Publications
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Earthquakes in Arkansas and vicinity 1699-2010
This map summarizes approximately 300 years of earthquake activity in Arkansas. It is one in a series of similar State earthquake history maps. Work on the Arkansas map was done in collaboration with the Arkansas Geological Survey. The earthquake data plotted on the map are from several sources: the Arkansas Geological Survey, the Center for Earthquake Research and Information, the National Center
Authors
Richard L. Dart, Scott M. Ausbrooks
Spatially explicit shallow landslide susceptibility mapping over large areas
Recent advances in downscaling climate model precipitation predictions now yield spatially explicit patterns of rainfall that could be used to estimate shallow landslide susceptibility over large areas. In California, the United States Geological Survey is exploring community emergency response to the possible effects of a very large simulated storm event and to do so it has generated downscaled p
Authors
Dino Bellugi, William E. Dietrich, Jonathan D. Stock, Jim McKean, Brian Kazian, Paul Hargrove
By
Energy and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Groundwater and Streamflow Information Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
A two-phase debris-flow model that includes coupled evolution of volume fractions, granular dilatancy, and pore-fluid pressure
Pore-fluid pressure plays a crucial role in debris flows because it counteracts normal stresses at grain contacts and thereby reduces intergranular friction. Pore-pressure feedback accompanying debris deformation is particularly important during the onset of debrisflow motion, when it can dramatically influence the balance of forces governing downslope acceleration. We consider further effects of
Authors
David L. George, Richard M. Iverson
Three‐dimensional model for the crust and upper mantle in the Barents Sea region
The Barents Sea and its surroundings is an epicontinental region which previously has been difficult to access, partly because of its remote Arctic location (Figure 1) and partly because the region has been politically sensitive. Now, however, this region, and in particular its western parts, has been very well surveyed with a variety of geophysical studies, motivated in part by exploration for hy
Authors
H. Bangum, O. Ritzmann, N. Maercklin, J.I. Faleide, Walter D. Mooney, Shane T. Detweiler
Small explosion from new vent at Kilauea’s summit
At 0258 Hawaii‐Aleutian Standard Time (HST) on 19 March 2008, a small explosion scattered altered and fresh lithic debris across a 40‐hectare area at the summit of Kilauea volcano. This explosion, the first recorded there since 1924, issued from a vent about 35 meters wide along the east wall of Halema'uma'u Crater. Ballistic fragments—the largest measuring nearly 1 meter across—were propelled upw
Authors
David C. Wilson, Tamar Elias, T. Orr, Matthew R. Patrick, Jeff Sutton, Don Swanson
Mars atmospheric surface interactions and the CO2 cycle
Mars' northern and southern seasonal polar caps are formed during their respective autumn and winter seasons both by condensation of atmospheric carbon dioxide (CO2) directly onto the surface, and through atmospheric precipitation in the form of CO2 snow. During the polar spring and summer, the seasonal ice sublimes, returning CO2 to the atmosphere.Roughly 25% of the atmosphere, which is 95% CO2 b
Authors
Timothy N. Titus, Anthony Colaprete
Coseismic slip distribution of the February 27, 2010 Mw 8.9 Maule, Chile earthquake
[1] Static offsets produced by the February 27, 2010 Mw = 8.8 Maule, Chile earthquake as measured by GPS and InSAR constrain coseismic slip along a section of the Andean megathrust of dimensions 650 km (in length) × 180 km (in width). GPS data have been collected from both campaign and continuous sites sampling both the near-field and far field. ALOS/PALSAR data from several ascending and descendi
Authors
Fred F. Pollitz, Ben Brooks, Xiaopeng Tong, Michael G. Bevis, James H. Foster, Roland Burgmann
Required number of records for ASCE/SEI 7 ground-motion scaling procedure
The procedures and criteria in 2006 IBC (International Council of Building Officials, 2006) and 2007 CBC (International Council of Building Officials, 2007) for the selection and scaling ground-motions for use in nonlinear response history analysis (RHA) of structures are based on ASCE/SEI 7 provisions (ASCE, 2005, 2010). According to ASCE/SEI 7, earthquake records should be selected from events o
Authors
Juan C. Reyes, Erol Kalkan
Estimation of bed-material transport in the lower Chetco River, Oregon, water years 2009-2010
This assessment of bed-material transport uses methods developed in a previous study (Wallick and others, 2010) to estimate bed-material flux at the USGS Chetco River streamflow gaging station located at flood-plain kilometer 15 (14400000). On the basis of regressions between daily mean flow and transport capacity, daily bed-material flux was calculated for the period October 1, 2008 to March 30,
Authors
J. Rose Wallick, Jim E. O'Connor
Rapid estimation of the economic consequences of global earthquakes
The U.S. Geological Survey's (USGS) Prompt Assessment of Global Earthquakes for Response (PAGER) system, operational since mid 2007, rapidly estimates the most affected locations and the population exposure at different levels of shaking intensities. The PAGER system has significantly improved the way aid agencies determine the scale of response needed in the aftermath of an earthquake. For exampl
Authors
Kishor Jaiswal, David J. Wald
Gas and isotope chemistry of thermal features in Yellowstone National Park, Wyoming
This report presents 130 gas analyses and 31 related water analyses on samples collected from thermal features at Yellowstone between 2003 and 2009. An overview of previous studies of gas emissions at Yellowstone is also given. The analytical results from the present study include bulk chemistry of gases and waters and isotope values for water and steam (delta18O, dealtaD), carbon dioxide (delta13
Authors
D. Bergfeld, Jacob B. Lowenstern, Andrew G. Hunt, W.C. Pat Shanks, William Evans