Publications
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Prehistoric earthquakes on the Caribbean-South American plate boundary, Central Range Fault, Trinidad
Recent geodetic studies suggest that the Central Range fault is the principal plate-boundary structure accommodating strike-slip motion between the Caribbean and South American plates. Our study shows that the fault forms a topographically prominent lineament in central Trinidad. Results from a paleoseismic investigation at a site where Holocene sediments have been deposited across the Central Ran
Authors
Carol S. Prentice, John C. Weber, Christopher J. Crosby, Daniel Ragona
Tsunami Preparedness in Oregon (video)
Tsunamis are a constant threat to the coasts of our world. Although tsunamis are infrequent along the West coast of the United States, it is possible and necessary to prepare for potential tsunami hazards to minimize loss of life and property. Community awareness programs are important, as they strive to create an informed society by providing education and training.
This video about tsunami p
Authors
Kurt Loeffler, Justine Gesell
Marin Tsunami (video)
Tsunamis are a constant threat to the coasts of our world. Although tsunamis are infrequent along the West coast of the United States, it is possible and necessary to prepare for potential tsunami hazards to minimize loss of life and property. Community awareness programs are important, as they strive to create an informed society by providing education and training.
The Marin coast could be s
Authors
Kurt Loeffler, Justine Gesell
Tsunami Preparedness in Washington (video)
Tsunamis are a constant threat to the coasts of our world. Although tsunamis are infrequent along the West coast of the United States, it is possible and necessary to prepare for potential tsunami hazards to minimize loss of life and property. Community awareness programs are important, as they strive to create an informed society by providing education and training.
This video about tsunami p
Localized damage associated with topographic amplification during the 12 January 2010 M 7.0 Haiti earthquake
Local geological conditions, including both near-surface sedimentary layers1,2,3,4 and topographic features5,6,7,8,9, are known to significantly influence ground motions caused by earthquakes. Microzonation maps use local geological conditions to characterize seismic hazard, but commonly incorporate the effect of only sedimentary layers10,11,12. Microzonation does not take into account local topog
Authors
Susan E. Hough, Jean Robert Altidor, Dieuseul Anglade, Douglas D. Given, Doug Given, M. Guillard Janvier, J. Zebulon Maharrey, Mark E. Meremonte, B. S.-L. Mildor, Claude Prepetit, Alan K. Yong
USGS-WHOI-DPRI Coulomb Stress-Transfer Model for the January 12, 2010, MW=7.0 Haiti Earthquake
Using calculated stress changes to faults surrounding the January 12, 2010, rupture on the Enriquillo Fault, and the current (January 12 to 26, 2010) aftershock productivity, scientists from the U.S. Geological Survey (USGS), Woods Hole Oceanographic Institution (WHOI), and Disaster Prevention Research Institute, Kyoto University (DPRI) have made rough estimates of the chance of a magnitude (Mw)=7
Authors
Jian Lin, Ross S. Stein, Volkan Sevilgen, Shinji Toda
Supraslab earthquake clusters above the subduction plate boundary offshore Sanriku, northeastern Japan: Seismogenesis in a graveyard of detached seamounts?
Thousands of offshore repeating earthquakes with low‐angle thrust focal mechanisms occur along the subduction plate boundary of NE Japan. Double‐difference relocation methods using P‐ and S‐wave arrivals reveal clusters of events above these repeating events. To assure good depth control we restrict our study to events that are close to seismic stations. These “supraslab” earthquake clusters are r
Authors
Naoki Uchida, Stephen H. Kirby, Tomomi Okada, Ryota Hino, Akira Hasegawa
Guidelines for Standardized Testing of Broadband Seismometers and Accelerometers
Testing and specification of seismic and earthquake-engineering sensors and recorders has been marked by significant variations in procedures and selected parameters. These variations cause difficulty in comparing such specifications and test results.
In July 1989, and again in May 2005, the U.S. Geological Survey hosted international pub-lic/private workshops with the goal of defining widely acc
Authors
Charles R. Hutt, John R. Evans, Fred Followill, Robert L. Nigbor, Erhard Wielandt
Oscillating load-induced acoustic emission in laboratory experiment
Spatial and temporal patterns of acoustic emission (AE) were studied. A pre-fractured cylinder of granite was loaded in a triaxial machine at 160 MPa confining pressure until stick-slip events occurred. The experiments were conducted at a constant strain rate of 10−7 s−1 that was modulated by small-amplitude sinusoidal oscillations with periods of 175 and 570 seconds. Amplitude of the oscillations
Authors
Alexander Ponomarev, David A. Lockner, S. Stroganova, S. Stanchits, V. Smirnov
Workshop targets development of geodetic transient detection methods: 2009 SCEC Annual Meeting: Workshop on transient anomalous strain detection; Palm Springs, California, 12-13 September 2009
The Southern California Earthquake Center (SCEC) is a community of researchers at institutions worldwide working to improve understanding of earthquakes and mitigate earthquake risk. One of SCEC's priority objectives is to “develop a geodetic network processing system that will detect anomalous strain transients.” Given the growing number of continuously recording geodetic networks consisting of h
Authors
Jessica R. Murray-Moraleda, Rowena Lohman
Determination of stress parameters for eight well-recorded earthquakes in eastern North America
We determined the stress parameter, Δσ, for the eight earthquakes studied by Atkinson and Boore (2006), using an updated dataset and a revised point-source stochastic model that captures the effect of a finite fault. We consider four geometrical-spreading functions, ranging from 1/R at all distances to two- or three-part functions. The Δσ values are sensitive to the rate of geometrical spreading a
Authors
D. M. Boore, K.W. Campbell, G. M. Atkinson
OMG earthquake! can twitter improve earthquake response?
[No abstract available]
Authors
P. Earle, M. Guy, R. Buckmaster, C. Ostrum, S. Horvath, A. Vaughan