Bedrock ground motions for a synthetic Portland Hills Fault M 6.8 earthquake, northwestern Oregon and Southwestern Washington, USA

Oregon Department of Geology and Mineral Industries Bedrock ground motions for a synthetic Portland Hills Fault M 6.8 earthquake, northwestern Oregon and Southwestern Washington, USA vector digital data Oregon Department of Geology and Mineral Industries Open-File Report Open-File Report O-18-02 Portland, Oregon, USA Oregon Department of Geology and Mineral Industries http://www.oregongeology.org Oregon Department of Geology and Mineral Industries 2018 Earthquake regional impact analysis for Clackamas, Multnomah, and Washington Counties, Oregon file geodatabase Oregon Department of Geology and Mineral Industries Open-File Report Open-File Report O-18-02 Portland, Oregon, USA Oregon Department of Geology and Mineral Industries http://www.oregongeology.org/ Bedrock ground motions for a synthetic Portland Hills Fault M 6.8 earthquake, (firm rock condition, Vs30 = 760 m/sec). US Geologic Survey-supplied ground motion data includes peak ground acceleration, peak ground velocity, and spectral acceleration at 0.3 and 1.0 seconds Developing bedrock ground motion raster data for a synthetic Portland Hills Fault M 6.8 earthquake event. Bedrock ground motion data provided by USGS Earthquake Hazards Program, Arthur D. FrankeA. Frankel, US Geological Survey, based on fault parameters specified by DOGAMI, and converted to a GIS pointfile. 2018 Complete None planned -124.200000 -121.200000 46.500000 44.500000 ISO 19115 Topic Category geoscientificinformation Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus earthquake active fault ground motion ground shaking strong motion earthquake hazard earthquake occurrence acceleration Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus Oregon Washington Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus bedrock subsurface crust Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus None Data distributed under terms of a Data Sharing Agreement. Data not to be used outside the terms of that agreement. REPORT DATA: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. See the accompanying text report for more details on the limitations of the methods and data used to prepare this publication. Oregon Department of Geology and Mineral Industries mailing and physical address

800 NE Oregon Street Suite 965

Portland Oregon 97232 USA 1 971 673 1555 1 971 673 1562 dogami-info@oregon.gov When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from http://www.oregongeology.org John Bauer Oregon Department of Geology and Mineral Industries Geohazards Analyst Dept. of Homeland Security Urban Area Security Initiative grant Unclassified Attribute quantities were compared with other previously published estimates of a Portland Hills Fault ground motion; recognizing the different parameters of this fault. All values were comparable. All points have values. GIS graphical representations of all ground motion attributes showed the expected attenuation patterns. Overall region extends well beyond the fault location, extending into the Pacific Ocean on the west, Polk County on the south, Wasco County on the east, and Lewis (Washington) Counties, where the bedrock ground motion is less than 0.04 g pga. Horizontal positional accuracy is driven by the specified locations of the fault that were provided to USGS, which are an approximation of the poorly understood fault. The fault locations are for an earthquake scenario and should not be interpreted as exact locations of the fault. not applicable USGS Earthquake Hazards Program 2016 Unpublished data, Bedrock ground motion for a M 6.8 Portland Hills Fault vector digital data Seattle, Washington USGS Earthquake Hazards Program 2016 DOGAMI provided fault coordinates and other parameters on the fault to USGS Earthquake Hazards Program, Arthur D. Frankel, Coordinates: (45.735, -122.902), (45.646, -122.846), (45.58243, -122.76974), (45.52439, -122.69643), (45.5218, -122.6907), (45.3, -122.492). USGS returned bedrock ground motion in tabular format in 0.01 degree increments. Tabular format converted to GIS pointfile format for geoprocessing purposes. Oregon Department of Geology and Mineral Industries mailing and physical address

800 NE Oregon Street Suite 965