Publications
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Continents as lithological icebergs: The importance of buoyant lithospheric roots Continents as lithological icebergs: The importance of buoyant lithospheric roots
An understanding of the formation of new continental crust provides an important guide to locating the oldest terrestrial rocks and minerals. We evaluated the crustal thicknesses of the thinnest stable continental crust and of an unsubductable oceanic plateau and used the resulting data to estimate the amount of mantle melting which produces permanent continental crust. The lithospheric...
Authors
D.H. Abbott, R. Drury, Walter D. Mooney
Predicting landslide vegetation in patches on landscape gradients in Puerto Rico Predicting landslide vegetation in patches on landscape gradients in Puerto Rico
We explored the predictive value of common landscape characteristics for landslide vegetative stages in the Luquillo Experimental Forest of Puerto Rico using four different analyses. Maximum likelihood logistic regression showed that aspect, age, and substrate type could be used to predict vegetative structural stage. In addition it showed that the structural complexity of the vegetation...
Authors
R.W. Myster, J.R. Thomlinson, M. C. Larsen
Evidence from flank ridges for long-term diminishing movements of the Slumgullion landslide, Hinsdale County, Colorado Evidence from flank ridges for long-term diminishing movements of the Slumgullion landslide, Hinsdale County, Colorado
No abstract available.
Authors
Mario Parise, Andrea Moscariello, Robert W. Fleming
El Nino and the National Landslide Hazard Outlook for 1997-1998 El Nino and the National Landslide Hazard Outlook for 1997-1998
No abstract available.
Authors
Jonathan W. Godt, Lynn M. Highland, William Z. Savage
Benefits of volcano monitoring far outweigh costs - the case of Mount Pinatubo Benefits of volcano monitoring far outweigh costs - the case of Mount Pinatubo
The climactic June 1991 eruption of Mount Pinatubo, Philippines, was the largest volcanic eruption in this century to affect a heavily populated area. Because it was forecast by scientists from the Philippine Institute of Volcanology and Seismology and the U.S. Geological Survey, civil and military leaders were able to order massive evacuations and take measures to protect property...
Authors
Chris G. Newhall, James W. Hendley, Peter H. Stauffer
Executive summary of vision and options for the future of the US National Strong-Motion Program Executive summary of vision and options for the future of the US National Strong-Motion Program
These reports are presented in response to a charge of the Earthquake Hazards Reduction Program (EHRP) Program Council of the U.S. Geological Survey to 'define the future of the USGS National Strong-Motion Program (NSMP)' (Appendix A). The council requested that a 'Vision Paper' and an 'Options Document' be prepared. Each of these reports is a separate document. The 'Executive Summary'...
Authors
Introduction to special section: The Trans-Alaska Crustal Transect (TACT) across Arctic Alaska Introduction to special section: The Trans-Alaska Crustal Transect (TACT) across Arctic Alaska
This special section of the Journal of Geophysical Research addresses the composition and structural evolution of the lithosphere in northern Alaska. Investigations reported in this section were mainly undertaken as part of the Trans‐Alaska Crustal Transect (TACT), an integrated geological and geophysical transect of the entire Alaskan lithosphere along a north‐south corridor undertaken...
Authors
George Plafker, Walter D. Mooney
The 1995 revision of the joint US/UK geomagnetic field models. II: Main field The 1995 revision of the joint US/UK geomagnetic field models. II: Main field
This paper presents the 1995 main-field revision of the World Magnetic Model (WMM-95). It is based on Project MAGNET high-level (??? 15,000 ft.) vector aeromagnetic survey data collected between 1988 and 1994 and on scalar total intensity data collected by the Polar Orbiting Geomagnetic Survey (POGS) satellite during the period 1991 through 1993. The spherical harmonic model produced...
Authors
J.M. Quinn, R.J. Coleman, S. Macmillan, D.R. Barraclough
Ophiolitic basement to the Great Valley forearc basin, California, from seismic and gravity data: Implications for crustal growth at the North American continental margin Ophiolitic basement to the Great Valley forearc basin, California, from seismic and gravity data: Implications for crustal growth at the North American continental margin
The nature of the Great Valley basement, whether oceanic or continental, has long been a source of controversy. A velocity model (derived from a 200-km-long east-west reflection-refraction profile collected south of the Mendocino triple junction, northern California, in 1993), further constrained by density and magnetic models, reveals an ophiolite underlying the Great Valley (Great...
Authors
N. J. Godfrey, B. C. Beaudoin, S.L. Klemperer, A. Levander, J. Luetgert, A. Meltzer, Walter D. Mooney, A. Trehu
Debris-flow mobilization from landslides Debris-flow mobilization from landslides
Field observations, laboratory experiments, and theoretical analyses indicate that landslides mobilize to form debris flows by three processes: (a) widespread Coulomb failure within a sloping soil, rock, or sediment mass, (b) partial or complete liquefaction of the mass by high pore-fluid pressures, and (c) conversion of landslide translational energy to internal vibrational energy (i.e...
Authors
Richard M. Iverson, Mark E. Reid, Richard G. Lahusen
Preliminary maps showing rainfall thresholds for debris-flow activity, San Francisco Bay region, California Preliminary maps showing rainfall thresholds for debris-flow activity, San Francisco Bay region, California
No abstract available.
Authors
Raymond C. Wilson, Angela S. Jayko
Landslides triggered by the April 1997, tropical storms in Pohnpei, Federated States of Micronesia Landslides triggered by the April 1997, tropical storms in Pohnpei, Federated States of Micronesia
No abstract available.
Authors
E. L. Harp, W. Z. Savage