The Haitian tragedy has once again alerted me to the fact that it was the buildings rather than the natural movements of the earth that has caused this mayhem. I believe the fault line going through Haiti is one of those that builds up tension over decades or centuries and releases it energy all in one go, rather than let the friction slip frequently, thus catching the people unawares. Is there any low cost permanent or semi-permanent housing idea's that can be developed to resist this phenomena?