Portland/Metro

Bend

Salem/Keizer

Eugene/Springfield

Medford

CorvallisAlbany

Klamath Falls

Coos Bay

Roseburg

Redmond

Warrenton

Lebanon

Grants Pass

Florence

Ashland

McMinnville

Dallas

Prineville

Canby

Lincoln City

WilsonvilleNewberg

The Dalles

Astoria

Newport

Sutherlin

Stayton

MadrasNewport

Woodburn

Toledo

Brookings

Bandon

Port Orford

Sandy

Rainier

Tangent

Sweet Home

Seaside

North Bend

Silverton

Coquille

Gold Beach

Millersburg

Winston

Reedsport

Estacada

Myrtle Creek

Philomath

Molalla

Veneta

Central Point

Forest Grove/Cornelius

Scappoose

St. Helens/Columbia City

Hood River

Waldport

Dunes City

Cottage Grove

Talent

Monmouth

Sheridan

Eagle Point

Junction City

Oakridge

Lakeside

Tillamook

Rogue River

Gearhart

Maupin

Creswell

Cave Junction

Phoenix

Shady Cove

Clatskanie

Vernonia

Harrisburg

Depoe Bay

Myrtle Point

Cascade LocksRockaway Beach

Cannon Beach

5

84

205405

205

97

101

30

20

26

197

199

26

199

101

26

30

97

97

20

26

101

97

20

30

97

31

58

22

140

138

36

6

99

126

242

214

200

223

99E

380

216

202

238

211

230

35

38

18

228

255

34

226

66

221

219

62

99W

42

46

213

47

370

224

42S

180

229

206

27

234

39

542

53

273

281

260

361

240

227

43

69

540

501

130

218

212

164

217

233

70

241

293

250

18B

141

222

99EB

173

282

422

120

225

429

182

99

99

18

47

42

224

126

99

99

126

140

99

22

6

138

219

138

99

221

42

164

22

140

22

22

126

62

22

99W

140

99

200

99

229

242

121°W

121°W

122°W

122°W

123°W

123°W

124°W

124°W125°W

46°N

46°N

45°N

45°N

44°N

44°N

43°N

43°N

42°N

42°N

WASHINGTON

CALIFORNIA

STATE OF OREGONDEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIESwww.OregonGeology.orgW. Lawrence Givens, Governing Board ChairVicki S. McConnell, Director and State GeologistAndree V. Pollock, Assistant Director, Geologic Survey and ServicesRachel L. Smith, Project Operations ManagerIan P. Madin, Chief Scientist

2013

Map of Earthquake and Tsunami Damage Potential for aSimulated Magnitude 9 Cascadia Earthquake

BACKGROUND

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 incompleting the Oregon Resilience Plan for Cascadia Subduction Zone earthquakes. Themap displays an estimate of the total potential damage due to ground shaking, groundfailure (liquefaction and landslide), and tsunami inundation from a magnitude 9.0Cascadia earthquake. This map is intended to provide nontechnical users with anestimate of the geographic distribution of damage. The damage categories are takenfrom the Modified Mercalli Intensity scale, which is based on observed effects on people,objects, and buildings. The damage potential categories are derived from the peakground velocity map and tsunami inundation maps developed by DOGAMI for theOregon Resilience Plan. Damage potential categories were assigned following the modelof the U.S. Geological Survey ShakeMap program, and the tsunami inundation zone wasassigned to the Very Heavy damage category, consistent with observations from recentgreat subduction earthquake tsunamis. See accompanying pamphlet for details.

OPEN-FILE REPORT O-13-06Ground Motion and Ground Deformation Data and Maps

for the 2012 Oregon Resilience Plan for CascadiaSubduction Zone Earthquakes

by Ian P. Madin and William J. Burns

PLATE 7

LEGEND

Cities

Data layers: Earthquake and tsunami damage: DOGAMI; see Background text on thisplate and accompanying pamphlet for details. Roads: Oregon Department ofTransportation, 2008. Urban growth boundaries: Oregon Department of LandConservation and Development (DLCD) (2011).Cartography by Ian P. Madin.

For copies of this publication contact:Nature of the Northwest Information Center

800 NE Oregon Street, #28, Ste. 965Portland, Oregon 97232

telephone (971) 673-2331

Coordinate System: NAD 1983 CORS96 Oregon Statewide Lambert Ft IntlProjection: Lambert Conformal ConicGeographic Coordinate System: NAD 1983 CORS96Datum: NAD 1983 CORS96

NOTICEThis map cannot serve as a substitute for site-specific investigations by qualified practitioners.Site-specific data may give results that differ from those shown on the maps. The views andconclusions contained in this document are those of the authors and should not be interpreted asnecessarily representing the official policies, either expressed or implied, of the U.S. government.TR

UE N

ORTH

0 25 50 Kilometers

0 10 20 30 40 50 Miles

Simulated Magnitude 9 Cascadia EarthquakeModified Mercalli Intensity Scale / Damage Potential

X

Very Light: felt outdoors, sleepers wakened; liquids disturbed or spilled;small unstable objects upset; doors swing, pictures move.

None: Felt indoors by many, outdoors by few, some awakened at night,Dishes, windows, doors, rattle and move, stationary cars rock.

Heavy: general panic; serious damage to collapse in old masonry buildings; wood framestructures rack and shift off foundations if unsecured; underground pipes broken.

Light: felt by all; windows crack; dishes, glassware, books fall off shelves; pictures fall offwalls; furniture moved; weak plaster, adobe buildings and poorly built masonry cracked.

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

Very Heavy (Includes Tsunami Inundation Zone): poorly built structuresdestroyed with their foundations; bridges and well-built wooden structures heavilydamaged and in need of replacement.

IV

V

X

IX

VIII

VII

VI