Earthquakes

Cascading subduction

Currently, scientists are predicting that there is about a 37% chance that a megathrust earthquake of 7.1+ magnitude in this fault zone will occur in the next 50 years. This event will be felt throughout the Pacific Northwest.

“Cascadia can make an earthquake almost 30 times more energetic than the San Andreas to start with, and then it generates a tsunami at the same time, which the side-by-side motion of the San Andreas can't do,”

Over the last 10,000 years, earthquakes around magnitude 9 have occurred along the length of the Cascadia Subduction Zone 19 times — about every 526 years. The southern section of the CSZ has seen 19 additional quakes of 8 or higher. Here, very close to home, the average recurrence is every 234 years.

The last time it occurred was on January 26, 1700 — the Cascadia Megathrust Earthquake, which resulted in an earthquake of approximately 9.0 magnitude lasting for 5 minutes.

That was 323 years, putting us in the area period of when the next one will occur.

Subduction quake Major cities affected by a disturbance in this subduction zone include Vancouver and Victoria, British Columbia; Seattle, Washington; and Portland, Oregon.

The waves could be 30-40 feet (9-12 m) in height when they hit the coast but some models suggest they could reach 100 feet (30 m), and in many parts of the coast they would flood up to 10 miles (16 km) inland.

An earthquake on the Cascadia subduction zone, a 1000-km- (~600-mile-) long fault zone that sits off the Pacific Northwest coast, can create a Cascadia tsunami that will reach the Oregon coast within 15 to 20 minutes.

The shaking will be felt for hundreds of miles - from the coast all the way inland to Boise, Idaho, even to the southeast toward Sacramento in California.

Provocative analysis of sea-floor cores suggests that quakes on the Cascadia fault off California can trigger quakes on the San Andreas.

While the San Andreas fault gets much of the attention, it's the Hayward fault that quake experts consider the most dangerous fault in America.

Although, there are faults like the New Madrid fault, the Ramapo Fault forms the boundary between the Newark Basin and the Highlands, running from Haverstraw, New York to near Schaefferstown, Pennsylvania, Dobbs Ferry Fault, located in suburban Westchester; and the Ramapo Fault, running from eastern Pennsylvania to the mid-Hudson Valley and many other which ca produce devastating effects.

Alongside devastating loss of live (number of deaths could exceed 10,000, more than 30,000), natural disasters, such as this, can inflict serious damage on economies(70 billion). They destroy equipment, buildings and infrastructure, and disrupt production. But the precise extent to which these events affect economic output in the long term will very. Ports of entry, loss of fuel pipelines may create a cascading effects. Recovery will depend on the state of the nation.

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