The 2018 National Seismic Hazard Assessment (NSHA) - Derived Geo-spatial Product

As part of the 2018 National Seismic Hazard Assessment (NSHA), we compiled the geographic information system (GIS) dataset to enable end-users to view and interrogate the NSHA18 outputs on a spatially enabled platform. It is intended to ensure the NSHA18 outputs are openly available, discoverable and accessible to both internal and external users. This geospatial product is derived from the dataset generated through the development of the NSHA18 and contains uniform probability hazard maps for a 10% and 2% chance of exceedance in 50 years. These maps are calculated for peak ground acceleration (PGA) and a range of response spectral periods, Sa(T), for T = 0.1, 0.2, 0.3, 0.5, 1.0, 2.0 and 4.0 s. Additionally, hazard curves for each ground-motion intensity measure as well as uniform hazard spectra at the nominated exceedance probabilities are calculated for key localities.

作为2018年国家地震危险性评估（National Seismic Hazard Assessment, NSHA）的组成部分，我们编制了地理信息系统（GIS）数据集，以便终端用户可在空间化平台上查看与查询NSHA18的输出成果。本数据集旨在确保NSHA18的输出成果可对内外部用户开放获取、可被发现且易于访问。该地理空间产品源自NSHA18编制过程中生成的数据集，包含50年超越概率分别为10%和2%的均匀概率危险性图。此类危险性图针对峰值地面加速度（Peak Ground Acceleration, PGA）以及一系列反应谱周期Sa(T)计算得到，其中T分别取值为0.1、0.2、0.3、0.5、1.0、2.0和4.0秒。此外，本数据集还针对重点区域计算了各地面运动强度指标对应的危险性曲线，以及指定超越概率下的均匀危险谱。