Tectonic processes active in the Cascadia subduction zone region include accretion, subduction, deep earthquakes, and active volcanism of the Cascades.
- What is Cascadia event?
- What will happen during Cascadia earthquake?
- What is Cascadia Where is it located and why is it a concern?
- What will happen when the big one hits?
- What happened in the Cascadia subduction zone in early 1700 What effect did this event have in Japan?
- Is the Cascadia subduction zone active?
- What cities will be affected by the Cascadia earthquake?
- Why does the Cascadia subduction zone pose a significant tsunami risk?
What is Cascadia event?
The 1700 Cascadia earthquake occurred along the Cascadia subduction zone on January 26, 1700 with an estimated moment magnitude of 8.7–9.2. The megathrust earthquake involved the Juan de Fuca Plate from mid-Vancouver Island, south along the Pacific Northwest coast as far as northern California.
What will happen during Cascadia earthquake?
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.
What is Cascadia Where is it located and why is it a concern?
Where is it located and why is it a concern? Cascadia is a vast and volatile fault line stretching from Vancouver to California. The pressure builds and could rupture in a huge M9 quake. It would create a tsunami similar to Japan.
What will happen when the big one hits?
Narrator: The quake could kill about 1,800 people and leave 50,000 or more with injuries. While people could die from falling debris and collapsed structures, the highest death toll would be from fires.
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.
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.
What cities will be affected by the Cascadia earthquake?
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).
Why does the Cascadia subduction zone pose a significant tsunami risk?
The CSZ has a history of producing large earthquakes and will produce 8.5M earthquakes or larger in the future. Aside from the ground shaking, liquefaction, and aftershocks that would result from an earthquake of this magnitude, coastal lands are threatened by the tsunami that may follow.