunami: wave of change Tsunami: wave of change
No abstract available.
Authors
Eric L. Geist, Vasily V. Titov, Costas E. Synolakis
Revisiting Frazier's subdeltas: enhancing datasets with dimensionality, better to understand geologic systems Revisiting Frazier's subdeltas: enhancing datasets with dimensionality, better to understand geologic systems
Scientific knowledge from the past century is commonly represented by two-dimensional figures and graphs, as presented in manuscripts and maps. Using today's computer technology, this information can be extracted and projected into three- and four-dimensional perspectives. Computer models can be applied to datasets to provide additional insight into complex spatial and temporal systems...
Authors
James Flocks
Integration of coral reef ecosystem process studies and remote sensing Integration of coral reef ecosystem process studies and remote sensing
Worldwide, local-scale anthropogenic stress combined with global climate change is driving shifts in the state of reef benthic communities from coral-rich to micro- or macroalgal-dominated (Knowlton, 1992; Done, 1999). Such phase shifts in reef benthic communities may be either abrupt or gradual, and case studies from diverse ocean basins demonstrate that recovery, while uncertain...
Authors
John Brook, Kimberly Yates, Robert Halley
Assessing massive flank collapse at stratovolcanoes using 3-D slope stability analysis Assessing massive flank collapse at stratovolcanoes using 3-D slope stability analysis
Massive rock failures pose one of the greatest hazards at stratovolcanoes; more than 20,000 fatalities have resulted worldwide from historical volcano edifice collapses. Although numerous processes can destabilize an edifice, gravitational instability is strongly influenced by the interplay of topography, variable potential failure surfaces, and the three-dimensional (3-D) distributions...
Authors
Mark E. Reid, Dianne Brien
Overview of the Spirit Mars Exploration Rover mission to Gusev Crater: Landing site to Backstay Rock in the Columbia Hills Overview of the Spirit Mars Exploration Rover mission to Gusev Crater: Landing site to Backstay Rock in the Columbia Hills
Spirit landed on the floor of Gusev Crater and conducted initial operations on soil‐covered, rock‐strewn cratered plains underlain by olivine‐bearing basalts. Plains surface rocks are covered by wind‐blown dust and show evidence for surface enrichment of soluble species as vein and void‐filling materials and coatings. The surface enrichment is the result of a minor amount of transport...
Authors
R. E. Arvidson, S. W. Squyres, R. C. Anderson, J. F. Bell, D. Blaney, J. Bruckner, N.A. Cabrol, W. M. Calvin, M. H. Carr, P. R. Christensen, B. C. Clark, L. Crumpler, D. J. Des Marais, P.A. De Souza, C. D'Uston, T. Economou, J. Farmer, W. H. Farrand, W. Folkner, M. Golombek, S. Gorevan, J. A. Grant, R. Greeley, J. Grotzinger, E. Guinness, B.C. Hahn, L. Haskin, Kenneth E. Herkenhoff, J.A. Hurowitz, S. Hviid, J. R. Johnson, G. Klingelhoefer, A. H. Knoll, G. Landis, C. Leff, M. Lemmon, R. Li, M.B. Madsen, M.C. Malin, S. M. McLennan, H.Y. McSween, D. W. Ming, J. Moersch, R.V. Morris, T. Parker, J. W. Rice, L. Richter, R. Rieder, D.S. Rodionov, C. Schroder, M. Sims, M. Smith, P. Smith, Laurence A. Soderblom, R. Sullivan, S.D. Thompson, N.J. Tosca, A. Wang, H. Wänke, J. Ward, T. Wdowiak, M. Wolff, A. Yen
Remnant damage from the 1906 San Francisco earthquake Remnant damage from the 1906 San Francisco earthquake
This field trip consists of two stops at locations where it is possible to see damage from the 1906 earthquake and to gauge the intensity of the ground shaking that caused the damage. The first stop is at a cemetery in Colma, where the damage to monuments and headstones was photographed and roughly quantified in the Report of the State Earthquake Investigation Commission, Lawson (1908)...
Authors
John Boatwright
A field guide to the central, creeping section of the San Andreas fault and the San Andreas Fault Observatory at Depth A field guide to the central, creeping section of the San Andreas fault and the San Andreas Fault Observatory at Depth
This field trip is along the central section of the San Andreas fault and consists of eight stops that illustrate surface evidence of faulting, in general, and features associated with active fault creep, in particular. Fault creep is slippage along a fault that occurs either in association with small-magnitude earthquakes or without any associated large-magnitude earthquakes. Another...
Authors
Michael J. Rymer, Stephen H. Hickman, Philip W. Stoffer
Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana
The timing, magnitude, and rate of wetland loss were described for five wetland-loss hotspots in the Terrebonne Basin of the Mississippi River delta plain. Land and water areas were mapped for 34 dates between 1956 and 2004 from historical National Wetlands Inventory (NWI) datasets, aerial photographs, and Landsat Thematic Mapper (TM) satellite images. Since 1956, the emergent land area...
Authors
Julie Bernier, Robert A. Morton, John A. Barras