'Big one' coming? Earthquakes off the West Coast could eventually trigger a global event

Last month, one study detailed that there is a 15- to 20-mile-long stretch of the San Andreas fault ‒ called the Durmid ladder structure ‒ that could result in an earthquake with a magnitude of 7 or greater.
"This newly identified Durmid ladder structure is a voluminous, right-reverse fault zone that broadens across Durmid Hill around rotating domains of regularly spaced, left- and right-lateral cross faults," a research article on the study reads.
The research put the odds at 75 percent that it would occur in both northern and southern California sometime over the next 30 years.
For approximately 330 years, the plate has continuously been pushed down, an activity that will eventually lead it to be pushed under the North America plate, causing the region to sink six feet on the minimum and may result in one of the largest earthquakes in human history.
If the entire 650-mile long Cascadia Subduction Zone (which includes the Juan de Fuca plate) were to experience a full rupture, it could not only trigger a 9.0 earthquake, but a tsunami as well.