The risks of “the Big One,” (a catastrophic major earthquake disaster in the southern California area), as
well as newly recognized increased earthquake risks in other regions of North America have been considered by many. However, there is yet another potentially catastrophic earthquake zone that is less well known and deserves serious consideration as well, namely the
Cascadia Fault earthquake threat in the U.S. northwest region. It is what Vicky Gan, writing in City Lab, noted that the New Yorker feature
article on the risk called “
the Really Big One.”
