This series of entries speaks of a mega quake, and subsequent super tsunami, that will occur on the west coast of the USA that will destroy large parts of California, Oregon, Washington State, and other areas along the western coastline.  Some believe this may be caused by an unzipping of the Cascadia faultline which presently is the only known fault with sufficient enough potential energy to create such a quake.  There has also been extensive discussion that, should this earthquake occur, it will create a subsequent tsunami tens, even hundreds of feet tall that would sweep inland for a distance of between 60 and 100 miles.  Any city situated along the west coast, including Los Angeles and San Francisco, would be completely destroyed, and/or complete submerged under water.  There is also the potential that this earthquake could cause the continental shelf in that area to sink as much as 40 feet or more, upwards to as much as 200 feet, causing some areas to figuratively "fall into the sea", never to be seen or heard from again.