Earthquake Fault Maps in Seattle and Washington State

Sometimes it is difficult to assess whether or not earthquake insurance is worth the price. At InsuranceOwl.org we believe one the major hurdles most people face is not being able to properly ascertain the risk an earthquake could have on their home and personal belongings. One of the best methods we have found to better understand your particular risk is to study the earthquake fault maps in Seattle and in the rest of Washington State. We have scoured the internet finding the best earthquake maps and have assembled them here for you.

Earthquake Fault Map — Puget Sound

Puget Sound Earthquake Fault Zones

Puget Sound Earthquake Fault Zones

This map shows the primary earthquake faults in the Puget Sound and other less prominent faults. This map is useful in showing the location and approximate length of faults but does not provide the impact an earthquake from a fault could have on the area surrounding. In the next section we will provide the impact studies conducted on each of the faults in Washington State.

This map shows the following faults: Devils Mountain, Utsalady Point, Strawberry Point, Mount Vernon Fault, Little River, Sequim, Southern Whidbey Island Fault, Cherry Creek, Tokul Creek,Rattlesnake Mountain Fault Zone, Lofall, Canyon River, Frigid Creek, Saddle Mountain faults, Hood Canal, Seattle Fault Zone, Tahuya Fault, Tacoma Fault Zone, East Passage, White River, Olympia Structure, Scammon Creek, Doty, Western Rainier Zone, Saint Helens Zone, and Olympic-Wallowa Lineament.

Top Twenty Earthquake Faults in Washington State

The Washington State of Department of Natural Resources conducted seismic research into the impact of the top twenty faults in Washington using a software program called Hazus. The program was developed by FEMA to assist in estimating the potential losses from earthquakes and other natural disasters. Government officials, business leaders, and citizens can use such estimates to design risk reduction activities and plan for emergency response and recovery.

Earthquake Fault Zones in Washington

The following earthquake faults in Washington State are ranked by the potential economic loss the particular earthquake scenario will have on the affected area. Other data included is the number of buildings damaged, fatalities, and injuries.

Seattle Fault

Earthquake Scenario: 7.2 Magnitude

Buildings Damaged: 487,382

Fatalities: 183 – 1,049

Injuries: 5,038 – 16,628

Economic Loss: $30,915,000,000

Cascadia Subduction Fault

Earthquake Scenario: 9.0 Magnitude

Buildings Damaged: 538,446

Fatalities: 62 – 288

Injuries: 3,404 – 7,246

Economic Loss: $21,000,000,000

South Whidbey Island Fault

Earthquake Scenario: 7.4 Magnitude

Buildings Damaged: 320,776

Fatalities: 90 – 432

Injuries: 2,920 – 7,361

Economic Loss: $15,590,000,000

SeaTac Fault

Earthquake Scenario: 7.2 Magnitude

Buildings Damaged: 375,954

Fatalities: 16 – 123

Injuries: 1,394 – 3,404

Economic Loss: $13,400,000,000

Tacoma Fault

Earthquake Scenario: 7.1 Magnitude

Buildings Damaged: 307,217

Fatalities: 64 – 328

Injuries: 2,350 – 5,742

Economic Loss: $13,150,000,000

Nisqually Fault

Earthquake Scenario: 7.2 Magnitude

Buildings Damaged: 268,047

Fatalities: 6 – 53

Injuries: 849 – 1,713

Economic Loss: $8,760,000,000

Cascadia North Fault

Earthquake Scenario: 8.3 Magnitude

Buildings Damaged: 154,359

Fatalities: 9 – 39

Injuries: 739 – 1,404

Economic Loss: $5,100,000,000

Devils Mountain West

Earthquake Scenario: 7.4 Magnitude

Buildings Damaged: 75,786

Fatalities: 15 – 61

Injuries: 555 – 1,058

Economic Loss: $3,370,000,000

Devils Mountain Fault

Earthquake Scenario: 7.1 Magnitude

Buildings Damaged: 39,631

Fatalities: 5 – 9

Injuries: 269 – 333

Economic Loss: $1,330,000,000

Hite – Walla Walla Fault

Earthquake Scenario: 6.8 Magnitude

Buildings Damaged: 18,705

Fatalities: 21 – 52

Injuries: 418 – 795

Economic Loss: $1,460,000,000

Saddle Mountain Fault

Earthquake Scenario: 7.35 Magnitude

Buildings Damaged: 39,631

Fatalities: 5 – 9

Injuries: 269 – 333

Economic Loss: $1,330,000,000

Canyon River Fault

Earthquake Scenario: 7.4 Magnitude

Buildings Damaged: 41,259

Fatalities: 0 – 3

Injuries: 81 – 108

Economic Loss: $1,200,000,000

Lake Creek Fault

Earthquake Scenario: 6.8 Magnitude

Buildings Damaged: 8,541

Fatalities: 3 – 13

Injuries: 128 – 240

Economic Loss: $1,000,000,000

Mill Creek Fault

Earthquake Scenario: 7.1 Magnitude

Buildings Damaged: 22,277

Fatalities: 2 – 6

Injuries: 146 – 185

Economic Loss: $687,000,000

Olympia Fault

Earthquake Scenario: 5.7 Magnitude

Buildings Damaged: 21,980

Fatalities: 0 – 1

Injuries: 60 – 93

Economic Loss: $639,000,000

Chelan Fault

Earthquake Scenario: 7.2 Magnitude

Buildings Damaged: 14,138

Fatalities: 0 – 2

Injuries: 34 – 42

Economic Loss: $584,000,000

Cle Elum Fault

Earthquake Scenario: 6.8 Magnitude

Buildings Damaged: 14,618

Fatalities: 0 – 1

Injuries: 47 – 55

Economic Loss: $499,000,000

Spokane Fault

Earthquake Scenario: 5.5 Magnitude

Buildings Damaged: 15,594

Fatalities: 0 – 1

Injuries: 34 – 36

Economic Loss: $450,000,000

St. Helens Fault

Earthquake Scenario: 7.0 Magnitude

Buildings Damaged: 12,766

Fatalities: 0 – 1

Injuries: 22 – 25

Economic Loss: $360,000,000

Boulder Creek Fault

Earthquake Scenario: 6.8 Magnitude

Buildings Damaged: 11,635

Fatalities: 0 – 1

Injuries: 13 – 16

Economic Loss: $229,000,000

Earthquake Insurance

With more than twenty faults, the risk of an earthquake powerful enough to cause serious damage to your home is a possibility that should be mitigated. Consider earthquake insurance in Seattle today!