Publications
Scientific reports, journal articles, and information products produced by USGS Pacific Coastal and Marine Science Center scientists.
Filter Total Items: 1339
Does littoral sand bypass the head of Mugu Submarine Canyon? - a modeling study
A newly developed sand-tracer code for the process-based model Delft3D (Deltares, The Netherlands) was used to simulate the littoral transport near the head of the Mugu Submarine Canyon in California, USA. For westerly swells, which account for more than 90% of the wave conditions in the region, the sand tracers in the downcoast littoral drift were unable to bypass the canyon head. A flow converge
Authors
Jingping Xu, Edwin Elias, Nicole Kinsman
A numerical model investigation of the formation and persistence of an erosion hotspot
A Delft3D-SWAN coupled flow and wave model was constructed for the San Francisco Bight with high-resolution at 7 km-long Ocean Beach, a high-energy beach located immediately south of the Golden Gate, the sole entrance to San Francisco Bay. The model was used to investigate tidal and wave-induced flows, basic forcing terms, and potential sediment transport in an area in the southern portion of Ocea
Authors
Jeff E. Hansen, Edwin Elias, Jeffrey H. List, Patrick L. Barnard
Paleoceanograpic changes on the Farallon Escarpment off central California during the last 16,000 years
No abstract available.
Authors
Mary McGann
Isostatic gravity map of the Point Sur 30' x 60' quadrangle and adjacent areas, California
This isostatic residual gravity map is part of a regional effort to investigate the tectonics and water resources of the central Coast Range. This map serves as a basis for modeling the shape of basins and for determining the location and geometry of faults in the area. Local spatial variations in the Earth's gravity field (after removing variations caused by instrument drift, earth-tides, latitud
Authors
J. T. Watt, R. L. Morin, V. E. Langenheim
Flow speed estimated by inverse modeling of sandy sediment deposited by the 29 September 2009 tsunami near Satitoa, east Upolu, Samoa
Sandy deposits from the 29 September 2009 tsunami on the east coast of Upolu, Samoa were investigated to document their characteristics and used to apply an inverse sediment transport model to estimate tsunami flow speed. Sandy deposits 6 to 15 cm thick formed from ~ 25 to ~ 250 m inland. Sedimentary layers in the deposits, that are defined by vertical grain size variation and contacts, are interp
Authors
Bruce E. Jaffe, Mark Buckley, Bruce M. Richmond, Luke Strotz, Samuel Etienne, Kate Clark, Steve Watt, Guy R. Gelfenbaum, James Goff
More than 100 Years of Background-Level Sedimentary Metals, Nisqually River Delta, South Puget Sound, Washington
The Nisqually River Delta is located about 25 km south of the Tacoma Narrows in the southern reach of Puget Sound. Delta evolution is controlled by sedimentation from the Nisqually River and erosion by strong tidal currents that may reach 0.95 m/s in the Nisqually Reach. The Nisqually River flows 116 km from the Cascade Range, including the slopes of Mount Rainier, through glacially carved valleys
Authors
Renee K. Takesue, Peter W. Swarzenski
Insights on the 2009 South Pacific tsunami in Samoa and Tonga from field surveys and numerical simulations
An Mw ≈ 8.1 earthquake south of the Samoan Islands on 29 September 2009 generated a tsunami that killed 189 people. From 4 to 11 October, an International Tsunami Survey Team surveyed the seven major islands of the Samoan archipelago. The team measured locally focused runup heights of 17 m at Poloa and inundation of more than 500 m at Pago Pago. A follow-up expedition from 23 to 28 November survey
Authors
Hermann M. Fritz, José C. Borrero, Costas E. Synolakis, Emile A. Okal, Robert Weiss, Vasily V. Titov, Bruce E. Jaffe, Spyros Foteinis, Patrick J. Lynett, I-Chi Chan, Philip L-F. Liu
Petroleum hydrocarbons in sediment from the northern Gulf of Mexico shoreline, Texas to Florida
Petroleum hydrocarbons were extracted and analyzed from shoreline sediment collected from the northern Gulf of Mexico (nGOM) coastline that could potentially be impacted by Macondo-1 (M-1) well oil. Sediment was collected before M-1 well oil made significant local landfall and analyzed for baseline conditions by a suite of diagnostic petroleum biomarkers. Oil residue in trace quantities was detect
Authors
Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas, Florence L. Wong
Book review: Rogue waves in the ocean
Rogue Waves in the Ocean (2009) is a follow-on text to Extreme Ocean Waves (2008) edited by Pelinovsky and Kharif, both published by Springer. Unlike the earlier text, which is a compilation of papers on a variety of extreme waves that was the subject of a scientific conference in 2007, Rogues Waves in the Ocean is written, rather than edited, by Kharif, Pelinovsky, and Slunyaev and is focused on
Authors
Eric L. Geist
Overview of the ARkStorm scenario
The U.S. Geological Survey, Multi Hazards Demonstration Project (MHDP) uses hazards science to improve resiliency of communities to natural disasters including earthquakes, tsunamis, wildfires, landslides, floods and coastal erosion. The project engages emergency planners, businesses, universities, government agencies, and others in preparing for major natural disasters. The project also helps to
Authors
Keith Porter, Anne Wein, Charles N. Alpers, Allan Baez, Patrick L. Barnard, James Carter, Alessandra Corsi, James Costner, Dale Cox, Tapash Das, Mike Dettinger, James Done, Charles Eadie, Marcia Eymann, Justin Ferris, Prasad Gunturi, Mimi Hughes, Robert Jarrett, Laurie Johnson, Hanh Dam Le-Griffin, David Mitchell, Suzette Morman, Paul Neiman, Anna Olsen, Suzanne Perry, Geoffrey Plumlee, Martin Ralph, David Reynolds, Adam Rose, Kathleen Schaefer, Julie Serakos, William Siembieda, Jonathan D. Stock, David Strong, Ian Sue Wing, Alex Tang, Pete Thomas, Ken Topping, Chris Wills, Lucile Jones
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Earthquake Hazards Program, Science Application for Risk Reduction, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center, Big Sur Landslides, Reducing Risk, San Francisco Bay and Sacramento-San Joaquin Delta Estuary
Chapter 50 Geology and tectonic development of the Amerasia and Canada Basins, Arctic Ocean
Amerasia Basin is the product of two phases of counterclockwise rotational opening about a pole in the lower Mackenzie Valley of NW Canada. Phase 1 opening brought ocean–continent transition crust (serpentinized peridotite?) to near the seafloor of the proto-Amerasia Basin, created detachment on the Eskimo Lakes Fault Zone of the Canadian Arctic margin and thinned the continental crust between the
Authors
Arthur Grantz, Patrick E. Hart, Vicki A Childers
New insights of tsunami hazard from the 2011 Tohoku-oki event
We report initial results from our recent field survey documenting the inundation and resultant deposits of the 2011 Tohoku-oki tsunami from Sendai Plain, Japan. The tsunami inundated up to 4.5 km inland but the > 0.5 cm-thick sand deposit extended only 2.8 km (62% of the inundation distance). The deposit however continued as a mud layer to the inundation limit. The mud deposit contained high conc
Authors
K. Goto, C. Chague-Goff, S. Fujino, J. Goff, Bruce Jaffe, Y. Nishimura, Bruce M. Richmond, D. Sugawara, Witold Szczucinski, D.R. Tappin, Robert C. Witter, E. Yulianto