Publications
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Database for the Geologic Map of Newberry Volcano, Deschutes, Klamath, and Lake Counties, Oregon
Newberry Volcano, one of the largest Quaternary volcanoes in the conterminous United States, is a broad shield-shaped volcano measuring 60 km north-south by 30 km east-west with a maximum elevation of more than 2 km. Newberry Volcano is the product of deposits from thousands of eruptions, including at least 25 in the past approximately 12,000 years (Holocene Epoch). Newberry Volcano has erupted as
Authors
Joseph A. Bard, David W. Ramsey, Norman S. MacLeod, David R. Sherrod, Lawrence A. Chitwood, Robert A. Jensen
Insignificant solar-terrestrial triggering of earthquakes
We examine the claim that solar-terrestrial interaction, as measured by sunspots, solar wind velocity, and geomagnetic activity, might play a role in triggering earthquakes. We count the number of earthquakes having magnitudes that exceed chosen thresholds in calendar years, months, and days, and we order these counts by the corresponding rank of annual, monthly, and daily averages of the solar-te
Authors
Jeffrey J. Love, Jeremy N. Thomas
Improving predictive power of physically based rainfall-induced shallow landslide models: a probablistic approach
Distributed models to forecast the spatial and temporal occurrence of rainfall-induced shallow landslides are deterministic. These models extend spatially the static stability models adopted in geotechnical engineering and adopt an infinite-slope geometry to balance the resisting and the driving forces acting on the sliding mass. An infiltration model is used to determine how rainfall changes pore
Authors
S. Raia, M. Alvioli, M. Rossi, R.L. Baum, J. W. Godt, F. Guzzetti
Field survey and damage assessment of the Mineral, Virginia, earthquake of August 23, 2011
The town of Mineral, Virginia (Va.), underwent an M=5.8 earthquake on August 23, 2011. A U.S. Geological Survey team was sent to visually inspect and document the damage in the cities of Richmond, Charlottesville, Louisa, and Mineral, Va. Our inspection concluded that the Modified Mercalli Intensity rating of moderate (V) to very strong (VII) is consistent with the expected and observed damage at
Authors
Helen R. Thomas, Katharine Turkle
UNLV’s environmentally friendly Science and Engineering Building is monitored for earthquake shaking
The University of Nevada Las Vegas’ (UNLV) Science and Engineering Building is at the cutting edge of environmentally friendly design. As the result of a recent effort by the U.S. Geological Survey’s National Strong Motion Project in cooperation with UNLV, the building is now also in the forefront of buildings installed with structural monitoring systems to measure response during earthquakes. Thi
Authors
Erol Kalkan, Woody Savage, Shahneam Reza, Eric Knight, Ying Tian
Heterogeneous rupture in the great Cascadia earthquake of 1700 inferred from coastal subsidence estimates
Past earthquake rupture models used to explain paleoseismic estimates of coastal subsidence during the great A.D. 1700 Cascadia earthquake have assumed a uniform slip distribution along the megathrust. Here we infer heterogeneous slip for the Cascadia margin in A.D. 1700 that is analogous to slip distributions during instrumentally recorded great subduction earthquakes worldwide. The assumption of
Authors
Pei-Ling Wang, Simon E. Engelhart, Kelin Wang, Andrea D. Hawkes, Benjamin P. Horton, Alan R. Nelson, Robert C. Witter
Volcano–ice interactions precursory to the 2009 eruption of Redoubt Volcano, Alaska
In late summer of 2008, after nearly 20 years of quiescence, Redoubt Volcano began to show signs of abnormal heat flow in its summit crater. In the months that followed, the excess heat triggered melting and ablation of Redoubt's glaciers, beginning at the summit and propagating to lower elevations as the unrest accelerated. A variety of morphological changes were observed, including the creation
Authors
Heather A. Bleick, Michelle L. Coombs, Peter F. Cervelli, Katharine F. Bull, Rick Wessels
High-resolution satellite and airborne thermal infrared imaging of precursory unrest and 2009 eruption of Redoubt Volcano, Alaska
A combination of satellite and airborne high-resolution visible and thermal infrared (TIR) image data detected and measured changes at Redoubt Volcano during the 2008–2009 unrest and eruption. The TIR sensors detected persistent elevated temperatures at summit ice-melt holes as seismicity and gas emissions increased in late 2008 to March 2009. A phreatic explosion on 15 March was followed by more
Authors
Rick L. Wessels, R. Greg Vaughan, Matthew R. Patrick, Michelle L. Coombs
Ground motions recorded in Rome during the April 2009 L’Aquila seismic sequence: site response and comparison with ground‐motion predictions based on a global dataset
The mainshock and moderate‐magnitude aftershocks of the 6 April 2009 M 6.3 L’Aquila seismic sequence, about 90 km northeast of Rome, provided the first earthquake ground‐motion recordings in the urban area of Rome. Before those recordings were obtained, the assessments of the seismic hazard in Rome were based on intensity observations and theoretical considerations. The L’Aquila recordings offer a
Authors
Arrigo Caserta, David Boore, Antonio Rovelli, Aladino Govoni, Fabrizio Marra, Gieseppe Della Monica, Enzo Boschi
Geospace environment modeling 2008--2009 challenge: Dst index
This paper reports the metrics-based results of the Dst index part of the 2008–2009 GEM Metrics Challenge. The 2008–2009 GEM Metrics Challenge asked modelers to submit results for four geomagnetic storm events and five different types of observations that can be modeled by statistical, climatological or physics-based models of the magnetosphere-ionosphere system. We present the results of 30 model
Authors
L. Rastätter, M.M. Kuznetsova, A. Glocer, D. Welling, X. Meng, J. Raeder, M. Wittberger, V.K. Jordanova, Y. Yu, S. Zaharia, R.S. Weigel, S. Sazykin, R. Boynton, H. Wei, V. Eccles, W. Horton, M.L. Mays, J. Gannon
Postwildfire debris-flow hazard assessment of the area burned by the 2012 Little Bear Fire, south-central New Mexico
A preliminary hazard assessment was developed of the debris-flow potential from 56 drainage basins burned by the Little Bear Fire in south-central New Mexico in June 2012. The Little Bear Fire burned approximately 179 square kilometers (km2) (44,330 acres), including about 143 km2 (35,300 acres) of National Forest System lands of the Lincoln National Forest. Within the Lincoln National Forest, abo
Authors
Anne C. Tillery, Anne Marie Matherne
High-resolution seismic-reflection and marine-magnetic data from offshore central California--San Gregorio to Point Sur
The U.S. Geological Survey collected high-resolution seismic-reflection data on four surveys (S-N1-09-MB, S-15-10-NC, S-06-11-MB, and S-04-12-MB) and marine-magnetic data on one survey (S-06-11-MB) between 2009 and 2012, offshore of central California between San Gregorio and Point Sur. This work was supported in part by the California Seafloor Mapping Program.
The survey areas span about 120 km
Authors
Ray W. Sliter, Samuel Y. Johnson, Janet T. Watt, Daniel S. Scheirer, Parker Allwardt, Peter J. Triezenberg