I'm only doing this because everybody is freaked out in HK. Many years ago, when all the good managers fled the old company, there was the chance I could do a seismic study for HK. I was ecstatic, and started looking up all the basics. It fell through and that's why I now have a pension. Still, I found that HK is on a solid piece of rock, and most of the buildings have solid foundations. But no matter how much rock it is still subject to at least an M6 at the 1 in 500, and I never could look for areas of swamp. I'm sure they are there.
Update: Thinking more on this, you realize that HK is the most laissez-faire gov't in the world, and they don't give a hoot about earthquake planning. Some was being done by the universities. Basically, dear HK-ers, if you freaked out about this earthquake, you are on swamp, and as good as Christchurch or Toronto.