Publications
Filter Total Items: 2537
Laboratory observations of fault strength in response to changes in normal stress
Changes in fault normal stress can either inhibit or promote rupture propagation, depending on the fault geometry and on how fault shear strength varies in response to the normal stress change. A better understanding of this dependence will lead to improved earthquake simulation techniques, and ultimately, improved earthquake hazard mitigation efforts. We present the results of new laboratory expe
Authors
Brian D. Kilgore, Julian Lozos, Nicholas M. Beeler, David Oglesby
Should ground-motion records be rotated to fault-normal/parallel or maximum direction for response history analysis of buildings?
In the United States, regulatory seismic codes (for example, California Building Code) require at least two sets of horizontal ground-motion components for three-dimensional (3D) response history analysis (RHA) of building structures. For sites within 5 kilometers (3.1 miles) of an active fault, these records should be rotated to fault-normal and fault-parallel (FN/FP) directions, and two RHAs sho
Authors
Juan C. Reyes, Erol Kalkan
Advanced earthquake monitoring system for U.S. Department of Veterans Affairs medical buildings--instrumentation
In collaboration with the U.S. Department of Veterans Affairs (VA), the National Strong Motion Project (NSMP; http://nsmp.wr.usgs.gov/) of the U.S. Geological Survey has been installing sophisticated seismic systems that will monitor the structural integrity of 28 VA hospital buildings located in seismically active regions of the conterminous United States, Alaska, and Puerto Rico during earthquak
Authors
Erol Kalkan, Krishna Banga, Hasan S. Ulusoy, Jon Peter B. Fletcher, William S. Leith, Shahneam Reza, Timothy Cheng
How many records should be used in ASCE/SEI-7 ground motion scaling procedure?
U.S. national building codes refer to the ASCE/SEI-7 provisions for selecting and scaling ground motions for use in nonlinear response history analysis of structures. Because the limiting values for the number of records in the ASCE/SEI-7 are based on engineering experience, this study examines the required number of records statistically, such that the scaled records provide accurate, efficient,
Authors
Juan C. Reyes, Erol Kalkan
Fluid‐driven seismicity response of the Rinconada fault near Paso Robles, California, to the 2003 M 6.5 San Simeon earthquake
The 2003 M 6.5 San Simeon, California, earthquake caused significant damage in the city of Paso Robles and a persistent cluster of aftershocks close to Paso Robles near the Rinconada fault. Given the importance of secondary aftershock triggering in sequences of large events, a concern is whether this cluster of events could trigger another damaging earthquake near Paso Robles. An epidemic‐type aft
Authors
Jeanne L. Hardebeck
Golden Gate Bridge response: a study with low-amplitude data from three earthquakes
The dynamic response of the Golden Gate Bridge, located north of San Francisco, CA, has been studied previously using ambient vibration data and finite element models. Since permanent seismic instrumentation was installed in 1993, only small earthquakes that originated at distances varying between ~11 to 122 km have been recorded. Nonetheless, these records prompted this study of the response of t
Authors
Mehmet Çelebi
The GED4GEM project: development of a Global Exposure Database for the Global Earthquake Model initiative
In order to quantify earthquake risk of any selected region or a country of the world within the Global Earthquake Model (GEM) framework (www.globalquakemodel.org/), a systematic compilation of building inventory and population exposure is indispensable. Through the consortium of leading institutions and by engaging the domain-experts from multiple countries, the GED4GEM project has been working t
Authors
P. Gamba, D. Cavalca, K. S. Jaiswal, C. Huyck, H. Crowley
Damping scaling of response spectra for shallow crustal earthquakes in active tectonic regions
No abstract available.
Authors
S. Rezaeian, Y. Bozorgnia, I.M. Idriss, K. Campbell, N. Abrahamson, W. Silva
Impact-based earthquake alerts with the U.S. Geological Survey's PAGER system: what's next?
In September 2010, the USGS began publicly releasing earthquake alerts for significant earthquakes around the globe based on estimates of potential casualties and economic losses with its Prompt Assessment of Global Earthquakes for Response (PAGER) system. These estimates significantly enhanced the utility of the USGS PAGER system which had been, since 2006, providing estimated population exposure
Authors
D. J. Wald, K. S. Jaiswal, K. D. Marano, D. Garcia, E. So, M. Hearne
Demand surge following earthquakes
Demand surge is understood to be a socio-economic phenomenon where repair costs for the same damage are higher after large- versus small-scale natural disasters. It has reportedly increased monetary losses by 20 to 50%. In previous work, a model for the increased costs of reconstruction labor and materials was developed for hurricanes in the Southeast United States. The model showed that labor cos
Authors
Anna H. Olsen
Holocene behavior of the Brigham City segment: implications for forecasting the next large-magnitude earthquake on the Wasatch fault zone, Utah
The Brigham City segment (BCS), the northernmost Holocene‐active segment of the Wasatch fault zone (WFZ), is considered a likely location for the next big earthquake in northern Utah. We refine the timing of the last four surface‐rupturing (~Mw 7) earthquakes at several sites near Brigham City (BE1, 2430±250; BE2, 3490±180; BE3, 4510±530; and BE4, 5610±650 cal yr B.P.) and calculate mean recurrenc
Authors
Stephen F. Personius, Christopher B. DuRoss, Anthony J. Crone
Extraordinary distance limits of landslides triggered by the 2011 Mineral, Virginia, earthquake
The 23 August 2011 Mineral, Virginia, earthquake (Mw 5.8) was the largest to strike the eastern U.S. since 1897 and was felt over an extraordinarily large area. Although no large landslides occurred, the shaking did trigger many rock and soil falls from steep river banks and natural cliffs in the epicentral area and from steep road cuts along, and northwest of, the Blue Ridge Parkway. We mapped th
Authors
Randall W. Jibson, Edwin L. Harp