Basin and Range Province Earthquake Working Group II-Recommendations to the U.S. Geological Survey National Seismic Hazard Mapping Program for the 2014 update of the National Seismic Hazard Maps

2012 ◽  
Keyword(s):  
Seismic Hazard ◽  
Working Group ◽  
Basin And Range ◽  
Geological Survey ◽  
Hazard Mapping ◽  
Hazard Maps ◽  
Basin And Range Province ◽  
Seismic Hazard Maps ◽  
The U.S ◽  
Mapping Program

Seismic Hazard Mapping of California considering Site Effects

2010 ◽  
Vol 26 (4) ◽  
pp. 1039-1055 ◽  
Author(s):  
Erol Kalkan ◽  
Chris J. Wills ◽  
David M. Branum
Keyword(s):  
Seismic Hazard ◽  
Site Effects ◽  
Hazard Mapping ◽  
Spectral Acceleration ◽  
Hazard Map ◽  
Hazard Maps ◽  
Seismic Hazard Maps ◽  
Geologic Map ◽  
Seismic Hazard Map ◽  
The U.S

In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire state for each VS30 value. By merging seismic hazard maps based on the seven different VS30 values, a suite of seismic hazard maps was computed for 0.2 and 1.0 s spectral ordinates at 2% probability of exceedance (PE) in 50 years. The improved hazards maps explicitly incorporate the site effects and their spatial variability on ground motion estimates. The spectral acceleration (SA) at 1.0 s map of seismic shaking potential for California has now been published as California Geological Survey Map Sheet 48.

Implementation of NGA-West2 Ground Motion Models in the 2014 U.S. National Seismic Hazard Maps

2014 ◽  
Vol 30 (3) ◽  
pp. 1319-1333 ◽  
Author(s):  
Sanaz Rezaeian ◽  
Mark D. Petersen ◽  
Morgan P. Moschetti ◽  
Peter Powers ◽  
Stephen C. Harmsen ◽  
...  
Keyword(s):  
United States ◽  
Seismic Hazard ◽  
Ground Motion ◽  
The United States ◽  
Hazard Maps ◽  
Seismic Hazard Maps ◽  
Motion Models ◽  
Seismic Source Models ◽  
Ground Motion Models ◽  
The U.S

The U.S. National Seismic Hazard Maps (NSHMs) have been an important component of seismic design regulations in the United States for the past several decades. These maps present earthquake ground shaking intensities at specified probabilities of being exceeded over a 50-year time period. The previous version of the NSHMs was developed in 2008; during 2012 and 2013, scientists at the U.S. Geological Survey have been updating the maps based on their assessment of the “best available science,” resulting in the 2014 NSHMs. The update includes modifications to the seismic source models and the ground motion models (GMMs) for sites across the conterminous United States. This paper focuses on updates in the Western United States (WUS) due to the use of new GMMs for shallow crustal earthquakes in active tectonic regions developed by the Next Generation Attenuation (NGA-West2) project. Individual GMMs, their weighted combination, and their impact on the hazard maps relative to 2008 are discussed. In general, the combined effects of lower medians and increased standard deviations in the new GMMs have caused only small changes, within 5–20%, in the probabilistic ground motions for most sites across the WUS compared to the 2008 NSHMs.

Effect of Time Dependence on Probabilistic Seismic-Hazard Maps and Deaggregation for the Central Apennines, Italy

2009 ◽  
Vol 99 (2A) ◽  
pp. 585-610 ◽  
Author(s):  
A. Akinci ◽  
F. Galadini ◽  
D. Pantosti ◽  
M. Petersen ◽  
L. Malagnini ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Time Dependence ◽  
Probabilistic Seismic Hazard ◽  
Hazard Maps ◽  
Central Apennines ◽  
Seismic Hazard Maps
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