Publications
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Test of a method to calculate near-bank velocity and boundary shear stress Test of a method to calculate near-bank velocity and boundary shear stress
No abstract available.
Authors
Jason W. Kean, Roger A. Kuhnle, J. Dungan Smith, Carlos V. Alonso, Eddy J. Langendoen
The increasing wildfire and post-fire debris-flow threat in western USA, and implications for consequences of climate change The increasing wildfire and post-fire debris-flow threat in western USA, and implications for consequences of climate change
In southern California and the intermountain west of the USA, debris flows generated from recently-burned basins pose significant hazards. Increases in the frequency and size of wildfires throughout the western USA can be attributed to increases in the number of fire ignitions, fire suppression practices, and climatic influences. Increased urbanization throughout the western USA...
Authors
Susan H. Cannon, Jerry DeGraff
Developing framework to constrain the geometry of the seismic rupture plane on subduction interfaces a priori - A probabilistic approach Developing framework to constrain the geometry of the seismic rupture plane on subduction interfaces a priori - A probabilistic approach
A key step in many earthquake source inversions requires knowledge of the geometry of the fault surface on which the earthquake occurred. Our knowledge of this surface is often uncertain, however, and as a result fault geometry misinterpretation can map into significant error in the final temporal and spatial slip patterns of these inversions. Relying solely on an initial hypocentre and...
Authors
G.P. Hayes, D.J. Wald
Geomagnetic observations on tristan da cunha, south atlantic ocean Geomagnetic observations on tristan da cunha, south atlantic ocean
Few geomagnetic ground observations exist of the Earth's strongest core field anomaly, the South Atlantic Anomaly (SAA). The geomagnetic repeat station on the island Tristan da Cunha, located half-way between South Africa and South America at 37?? 05' S, 12?? 18' W, is therefore of crucial importance. We have conducted several sets of repeat station measurements during magnetically quiet
Authors
J. Matzka, N. Olsen, C.F. Maule, L.W. Pedersen, A.M. Berarducci, S. Macmillan
Morphology of late Quaternary submarine landslides along the U.S. Atlantic continental margin Morphology of late Quaternary submarine landslides along the U.S. Atlantic continental margin
The nearly complete coverage of the U.S. Atlantic continental slope and rise by multibeam bathymetry and backscatter imagery provides an opportunity to reevaluate the distribution of submarine landslides along the margin and reassess the controls on their formation. Landslides can be divided into two categories based on their source areas: those sourced in submarine canyons and those...
Authors
D.C. Twichell, J.D. Chaytor, Uri S. ten Brink, B. Buczkowski
Toward a comprehensive areal model of earthquake-induced landslides Toward a comprehensive areal model of earthquake-induced landslides
This paper provides a review of regional-scale modeling of earthquake-induced landslide hazard with respect to the needs for disaster risk reduction and sustainable development. Based on this review, it sets out important research themes and suggests computing with words (CW), a methodology that includes fuzzy logic systems, as a fruitful modeling methodology for addressing many of these...
Authors
S.B. Miles, D. K. Keefer
Revised Dst and the epicycles of magnetic disturbance: 1958-2007 Revised Dst and the epicycles of magnetic disturbance: 1958-2007
A revised version of the storm-time disturbance index Dst is calculated using hourly-mean magnetic-observatory data from four standard observatories and collected over the years 1958-2007. The calculation algorithm is a revision of that established by Sugiura et al., and which is now used by the Kyoto World Data Center for routine production of Dst. The most important new development is...
Authors
J.J. Love, J.L. Gannon
New research and tools lead to improved earthquake alerting protocols New research and tools lead to improved earthquake alerting protocols
What’s the best way to get alerted about the occurrence and potential impact of an earthquake? The answer to that question has changed dramatically of late, in part due to improvements in earthquake science, and in part by the implementation of new research in the delivery of earthquake information
Authors
David J. Wald
Timing of occurrence of large submarine landslides on the Atlantic Ocean margin Timing of occurrence of large submarine landslides on the Atlantic Ocean margin
Submarine landslides are distributed unevenly both in space and time. Spatially, they occur most commonly in fjords, active river deltas, submarine canyon-fan systems, the open continental slope and on the flanks of oceanic volcanic islands. Temporally, they are influenced by the size, location, and sedimentology of migrating depocenters, changes in seafloor pressures and temperatures...
Authors
H.J. Lee
Landslide movement in southwest Colorado triggered by atmospheric tides Landslide movement in southwest Colorado triggered by atmospheric tides
Landslides are among the most hazardous of geological processes, causing thousands of casualties and damage on the order of billions of dollars annually. The movement of most landslides occurs along a discrete shear surface, and is triggered by a reduction in the frictional strength of the surface. Infiltration of water into the landslide from rainfall and snowmelt and ground motion from
Authors
W.H. Schulz, J. W. Kean, G. Wang
Basal-topographic control of stationary ponds on a continuously moving landslide Basal-topographic control of stationary ponds on a continuously moving landslide
The Slumgullion landslide in the San Juan Mountains of southwestern Colorado has been moving for at least the last few hundred years and has multiple ponds on its surface. We have studied eight ponds during 30 trips to the landslide between July 1998 and July 2007. During each trip, we have made observations on the variability in pond locations and water levels, taken ground-based...
Authors
J. A. Coe, J.P. McKenna, J. W. Godt, R.L. Baum
Submarine landslide as the source for the October 11, 1918 Mona Passage tsunami: Observations and modeling Submarine landslide as the source for the October 11, 1918 Mona Passage tsunami: Observations and modeling
The October 11, 1918 ML 7.5 earthquake in the Mona Passage between Hispaniola and Puerto Rico generated a local tsunami that claimed approximately 100 lives along the western coast of Puerto Rico. The area affected by this tsunami is now significantly more populated. Newly acquired high-resolution bathymetry and seismic reflection lines in the Mona Passage show a fresh submarine...
Authors
A.M. López-Venegas, Uri S. ten Brink, Eric L. Geist