Publications
Filter Total Items: 2186
Superposed epoch analysis and storm statistics from 25 years of the global geomagnetic disturbance index, USGS-Dst
Statistics on geomagnetic storms with minima below -50 nanoTesla are compiled using a 25-year span of the 1-minute resolution disturbance index, U.S. Geological Survey Dst. A sudden commencement, main phase minimum, and time between the two has a magnitude of 35 nanoTesla, -100 nanoTesla, and 12 hours, respectively, at the 50th percentile level. The cumulative distribution functions for each of th
Authors
J.L. Gannon
Seismic hazard of American Samoa and neighboring South Pacific Islands--methods, data, parameters, and results
American Samoa and the neighboring islands of the South Pacific lie near active tectonic-plate boundaries that host many large earthquakes which can result in strong earthquake shaking and tsunamis. To mitigate earthquake risks from future ground shaking, the Federal Emergency Management Agency requested that the U.S. Geological Survey prepare seismic hazard maps that can be applied in building-de
Authors
Mark D. Petersen, Stephen C. Harmsen, Kenneth S. Rukstales, Charles S. Mueller, Daniel E. McNamara, Nicolas Luco, Melanie Walling
Deterministic estimation of hydrological thresholds for shallow landslide initiation and slope stability models: case study from the Somma-Vesuvius area of southern Italy
Rainfall-induced debris flows involving ash-fall pyroclastic deposits that cover steep mountain slopes surrounding the Somma-Vesuvius volcano are natural events and a source of risk for urban settlements located at footslopes in the area. This paper describes experimental methods and modelling results of shallow landslides that occurred on 5–6 May 1998 in selected areas of the Sarno Mountain Range
Authors
Rex L. Baum, Jonathan W. Godt, P. De Vita, E. Napolitano
Kinematics of the Slumgullion landslide revealed by ground-based InSAR surveys
No abstract available.
Authors
W.H. Schulz, J. A. Coe, B.L. Shurtleff, J. Panosky, P. Farina, P.P. Ricci, G. Barsacchi
Assessment of shallow landslide potential using 1-D and 3-D slope stability analysis
No abstract available.
Authors
Rex L. Baum, Jonathan W. Godt, Jeffrey A. Coe, Mark E. Reid
Prototype landslide hazard map of the conterminous United States
No abstract available.
Authors
J. W. Godt, J. A. Coe, R.L. Baum, L.M. Highland, J.R. Keaton, R.J. Roth
Review of approaches for assessing the impact of climate change on landslide hazards
No abstract available.
Authors
Jeffrey A. Coe, J. W. Godt
Effects of soil-engineering properties on the failure mode of shallow landslides
Some landslides mobilize into flows, while others slide and deposit material immediately down slope. An index based on initial dry density and fine-grained content of soil predicted failure mode of 96 landslide initiation sites in Oregon and Colorado with 79% accuracy. These material properties can be used to identify potential sources for debris flows and for slides. Field data suggest that loose
Authors
Jonathan Peter McKenna, Paul Michael Santi, Xavier Amblard, Jacquelyn Negri
Sediment entrainment by debris flows: In situ measurements from the headwaters of a steep catchment
Debris flows can dramatically increase their volume, and hence their destructive potential, by entraining sediment. Yet quantitative constraints on rates and mechanics of sediment entrainment by debris flows are limited. Using an in situ sensor network in the headwaters of a natural catchment we measured flow and bed properties during six erosive debris-flow events. Despite similar flow properties
Authors
S.W. McCoy, Jason W. Kean, Jeffrey A. Coe, G.E. Tucker, Dennis M. Staley, T.A. Wasklewicz
Publication: Evansville hazard maps
The Evansville (Indiana) Area Earthquake Hazards Mapping Project was completed in February 2012. It was a collaborative effort among the U.S. Geological Survey and regional partners Purdue University; the Center for Earthquake Research and Information at the University of Memphis; the state geologic surveys of Kentucky, Illinois, and Indiana; the Southwest Indiana Disaster Resistant Community Corp
Authors
Refinements to the method of epicentral location based on surface waves from ambient seismic noise: introducing Love waves
The purpose of this study is to develop and test a modification to a previous method of regional seismic event location based on Empirical Green’s Functions (EGFs) produced from ambient seismic noise. Elastic EGFs between pairs of seismic stations are determined by cross-correlating long ambient noise time-series recorded at the two stations. The EGFs principally contain Rayleigh- and Love-wave ene
Authors
Anatoli L. Levshin, Mikhail P. Barmin, Morgan P. Moschetti, Carlos Mendoza, Michael H. Ritzwoller
Objective definition of rainfall intensity-duration thresholds for the initiation of post-fire debris flows in southern California
Rainfall intensity–duration (ID) thresholds are commonly used to predict the temporal occurrence of debris flows and shallow landslides. Typically, thresholds are subjectively defined as the upper limit of peak rainstorm intensities that do not produce debris flows and landslides, or as the lower limit of peak rainstorm intensities that initiate debris flows and landslides. In addition, peak rains
Authors
Dennis Staley, Jason W. Kean, Susan H. Cannon, Kevin M. Schmidt, Jayme L. Laber