STATE OF OREGON OPEN-FILE REPORT O-13-06 DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES www.OregonGeology.org Map of Earthquake and Tsunami Damage Potential for a W. Lawrence Givens, Governing Board Chair Ground Motion and Ground Deformation Data and Maps Vicki S. McConnell, Director and State Geologist for the 2012 Oregon Resilience Plan for Cascadia Andree V. Pollock, Assistant Director, Geologic Survey and Services Simulated Magnitude 9 Cascadia Earthquake Rachel L. Smith, Project Operations Manager Subduction Zone Earthquakes Ian P. Madin, Chief Scientist by Ian P. Madin and William J. Burns 2013 PLATE 7

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BACKGROUND LEGEND

This map was prepared by The Oregon Department of Geology and Mineral Industries (DOGAMI) for the use of the Oregon Seismic Safety Policy Advisory Commission in Cities completing the Oregon Resilience Plan for Cascadia Subduction Zone earthquakes. The map displays an estimate of the total potential damage due to ground shaking, ground Simulated Magnitude 9 Cascadia Earthquake failure (liquefaction and landslide), and tsunami inundation from a magnitude 9.0 Modified Mercalli Intensity Scale / Damage Potential Cascadia earthquake. This map is intended to provide nontechnical users with an estimate of the geographic distribution of damage. The damage categories are taken None: Felt indoors by many, outdoors by few, some awakened at night, from the Modified Mercalli Intensity scale, which is based on observed effects on people, IV Dishes, windows, doors, rattle and move, stationary cars rock. objects, and buildings. The damage potential categories are derived from the peak ground velocity map and tsunami inundation maps developed by DOGAMI for the Very Light: felt outdoors, sleepers wakened; liquids disturbed or spilled; Oregon Resilience Plan. Damage potential categories were assigned following the model V small unstable objects upset; doors swing, pictures move. of the U.S. Geological Survey ShakeMap program, and the tsunami inundation zone was assigned to the Very Heavy damage category, consistent with observations from recent great subduction earthquake tsunamis. See accompanying pamphlet for details. Light: felt by all; windows crack; dishes, glassware, books fall off shelves; pictures fall off VI walls; furniture moved; weak plaster, adobe buildings and poorly built masonry cracked.

Moderate: difficult to stand or walk; furniture broken; damage to poorly built masonry VII buildings; weak chimneys break; plaster, loose bricks, cornices, unbraced parapets and porches fall; some cracks in better masonry buildings. Astoria Warrenton Moderate/Heavy: steering of cars affected; extensive damage to unreinforced masonry VIII buildings, including partial collapse; fall of some masonry walls; twisting and falling of

Clatskanie Rainier Heavy: general panic; serious damage to collapse in old masonry buildings; wood frame 46°N IX structures rack and shift off foundations if unsecured; underground pipes broken. Gearhart

Seaside Very Heavy (Includes Tsunami Inundation Zone): poorly built structures 202 X 46°N 26 X destroyed with their foundations; bridges and well-built wooden structures heavily damaged and in need of replacement. 47 Cannon Beach 26

Vernonia St. Helens/Columbia City

53 Scappoose

47 WASHINGTON Hood River 84 Rockaway Beach Cascade Locks 30 6 6 30 282 30 120 206 The Dalles 281 Forest Grove/Cornelius 405 205 Portland/Metro Tillamook 26 217

43 219 212 141 224 Sandy

205 240 35 Newberg Wilsonville 173 Estacada 219 5 Canby 216 221 McMinnville 211

233 224 130 18 Woodburn Molalla Maupin 22 Sheridan 26 221 213

45°N 18B 18 197

Lincoln City 22 Silverton 99EB 45°N 97 22 Dallas Salem/Keizer 229 101 218 214 Monmouth 22 Depoe Bay 293 164 Stayton 22 182 223 229 164 22 226 20

Newport 180 Millersburg Toledo 99W Newport Albany Madras Corvallis Tangent 361 Philomath Lebanon

20 Waldport 34 99E 126 Sweet Home 99W 228

501 370

200 Harrisburg 242 Prineville Redmond Junction City 242 36 380

126 69 20 44°N 126 126 Veneta Eugene/Springfield Florence 225 222 Bend

200 97 44°N Dunes City Creswell 27

Cottage Grove

Oakridge Reedsport 99 38 58

101

Lakeside 99

99 138 429

North Bend Coos Bay 241 Sutherlin 101 540

138 97 42

Roseburg 138 Coquille 42 42S Bandon Winston 97 31 Myrtle Point 43°N 99 230

42 Myrtle Creek 542 43°N 99

62 250

Port Orford

99 227

99 Shady Cove 422

260 62 234 199 Eagle Point Gold Beach Grants Pass Rogue River 99 Central Point 140 199 140 Medford

Phoenix 140 238 97 255 Talent 70 Cave Junction 46 Ashland Klamath Falls 140 99

66 Brookings 273 42°N 39

42°N CALIFORNIA

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Coordinate System: NAD 1983 CORS96 Oregon Statewide Lambert Ft Intl Data layers: Earthquake and tsunami damage: DOGAMI; see Background text on this 0 10 20 30 40 50 Miles NOTICE For copies of this publication contact:

H Projection: Lambert Conformal Conic plate and accompanying pamphlet for details. Roads: Oregon Department of T R This map cannot serve as a substitute for site-specific investigations by qualified practitioners. Nature of the Northwest Information Center

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N Geographic Coordinate System: NAD 1983 CORS96 Transportation, 2008. Urban growth boundaries: Oregon Department of Land Site-specific data may give results that differ from those shown on the maps. The views and 800 NE Oregon Street, #28, Ste. 965

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Datum: NAD 1983 CORS96 Conservation and Development (DLCD) (2011). 0 25 50 Kilometers U R conclusions contained in this document are those of the authors and should not be interpreted as Portland, Oregon 97232

T Cartography by Ian P. Madin. necessarily representing the official policies, either expressed or implied, of the U.S. government. telephone (971) 673-2331