The Canary Island threat is a large ocean away from NYC, but there are those who think it could devastate our eastern seaboard.
There are those who believe in zombies too.
The problem with these kind of stories is that the "experts" don't really know much more about when these kind of events might happen or how severe they might be than the average person does.
Recent geological discoveries such as Susan cites are hardly equivalent to belief in zombies.
The plate tectonic theory didn't come together until the 1960s. Yellowstone was not understood to be an active, ever-shifting caldera until the 1970s. California's San Andreas fault is still not entirely understood or predictable with any precision -- yet California building codes are revised as ever-greater potential for enormous ground motion due to that fault and others is discovered.
It was not until the 1990s that the Pacific Northwest was found to be vulnerable to subduction plate earthquakes 9.0 or greater. That discovery came when someone pieced together Puget Sound sediment, 300-year old, dated Japanese accounts of a tsunami and Indian legends that had been passed down through generations.
Europe wasn't concerned about Iceland's volcanoes until last week.
The Canary Island sequence of events and other landslide-generated tsunamis are similarly recent discoveries. Most geologic history far, far precedes recorded history. That these events occur in a geologic time-frame that does not make precise predictions possible or the events probable in our relatively puny individual lifespans is no reason to belittle their significant threat. We know for certain that cataclysmic events are going to occur in the future. One may occur next month, next year or 10,000 years from now. Exactly when, we don't know. There may never be an i-Phone app for that.
Seems the more we know, the more we know we don't know much relative to all that there is to know. What's the verdict on coffee this week? Good or bad for us?
As to the original post in this thread -- very interesting article, thanks for the link.