NGA-West2 Database

Abstract

The NGA-West2 project database expands on its predecessor to include worldwide ground motion data recorded from shallow crustal earthquakes in active tectonic regimes post-2000 and a set of small-to-moderate-magnitude earthquakes in California between 1998 and 2011. The database includes 21,336 (mostly) three-component records from 599 events. The parameter space covered by the database is M 3.0 to M 7.9, closest distance of 0.05 to 1,533 km, and site time-averaged shear-wave velocity in the top 30 m of V S30 = 94 m/s to 2,100 m/s (although data becomes sparse for distances >400 km and V S30 > 1,200 m/s or <150 m/s). The database includes uniformly processed time series and response spectral ordinates for 111 periods ranging from 0.01 s to 20 s at 11 damping ratios. Ground motions and metadata for source, path, and site conditions were subject to quality checks by ground motion prediction equation developers and topical working groups.

The probabilistic seismic hazard assessment of Germany—version 2016, considering the range of epistemic uncertainties and aleatory variability

“…During the course of this national hazard project, several high quality strong-motion datasets became available: the RESORCE European and Middle East Reference database for seismic ground-motions in Europe (Akkar et al 2014;Douglas et al 2014a) and the NGA-West2 dataset (Ancheta et al 2014;Gregor et al 2014). A major update of the broadband (mainly Japanese based) model of the Cauzzi and Faccioli (2008) model was also published (Cauzzi et al 2015).…”

“…The NGA-West-2 database branch is considered by the GMPE of Bindi et al (2017) and the mainly Japanese based data by Cauzzi et al (2015). Starting from the NGA-West 2 flat-file (Ancheta et al 2014), the Bindi et al (2017) model proposes a model tailored to hazard application in moderate and low seismicity areas in terms of data selection and implemented functional form (e.g. development of pairs of equations, one using an extended-source distance metric, the other a point-source measure).…”

“…First, we differentiate the principle data source of GMPEs with European-Middle East data with the weight of 0.5. Global and Californian recordings, specifically the NGA2-West data (Ancheta et al 2014), were represented by the GMPE of Bindi et al (2017) and given a weight of 0.25. The same weight is given to the other global data set with the focus on Japanese recordings with the respective GMPE by Cauzzi et al (2014) and Bindi et al (2014) as additional branches with equal weights of 0.167 each.…”

The influence of coupled horizontal–vertical ground excitations on the collapse margins of modern RC-MRFs

“…However, this approach is inaccurate for nearsource moderate and large earthquakes (Friedland et al 1997;Bozorgnia et al 1999;Bozorgnia and Campbell 2004;Button et al 2002). To clarify this issue, a large set of earthquake records were extracted from NGA-WEST2 (Ancheta et al 2012(Ancheta et al , 2013Pacific Earthquake Engineering Research Center 2015) dataset to compare the peak vertical to horizontal ground acceleration (V/H ratio) at different ground motion magnitudes and distances. Figure 12 shows the detailed comparison.…”

“…If the ground motion selection would be done in a way that the hazard consistency is ensured, then the results from the corresponding simulation and analysis would be rational. According to the recommendations of FEMA P-695 (2009), 40 earthquake ground motion records at varying hazard levels from 20 earthquake events are selected from the PEER NGA-WEST2 (Ancheta et al 2012(Ancheta et al , 2013Pacific Earthquake Engineering Research Center 2015) database (Table 1). This database is the most recent and very suitable for adequate fragility analysis.…”