Emergency Management Agency Inundation Map for Emergency Planning State of California California Geological Survey Goleta Quadrangle County of Santa Barbara University of Southern California 119°52'30"W 119°45'0"W

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N N O O M N N A Y T A Y L E I A N O N A P R D A M Y N M A A U A L C A N T A C S L L T M Y M T M T I A U A R A E E N C K IN D A H C Y E A T C U A S A U G O N Q Z E E W C N P U A IT S N T P E I G S W U A A N L T P M B L E A T B O K R N E C R K A O E E T A I T C Y K N D N E L T N T O T P A O A A M E P U U L N M A M C Q C D Y S A L A R X M R IS N C IC U O A A O S E A A F Y C X Z B R B U O R IS F U L C H A S K E N E N T K R S K S T N A C O E M T E C E O M L M P O F O M IV A E V R P A R L E E E L C O A N C U U M A O R F I L S O A E A P N L S C S R U O A O U IG D O L Z L IG N B A H F A M C S N A R N O IN S S I L A S L A S IN K A L T L IL A A A T N Z M P N E IL H G E U T E U U U H A N N H S N P G O S Y C O U H O R M C A C O T M O O V A A A N R L T C R M E N T P O N A R A O M A S E E D IN L T A K M N M L O N S N I IL O I L A P H D P U A L A E L Q S S L O N T A N T N O I K R Y L T IO A A T N R A E P A A I P A S C B R E E T A A E E C T U S T R T G N A IO O E A D C IG L L IN O V B P E C A A J B O A L S G A E G T R E T T U A N N C IT I P A H O S S P O W D

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METHOD OF PREPARATION TSUNAMI INUNDATION MAP MAP EXPLANATION

Initial tsunami modeling was performed by the University of Southern California (USC) FOR EMERGENCY PLANNING Tsunami Research Center funded through the California Emergency Management Agency Tsunami Inundation Line (CalEMA) by the National Tsunami Hazard Mitigation Program. The tsunami modeling process utilized the MOST (Method of Splitting ) computational program (Version 0), which allows for wave evolution over a variable bathymetry and topography State of California ~ County of Santa Barbara Tsunami Inundation Area used for the inundation mapping (Titov and Gonzalez, 1997; Titov and Synolakis, 1998).

The bathymetric/topographic data that were used in the tsunami models consist of a series of nested grids. Near-shore grids with a 3 arc-second (75- to 90-meters) GOLETA QUADRANGLE resolution or higher, were adjusted to “Mean High Water” sea-level conditions, representing a conservative sea level for the intended use of the tsunami modeling PURPOSE OF THIS MAP and mapping. This tsunami inundation map was prepared to assist cities and counties in identifying January 31, 2009 their tsunami hazard. It is intended for local jurisdictional, coastal evacuation A suite of tsunami source events was selected for modeling, representing realistic planning uses only. This map, and the information presented herein, is not a legal local and distant and hypothetical extreme undersea, near-shore document and does not meet disclosure requirements for real estate transactions (Table 1). Local tsunami sources that were considered include offshore reverse-thrust nor for any other regulatory purpose. faults, restraining bends on strike-slip zones and large submarine landslides SCALE 1:24,000 capable of significant seafloor displacement and tsunami generation. Distant tsunami The inundation map has been compiled with best currently available scientific sources that were considered include great zone events that are known to 0.5 0.25 0 0.5 1 information. The inundation line represents the maximum considered tsunami runup have occurred historically (1960 Chile and 1964 earthquakes) and others which Miles from a number of extreme, yet realistic, tsunami sources. Tsunamis are rare events; can occur around the Pacific Ocean “Ring of .” due to a lack of known occurrences in the historical record, this map includes no 1,000 500 0 1,000 2,000 3,000 4,000 5,000 information about the probability of any tsunami affecting any area within a specific In order to enhance the result from the 75- to 90-meter inundation grid data, a method Feet period of time. was developed utilizing higher-resolution digital topographic data (3- to 10-meters resolution) that better defines the location of the maximum inundation line (U.S. 0.5 0.25 0 0.5 1 Kilometers Please refer to the following websites for additional information on the construction Geological Survey, 1993; Intermap, 2003; NOAA, 2004). The location of the enhanced and/or intended use of the tsunami inundation map: inundation line was determined by using digital imagery and terrain data on a GIS platform with consideration given to historic inundation information (Lander, et al., State of California Emergency Management Agency, and Tsunami Program: 1993). This information was verified, where possible, by field work coordinated with Table 1: Tsunami sources modeled for the Santa Barbara County coastline. http://www.oes.ca.gov/WebPage/oeswebsite.nsf/Content/B1EC local county personnel. 51BA215931768825741F005E8D80?OpenDocument Areas of Inundation Map Coverage The accuracy of the inundation line shown on these maps is subject to limitations in and Sources Used Sources (M = moment magnitude used in modeled University of Southern California – Tsunami Research Center: the accuracy and completeness of available terrain and tsunami source information, and Santa event) Santa http://www.usc.edu/dept/tsunamis/2005/index.php the current understanding of tsunami generation and propagation phenomena as expressed Lompoc Barbara – Barbara in the models. Thus, although an attempt has been made to identify a credible upper Ventura State of California Geological Survey Tsunami Information: bound to inundation at any location along the coastline, it remains possible that actual Anacapa-Dume Fault X http://www.conservation.ca.gov/cgs/geologic_hazards/Tsunami/index.htm inundation could be greater in a major tsunami event. Channel Island Thrust Fault X X Local Goleta Offshore #1 X X National Oceanic and Atmospheric Agency Center for Tsunami Research (MOST model): Sources This map does not represent inundation from a single scenario event. It was created by Goleta Offshore Landslide #2 X X http://nctr.pmel.noaa.gov/time/background/models.html combining inundation results for an ensemble of source events affecting a given region 1927 Point Arguello Earthquake (M7.3) X (Table 1). For this reason, all of the inundation region in a particular area will not likely Central Aleutians Subduction Zone#1 (M8.9) X X be inundated during a single tsunami event. Central Aleutians Subduction Zone#2 (M8.9) X Central Aleutians Subduction Zone#3 (M9.2) X X X MAP BASE References: Chile North Subduction Zone (M9.4) X X X 1960 Chile Earthquake (M9.3) X X Topographic base maps prepared by U.S. Geological Survey as part of the 7.5-minute Distant Intermap Technologies, Inc., 2003, Intermap product handbook and quick start guide: 1964 Alaska Earthquake (M9.2) X X Quadrangle Map Series (originally 1:24,000 scale). Tsunami inundation line Sources Intermap NEXTmap document on 5-meter resolution data, 112 p. Cascadia Subduction Zone #2 (M9.2) X boundaries may reflect updated digital orthophotographic and topographic data that Subduction Zone #2 (M8.8) X can differ significantly from contours shown on the base map. Lander, J.F., Lockridge, P.A., and Kozuch, M.J., 1993, Tsunamis Affecting the West Coast Kuril Islands Subduction Zone #2 (M8.8) X of the 1806-1992: National Geophysical Data Center Key to Geophysical Kuril Islands Subduction Zone #3 (M8.8) X Record Documentation No. 29, NOAA, NESDIS, NGDC, 242 p. Kuril Islands Subduction Zone #4 (M8.8) X

National Atmospheric and Oceanic Administration (NOAA), 2004, Interferometric DISCLAIMER Synthetic Aperture Radar (IfSAR) Digital Elevation Models from GeoSAR platform (EarthData): The California Emergency Management Agency (CalEMA), the University of Southern 3-meter resolution data. California (USC), and the California Geological Survey (CGS) make no representation or warranties regarding the accuracy of this inundation map nor the data from which Titov, V.V., and Gonzalez, F.I., 1997, Implementation and Testing of the Method of Tsunami the map was derived. Neither the State of California nor USC shall be liable under any Splitting (MOST): NOAA Technical Memorandum ERL PMEL – 112, 11 p. circumstances for any direct, indirect, special, incidental or consequential damages with respect to any claim by any user or any third party on account of or arising from Titov, V.V., and Synolakis, C.E., 1998, Numerical modeling of tidal wave runup: the use of this map. Journal of Waterways, Port, Coastal and Ocean Engineering, ASCE, 124 (4), pp 157-171.

U.S. Geological Survey, 1993, Digital Elevation Models: National Mapping Program, Technical Instructions, Data Users Guide 5, 48 p.