That is a hair-raising article. Thanks for posting.
We had thought about retiring out on Vancouver Island (in the distant future) because the climate is so much more friendly to geezers. A great many Canucks from the Prairies (the interior of the continent -- Alberta, Saskatchewan, Manitoba) have had the same idea.
Are the direct benefits worth the risk? Phew. Good question.
Edit: how the heck do you make that calculation? Thoughts?
Actuaries and statisticians can tell you with a good degree of certainty how many traffic accidents of varying severity will happen today, and how many people will fall down stairs, and how many will drown at the beach. If they couldn't, insurance companies would never know how much to charge for a policy. In other words, as pointed out by Laurence Gonzales in his book
Deep Survival, some disasters are 'normal.'
The probability of a quake here is 100% if you wait long enough. If we knew for a fact that it would happen in, say, ten years, we would spend many billions of dollars to prepare for it. The problem in weighing the risk and the amount of preparation arises with low probability (in the immediate future) events that have incredibly high consequences. It isn't a 'normal' disaster.
If I were planning on spending 20 - 30 years retired in an area with the potential for a very high consequence event, I personally would reconsider.