What damage a Cascadia Subduction Zone earthquake can do?

A Cascadia Subduction earthquake will impact an estimated 140,000 square miles, an area nearly as large as the size of California. The impacted area will include the large metropolitan cities Seattle, Tacoma, Portland, Eugene, and both State Capitals of Oregon (Salem) and Washington (Olympia).

What damage did the Cascadia earthquake cause?

Earthquake deaths ranging from 650 to 5,000, with another 600 to 5,000 deaths due to the tsunami. 24,000 buildings completely destroyed, and another 85,000 with extensive damage requiring months to years of repair. Approximately $32 billion in economic losses. 27,600 displaced households.

Why is the Cascadia Subduction Zone so dangerous?

Because of the great length of the fault, the Cascadia Subduction Zone is capable of producing very large earthquakes if rupture occurs along its entire length.

What areas are affected by the Cascadia fault?

The Cascadia Subduction Zone (CSZ) “megathrust” fault is a 1,000 km long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino California. It separates the Juan de Fuca and North America plates.

What is the potential damage to the Washington coast if the Cascadia earthquake occurs?

FEMA projects that nearly thirteen thousand people will die in the Cascadia earthquake and tsunami. Another twenty-seven thousand will be injured, and the agency expects that it will need to provide shelter for a million displaced people, and food and water for another two and a half million.

What happened in the Cascadia Subduction Zone in early 1700 What effect did this event have in Japan?

The earthquake was likely around magnitude 9 and occurred in the Cascadia Subduction Zone. 1700: A massive earthquake strikes the Pacific Northwest coast, sending a tsunami racing across the ocean all the way to Japan. The earthquake was likely around magnitude 9 and occurred in the Cascadia Subduction Zone.

How bad will the Cascadia earthquake be?

Because the epicenter of the earthquake will be offshore, by the time the intensity and energy of the earthquake reaches the Seattle and Portland areas, most experts predict it will be in the 6 to 7 magnitude range of intensity. This sudden movement of land usually triggers a tsunami.

How did the Cascadia Subduction Zone form?

Location of cascadia Subduction Zone (CSZ) It formed as the ocean crust of the Juan de Fuca Plate, subducts beneath the North American Plate. The fault runs about 50 miles offshore for 1094 kilometers (680 miles). The plates are locked and strain is building in the rocks.

Where would the Cascadia Subduction Zone rupture?

Stresses have now been building along the Cascadia subduction zone for 320 years. The most likely scenario is a southern CSZ quake, with an 8 to 8.6 magnitude off the coast of southern Oregon and northern California according to the geologists. This is over 300 miles away from Portland.

Is the Cascadia Subduction Zone active?

Cascadia is seismically very quiet compared to other subduction zones – but it’s not completely inactive. Research indicates the fault ruptured in a magnitude 9.0 event in 1700. That’s roughly 30 times more powerful than the largest predicted San Andreas earthquake.

How often does the Cascadia fault rupture?

In the Cascadia subduction zone 13 megathrust events have been identified in the last 6000 years, an average one every 500 to 600 years.

Where is the Cascadia fault line?

The Cascadia Subduction Zone (CSZ) ‘megathrust’ fault is a 1,000km-long line that stretches from Northern Vancouver Island to Cape Mendocino California. It separates the Juan de Fuca , a 700-mile chunk in the Pacific Ocean, and North America plates.

Where is the Cascadia fault located?

The Cascadia Subduction Zone (CSZ) is a 1,000 km (620 mi) long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino in northern California. It separates the Juan de Fuca and North America plates.

What is the risk of earthquake in Oregon?

Earthquake Information for Salem, Oregon. Salem, OR has a moderate earthquake risk, with a total of 147 earthquakes since 1931. The USGS database shows that there is a 22.46\% chance of a major earthquake within 50km of Salem, OR within the next 50 years.