Map of Earthquake and Tsunami Damage Potential ... - Oregon
[Pages:1]STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES
W. Lawrence Givens, Governing Board Chair Vicki S. McConnell, Director and State Geologist Andree V. Pollock, Assistant Director, Geologic Survey and Services Rachel L. Smith, Project Operations Manager Ian P. Madin, Chief Scientist
Map of Earthquake and Tsunami Damage Potential for a Simulated Magnitude 9 Cascadia Earthquake
2013
OPEN-FILE REPORT O-13-06
Ground Motion and Ground Deformation Data and Maps for the 2012 Oregon Resilience Plan for Cascadia Subduction Zone Earthquakes
by Ian P. Madin and William J. Burns
PLATE 7
125?W 46?N 45?N 44?N
124?W
123?W
122?W
121?W
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 in 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 failure (liquefaction and landslide), and tsunami inundation from a magnitude 9.0 Cascadia earthquake. This map is intended to provide nontechnical users with an estimate of the geographic distribution of damage. The damage categories are taken from the Modified Mercalli Intensity scale, which is based on observed effects on people, objects, and buildings. The damage potential categories are derived from the peak ground velocity map and tsunami inundation maps developed by DOGAMI for the Oregon Resilience Plan. Damage potential categories were assigned following the model 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.
LEGEND
Cities
Simulated Magnitude 9 Cascadia Earthquake Modified Mercalli Intensity Scale / Damage Potential
IV None: Felt indoors by many, outdoors by few, some awakened at night, Dishes, windows, doors, rattle and move, stationary cars rock.
V
Very Light: felt outdoors, sleepers wakened; liquids disturbed or spilled; small unstable objects upset; doors swing, pictures move.
VI
Light: felt by all; windows crack; dishes, glassware, books fall off shelves; pictures fall off walls; furniture moved; weak plaster, adobe buildings and poorly built masonry cracked.
Warrenton Astoria
Gearhart Seaside
26
Cannon Beach
26
Clatskanie
Rainier
202 47
Vernonia St. Helens/Columbia City
VII
Moderate: difficult to stand or walk; furniture broken; damage to poorly built masonry buildings; weak chimneys break; plaster, loose bricks, cornices, unbraced parapets and porches fall; some cracks in better masonry buildings.
VIII Moderate/Heavy: steering of cars affected; extensive damage to unreinforced masonry buildings, including partial collapse; fall of some masonry walls; twisting and falling of
IX Heavy: general panic; serious damage to collapse in old masonry buildings; wood frame structures rack and shift off foundations if unsecured; underground pipes broken.
X
Very Heavy (Includes Tsunami Inundation Zone): poorly built structures deXstroyed with their foundations; bridges and well-built wooden structures heavily
46?N
damaged and in need of replacement.
53
Rockaway Beach Tillamook
Scappoose
47
WASHINGTON
Hood River
Cascade Locks
30
84
6
6
120
Forest Grove/Cornelius
405
205
Portland/Metro
217
26
30
282
30
206
The Dalles
281
43
219
141
212
224
Sandy
205
240
Newberg Wilsonville
Estacada
35 173
219
5 Canby
216
McMinnville 221
211
233
130
18
Woodburn
Molalla
224
22
Sheridan
221
213
18B 18
Maupin
26
197
Lincoln City
22
Silverton
99EB
Dallas 22 Salem/Keizer
101
229
Depoe Bay
Monmouth
22
214
182
229
223
164
Stayton 22
164
20
226
22
Newport
180
Millersburg
Toledo
99W
Newport
Albany
Corvallis
Philomath
Tangent
Lebanon
45?N
97 218
293
Madras
361
Waldport 34
126
Florence Dunes City
501 36 126
99E 99W
20
Sweet Home
228
200 Harrisburg Junction City
126 69
Veneta Eugene/Springfield
225
222
200
Creswell
126 242
370
242
Prineville
Redmond
380
20
Bend
97
44?N
27
Reedsport
38 101
Lakeside
Cottage Grove
99
99
Oakridge
58
138
99
North Bend Coos Bay 241
101 540
42
Sutherlin
138
Bandon
Coquille
42S
Roseburg
42
Winston
Myrtle Point
43?N
99
42
Myrtle Creek
542
99
250
Port Orford
99
227
429
138 230 62
97 97
31
43?N
99
Shady Cove
422
Gold Beach
260
62
199
Grants Pass Rogue River
234
Eagle Point
99
199
Central Point
140
140
Medford
Phoenix
255
238
Talent
Cave Junction 46
Ashland
99
140 97
Klamath Falls
70
140
Brookings
42?N
66 273
39
42?N
CALIFORNIA
124?W
123?W
122?W
121?W
Coordinate System: NAD 1983 CORS96 Oregon Statewide Lambert Ft Intl Projection: Lambert Conformal Conic
Data layers: Earthquake and tsunami damage: DOGAMI; see Background text on this plate and accompanying pamphlet for details. Roads: Oregon Department of
0
Geographic Coordinate System: NAD 1983 CORS96
Transportation, 2008. Urban growth boundaries: Oregon Department of Land
Datum: NAD 1983 CORS96
Conservation and Development (DLCD) (2011).
0
Cartography by Ian P. Madin.
10
20
25
30
40
50 Kilometers
50 Miles
TRUE NORTH
NOTICE This 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 and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. government.
For copies of this publication contact: Nature of the Northwest Information Center
800 NE Oregon Street, #28, Ste. 965 Portland, Oregon 97232
telephone (971) 673-2331
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