Publications
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Debris-flow hazards caused by hydrologic events at Mount Rainier, Washington
At 4393 m, ice-clad Mount Rainier has great potential for debris flows owing to its precipitous slopes and incised steep valleys, the large volume of water stored in its glaciers, and a mantle of loose debris on its slopes. In the past 10,000 years, more than sixty Holocene lahars have occurred at Mount Rainier (Scott et al., 1985), and, in addition more than thirty debris flows not related to vol
Authors
James W. Vallance, Michelle L. Cunico, Steve P. Schilling
Preliminary evaluation of a precipitation threshold for anticipating the occurrence of landslides in the Seattle, Washington, area
No abstract available.
Authors
Alan F. Chleborad
Earthquake recordings from the 2002 Seattle Seismic Hazard Investigation of Puget Sound (SHIPS), Washington state
This report describes seismic data obtained during the fourth Seismic Hazard Investigation of Puget Sound (SHIPS) experiment, termed Seattle SHIPS . The experiment was designed to study the influence of the Seattle sedimentary basin on ground shaking during earthquakes. To accomplish this, we deployed seismometers over the basin to record local earthquakes, quarry blasts, and teleseisms during the
Authors
Thomas L. Pratt, Karen L. Meagher, Thomas M. Brocher, Thomas Yelin, Robert Norris, Lynn Hultgrien, Elizabeth Barnett, Craig S. Weaver
Emergency Assessment of Debris-Flow Hazards from Basins Burned by the Piru, Simi, and Verdale Fires of 2003, Southern California
These maps present preliminary assessments of the probability of debris-flow activity and estimates of peak discharges that can potentially be generated by debris-flows issuing from basins burned by the Piru, Simi and Verdale Fires of October 2003 in southern California in response to the 25-year, 10-year, and 2-year 1-hour rain storms. The probability maps are based on the application of a logist
Authors
Susan H. Cannon, Joseph E. Gartner, Michael G. Rupert, John A. Michael
Preliminary geologic map of Great Sitkin Volcano, Alaska
No abstract available.
Authors
Christopher F. Waythomas, Thomas P. Miller, Christopher Nye
Preliminary volcano-hazard assessment for Great Sitkin Volcano, Alaska
Great Sitkin Volcano is a composite andesitic stratovolcano on Great Sitkin Island (51°05’ N latitude, 176°25’ W longitude), a small (14 x 16 km), circular volcanic island in the western Aleutian Islands of Alaska. Great Sitkin Island is located about 35 kilometers northeast of the community of Adak on Adak Island and 130 kilometers west of the community of Atka on Atka Island. Great Sitkin Volcan
Authors
Christopher F. Waythomas, Thomas P. Miller, Christopher J. Nye
Preliminary geologic map of Kanaga Volcano, Alaska
Kanaga Volcano is a 1,300 m (4,287-foot) high, historically active cone-shaped stratovolcano located on the north end of Kanaga Island in the Andreanof Islands Group of the Aleutian Islands. The volcano is undissected, symmetrical in profile, and is characterized by blocky andesitic lava flows, with well-developed levees and steep flow fronts, that emanate radially from, or near, the 200-m-wide su
Authors
T. P. Miller, C. F. Waythomas, C.J. Nye
Emergency Assessment of Debris-Flow Hazards from Basins Burned by the Grand Prix and Old Fires of 2003, Southern California
These maps present preliminary assessments of the probability of debris-flow activity and estimates of peak discharges that can potentially be generated by debris flows issuing from basins burned by the Old and Grand Prix Fires of October 2003 in southern California in response to the 25-year, 10-year, and 2-year recurrence, 1-hour duration rain storms. The probability maps are based on the applic
Authors
Susan H. Cannon, Joseph E. Gartner, Michael G. Rupert, John A. Michael, Dean Djokic, Sreeresh Sreedhar
Potential role of gas hydrate decomposition in generating submarine slope failures
Gas hydrate decomposition is hypothesized to be a factor in generating weakness in continental margin sediments that may help explain some of the observed patterns of continental margin sediment instability. The processes associated with formation and decomposition of gas hydrate can cause the strengthening of sediments in which gas hydrate grow and the weakening of sediments in which gas hydrate
Authors
Charles K. Pauli, William III Ussler, William P. Dillon
Responses of infaunal populations to benthoscape structure and the potential importance of transition zones
Relationships between population abundance and seafloor landscape, or benthoscape, structure were examined for 16 infaunal taxa in eastern Long Island Sound. Based on analyses of a side-scan sonar mosaic, the 19.4-km2 study area was comprised of six distinct large-scale (> km2) benthoscape elements, with varying levels of mesoscale (km2-m2) and small-scale (< m2) physical and biological habitat he
Authors
R.N. Zajac, R. S. Lewis, L.J. Poppe, D. C. Twichell, J. Vozarik, M. L. DiGiacomo-Cohen
The crustal structure from the Altai Mountains to the Altyn Tagh fault, northwest China
[1] We present a new crustal section across northwest China based on a seismic refraction profile and geologic mapping. The 1100‐km‐long section crosses the southern margin of the Chinese Altai Mountains, Junggar Accretional Belt and eastern Junggar basin, easternmost Tianshan Mountains, and easternmost Tarim basin. The crustal velocity structure and Poisson's ratio (σ), which provide a constraint
Authors
Y. Wang, Walter D. Mooney, X. Yuan, R. G. Coleman
Density of the continental roots: Compositional and thermal contributions
The origin and evolution of cratonic roots has been debated for many years. Precambrian cratons are underlain by cold lithospheric roots that are chemically depleted. Thermal and petrologic data indicate that Archean roots are colder and more chemically depleted than Proterozoic roots. This observation has led to the hypothesis that the degree of depletion in a lithospheric root depends mostly on
Authors
M.K. Kaban, P. Schwintzer, I.M. Artemieva, Walter D. Mooney