Florence L. Wong Eric L. Geist 2006 1 vector digital data Data Series 236 Western Coastal and Marine Geology, Menlo Park, CA U.S. Geological Survey, Coastal and Marine Geology Program http://pubs.usgs.gov/ds/2006/236/download/probzones.zip http://pubs.usgs.gov/ds/2006/236/catalog.shtml Florence L. Wong Angie J. Venturato Eric L. Geist 2006 1.0 Data Series 236 Western Coastal and Marine Geology, Menlo Park, CA U.S. Geological Survey, Coastal and Marine Geology Program http://pubs.usgs.gov/ds/2006/236/ PROBZONES is a generalized polygon layer outlining areas in the Seaside-Gearhart, Oregon, area subject to the 100-year and 500-year flood as determined by probabilistic tsunami hazard analysis (PTHA). This data set is one of a collection of digital files of a geographic information system of spatially referenced data related to the Seaside, Oregon, Tsunami Pilot Study. Federal Emergency Management Agency (FEMA) Federal Insurance Rate Map (FIRM) guidelines do not currently exist for conducting and incorporating tsunami hazard assessments that reflect the substantial advances in tsunami research achieved in the last two decades (Tsunami Pilot Study Working Group, 2006). Therefore, as part of FEMAs Modernization Program, a Tsunami Pilot Study was carried out in the Seaside/Gearhart, Oregon, area to provide information from which tsunami mapping guidelines could be developed. This area was chosen because it is typical of coastal communities in the section of the Pacific Coast from Cape Mendocino to the Strait of Juan de Fuca. There was also considerable interest shown by state agencies and local stakeholders in mapping the tsunami threat to this area. The study was an interagency effort by scientists from the U.S. Geological Survey, the National Oceanic and Atmospheric Administration, the University of Southern California, and the Middle East Technical University. We present the GIS data from that report in this publication. These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. 2005 ground condition Complete None planned -123.970020 -123.904470 46.060000 45.965441 USGS Metadata Identifier USGS:97ba1aa3-d817-4599-a36b-dc47d87492be None U.S. Geological Survey USGS Coastal and Marine Geology Program CMGP Western Coastal and Marine Geology WCMG probabilistic tsunami hazard analysis coastal geology PTHA tsunami probability tsunami hazard FEMA Flood Insurance Rate Map USGS Thesaurus tsunamis geospatial datasets ISO 19115 Topic Category environment geoscientificInformation oceans Geographic Names Information System Seaside, Oregon Gearhart, Oregon Oregon USA United States North America GEOnet Names Server north Pacific Ocean None. The data, digital results, GIS layers, and map products in this database have been created specifically as part of a pilot study for FEMA's modernization of Flood Insurance Rate Maps (FIRMs) project. The results of the pilot study are intended to help FEMA draft new guidelines related to tsunami flooding for Coastal Flood Hazard Analysis and Mapping for the Pacific Coast of the United States. The results are intrinsically probabilistic and designed according to FEMA flood zone specifications: annual probabilities of exceedance of 1% and 0.2%. The data, digital results, GIS layers, and map products are not intended for other uses. In particular, the 1% and 0.2% annual exceedance probability tsunami flood maps are not to be used for emergency planning, evacuation, or other insurance purposes. Please refer to the National Tsunami Hazard Mitigation Program tsunami inundation maps for use in emergency planning. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Florence L. Wong U.S. Geological Survey Geologist mailing and physical address

345 Middlefield Road, MS 999

Menlo Park California 94025 USA 650-329-5327 650-329-5190 fwong@usgs.gov http://pubs.usgs.gov/ds/2006/236/metadata/probzones.jpg 100- and 500-year flood zones as determined by probabilistic tsunami hazard analysis. JPEG Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722 Tsunami Pilot Study Working Group 2006 1 Open-File Report 2006-1234 Western Coastal and Marine Geology, Menlo Park, California U.S. Geological Survey, Coastal and Marine Geology Program http://pubs.usgs.gov/of/2006/1234/ Mofjeld, H.O., Venturato, A.J., Gonz\341lez, F.I., and Titov, V.V. 2004 NOAA, Technical Memorandum; OAR PMEL-126; 15 pages http://www.pmel.noaa.gov/pubs/PDF/mofj2736/mofj2736.pdf Eric L. Geist 2005 Professional Paper 1661-B Menlo Park, California U.S. Geological Survey, Coastal and Marine Geology Program 21 pages http://pubs.usgs.gov/pp/pp1661b/ The polygon attribute for this data set is either the 100- or 500-year flood area as determined by the probabilistic tsunami hazard analysis. The accuracy of one or the other value assignment is tied to the model accuracy, the discussion of which is copied here. The maximum wave heights presented here were modeled by probabilistic tsunami hazard analysis techniques and approximate the magnitudes of a 1% annual probability flood. Accuracy with these estimates can be associated with uncertainty in the model results. Sources of aleatory uncertainty from fault rupture complexity and tidal stage at tsunami arrival time. For the former, the coefficient of variation is typically 20% (Geist, 2005). For the latter, the coefficient of variation is typically 7% (Mofjeld and others, 2004). A comprehensive analysis for other sources of aleatory and epistemic uncertainty has not been conducted for this pilot study. Polygon topology is intact. Complete. The model raster from which this data set was derived was defined on a 2-second grid spacing (approximately 60 meters north-south) which was maintained through all calculations. Angie J. Venturato 2005 raster digital data NOAA, Technical Memorandum OAR; PMEL-129 http://www.pmel.noaa.gov/pubs/PDF/vent2812/vent2812.pdf online 2005 publication date Venturato, 2005 mean lower low water line The extents of the 100- and 500-year maps from the Probabilistic Tsunami Hazard Analysis (Tsunami Pilot Study Working Group, 2006) were combined with the mean lower low water line (Venturato, 2005) to define these polygons. 2005 Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 20201019 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Edited metadata for minor typos and to bring it up to PCMSC standards, including adding USGS Thesaurus keyword terms. No data were changed. 20211008 U.S. Geological Survey Susan Cochran Geologist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Vector G-polygon 2 Label point 4 GT-polygon composed of chains 4 Point 4 0.0006 0.0006 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 probzones polygon shapefile ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA area from polygon coverage ESRI Feature area PERIMETER perimeter from polygon coverage ESRI Feature perimeter NEWZONE_ feature number ESRI ESRI internal number NEWZONE_ID user feature number author user-assigned feature number PTYPE polygon label author A 100-year flood polygon probabilistic tsunami hazard analysis B 500-year flood polygon probabilistic tsunami hazard analysis U.S. Geological Survey mailing address

Information Services

Box 25286

Denver Colorado 80225-0286 USA 1-888-275-8747 infoservices@usgs.gov Downloadable Data: probzones; U.S. Geological Survey Data Series 236 Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. shapefile 9.1 ESRI polygon shapefile 0.093 http://pubs.usgs.gov/ds/2006/236/download/probzones.zip http://pubs.usgs.gov/ds/2006/236/catalog.shtml Data may be downloaded via the World Wide Web (WWW). None These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. 20211008 U.S. Geological Survey Florence L. Wong Geologist mailing and physical address

345 Middlefield Road, MS 999

Menlo Park California 94025 USA 650-329-5327 650-329-5190 fwong@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None