Tsunami Inundation Hazard Zone (2021 Update, from DataSF)

California Tsunami Hazard Area Maps and data are prepared to assist cities and counties in identifying their tsunami hazard for tsunami response planning. The maps and data are compiled with the best currently available scientific information and represent areas that could be exposed to tsunami hazards during a tsunami event. They are primarily based on inundation limits corresponding to a 975-year average return period tsunami event model. These limits have been extended to reflect potential local tsunami sources not considered in probabilistic analysis and are also modified to reflect the practical need to define limits that coincide with geographic features or city streets. State of California, 2021, Tsunami Hazard Area Map, County name County; produced by the California Geological Survey, the California Governor's Office of Emergency Services, and AECOM; dated date on the map, mapped at multiple scales. Data pushed to ArcGIS Online on October 1, 2025 at 11:28 AM by SFGIS. Data from: https://data.sfgov.org/d/7p2k-c3z6 Description of dataset columns: the_geom Geographic Extent OBJECTID Object ID Evacuate Evacuate County County Name GIS_Link Link to Data KMZ_Link Link to Data Map_Link Label Shape_Leng Shape_Le_1 Shape_Area Note: If no description was provided by DataSF, the cell is left blank. See the source data for more information.本加利福尼亚州海啸灾害区域地图及数据集旨在协助各市县识别自身面临的海啸灾害风险，用于海啸应对规划工作。本套地图与数据集基于当前可获取的最优科学信息编制，涵盖了海啸事件发生期间可能遭受海啸灾害影响的区域。其核心依据为对应975年平均重现期的海啸事件模型的淹没范围。上述淹没范围已进行延伸，以纳入概率分析中未被考虑的潜在本地海啸源；同时也根据实际需求进行了调整，以使划定的范围与地理特征或城市街道相契合。 本数据集由加利福尼亚州地质调查局（California Geological Survey）、加利福尼亚州州长应急服务办公室（California Governor's Office of Emergency Services）及AECOM联合编制，2021年发布的《加利福尼亚州海啸灾害区域地图》以各市县为单位进行标注，采用多种比例尺制作，地图标注有制作日期。该数据集于2025年10月1日上午11:28由SFGIS推送至ArcGIS Online平台。 数据来源：https://data.sfgov.org/d/7p2k-c3z6 数据集列项说明如下： the_geom：地理范围 OBJECTID：对象ID Evacuate：疏散标识 County：市县名称 GIS_Link：数据链接 KMZ_Link：数据链接 Map_Link：地图标注 Shape_Leng：形状长度 Shape_Le_1：形状长度 Shape_Area：形状面积 注：若DataSF未提供对应字段的描述信息，则该单元格留空。更多详细信息请参阅源数据集。