Publications
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Regional landslide-hazard assessment for Seattle, Washington, USA Regional landslide-hazard assessment for Seattle, Washington, USA
Landslides are a widespread, frequent, and costly hazard in Seattle and the Puget Sound area of Washington State, USA. Shallow earth slides triggered by heavy rainfall are the most common type of landslide in the area; many transform into debris flows and cause significant property damage or disrupt transportation. Large rotational and translational slides, though less common, also cause...
Authors
R.L. Baum, J. Coe, J. W. Godt, E. Harp, M.E. Reid, W. Savage, W.H. Schulz, D.L. Brien, A.F. Chleborad, J.P. McKenna, J. Michael
Locations and descriptions of gravity, box, and push cores collected in San Francisco Bay between January and February, 1990 and 1991 Locations and descriptions of gravity, box, and push cores collected in San Francisco Bay between January and February, 1990 and 1991
A project to study San Francisco Bay sediments collected over 300 sediment gravity cores; six push cores, and three box cores in San Francisco Bay during the years 1990-91. The purpose of the sampling effort is to establish a database on the Holocene sediment history of the bay. The samples described and mapped are the first effort to catalog and present the data collected. Thus far the...
Authors
Roberto Anima, H. Clifton, Carol Reiss, Florence Wong
libvaxdata: VAX data format conversion routines libvaxdata: VAX data format conversion routines
libvaxdata provides a collection of routines for converting numeric data-integer and floating-point-to and from the formats used on a Digital Equipment Corporation1 (DEC) VAX 32-bit minicomputer (Brunner, 1991). Since the VAX numeric data formats are inherited from those used on a DEC PDP-11 16-bit minicomputer, these routines can be used to convert PDP-11 data as well. VAX numeric data...
Authors
Lawrence Baker
Reply to "Comment on 'How can seismic hazard in the New Madrid seismic zone be similar to that in California?' by Arthur Frankel" Reply to "Comment on 'How can seismic hazard in the New Madrid seismic zone be similar to that in California?' by Arthur Frankel"
No abstract available.
Authors
Arthur Frankel
An integrated view of the chemistry and mineralogy of martian soils An integrated view of the chemistry and mineralogy of martian soils
The mineralogical and elemental compositions of the martian soil are indicators of chemical and physical weathering processes. Using data from the Mars Exploration Rovers, we show that bright dust deposits on opposite sides of the planet are part of a global unit and not dominated by the composition of local rocks. Dark soil deposits at both sites have similar basaltic mineralogies, and...
Authors
A. Yen, Ralf Gellert, C. Schroder, R.V. Morris, J.F. Bell, A.T. Knudson, B.C. Clark, D. Ming, J.A. Crisp, R. E. Arvidson, D. Blaney, J. Bruckner, P. Christensen, D.J. DesMarais, P.A. De Souza, T.E. Economou, A. Ghosh, B.C. Hahn, Kenneth Herkenhoff, L.A. Haskin, J.A. Hurowitz, B.L. Joliff, J. Johnson, G. Klingelhofer, M.B. Madsen, S. McLennan, H.Y. McSween, L. Richter, R. Rieder, D. Rodionov, Laurence Soderblom, S. Squyres, N.J. Tosca, A. Wang, M. Wyatt, J. Zipfel
The carbon dioxide cycle The carbon dioxide cycle
The seasonal CO2 cycle on Mars refers to the exchange of carbon dioxide between dry ice in the seasonal polar caps and gaseous carbon dioxide in the atmosphere. This review focuses on breakthroughs in understanding the process involving seasonal carbon dioxide phase changes that have occurred as a result of observations by Mars Global Surveyor.
Authors
Philip James, Gary Hansen, Timothy Titus
Ongoing hydrothermal heat loss from the 1912 ash-flow sheet, Valley of Ten Thousand Smokes, Alaska Ongoing hydrothermal heat loss from the 1912 ash-flow sheet, Valley of Ten Thousand Smokes, Alaska
The June 1912 eruption of Novarupta filled nearby glacial valleys on the Alaska Peninsula with ash-flow tuff (ignimbrite), and post-eruption observations of thousands of steaming fumaroles led to the name ‘Valley of Ten Thousand Smokes’ (VTTS). By the late 1980s most fumarolic activity had ceased, but the discovery of thermal springs in mid-valley in 1987 suggested continued cooling of...
Authors
N. Hogeweg, T. Keith, E.M. Colvard, S. Ingebritsen
An updated global earthquake catalogue for stable continental regions: Reassessing the correlation with ancient rifts An updated global earthquake catalogue for stable continental regions: Reassessing the correlation with ancient rifts
We present an updated global earthquake catalogue for stable continental regions (SCRs; i.e. intraplate earthquakes) that is available on the Internet. Our database contains information on location, magnitude, seismic moment and focal mechanisms for over 1300 M (moment magnitude) ≥ 4.5 historic and instrumentally recorded crustal events. Using this updated earthquake database in...
Authors
S.M. Schulte, Walter Mooney
Remotely triggered earthquakes following moderate mainshocks (or, why California is not falling into the ocean) Remotely triggered earthquakes following moderate mainshocks (or, why California is not falling into the ocean)
On several occasions in recent memory California has experienced apparent clusters of earthquake activity that are too far apart to be considered related according to a classic taxonomy that includes foreshocks, mainshocks, and aftershocks. During a week-long period in July 1986, California experienced the M 6.0 North Palm Springs earthquake, the M 5.5 Oceanside earthquake, and a swarm...
Authors
Susan Hough
Preliminary report on the 28 September 2004, M 6.0 Parkfield, California earthquake Preliminary report on the 28 September 2004, M 6.0 Parkfield, California earthquake
The Mw 6.0 Parkfield earthquake struck central California at 17:15:14 UTC on 28 September 2004. The epicenter was located 11 km southeast of the rural town of Parkfield, adjacent to Gold Hill and on the San Andreas Fault (Figure 1). The California Integrated Seismic Network (CISN) reported that the hypocenter was located at 35.819°N, 120.364°W at a depth of 8.8 km. From the distribution...
Authors
John Langbein, Roger Borcherdt, Douglas Dreger, J. Fletcher, Jeanne Hardebeck, Margaret Hellweg, C. Ji, Malcolm Johnston, Jessica Murray, Robert Nadeau, Michael Rymer, Jerome Treiman
Aeolian processes at the Mars Exploration Rover Meridiani Planum landing site Aeolian processes at the Mars Exploration Rover Meridiani Planum landing site
The martian surface is a natural laboratory for testing our understanding of the physics of aeolian (wind-related) processes in an environment different from that of Earth. Martian surface markings and atmospheric opacity are time-variable, indicating that fine particles at the surface are mobilized regularly by wind. Regolith (unconsolidated surface material) at the Mars Exploration...
Authors
R. Sullivan, D. Banfield, J.F. Bell, W. Calvin, D. Fike, M. Golombek, R. Greeley, J. Grotzinger, Kenneth Herkenhoff, D. Jerolmack, M. Malin, D. Ming, Laurence Soderblom, S. Squyres, S. Thompson, W.A. Watters, C.M. Weitz, A. Yen
The May 2003 eruption of Anatahan volcano, Mariana Islands: Geochemical evolution of a silicic island-arc volcano The May 2003 eruption of Anatahan volcano, Mariana Islands: Geochemical evolution of a silicic island-arc volcano
The first historical eruption of Anatahan volcano began on May 10, 2003. Samples of tephra from early in the eruption were analyzed for major and trace elements, and Sr, Nd, Pb, Hf, and O isotopic compositions. The compositions of these tephras are compared with those of prehistoric samples of basalt and andesite, also newly reported here. The May 2003 eruptives are medium-K andesites...
Authors
J.A. Wade, T. Plank, R. Stern, D.L. Tollstrup, J.B. Gill, J. O’Leary, J.M. Eiler, R. Moore, J.D. Woodhead, F. Trusdell, T.P. Fischer, David Hilton