ive been watching the news and i saw the pictures..
from how i understand the situation there it seems they suffer from poor building construction..

tanawa nino ang mga buildings nga destroyed, it seems murag daghan building wala reinforcement bars. and kadto naa, kulang ra kaau for their sizes.. clearly the buildings were not designed for such seismic loadings..
7.0 earthquake isnt that strong actually, its very common around the pacific ring of fire. we cant blame the haitians for their poor design. such area isnt an earthquake prone zone. last earthquake was more than 200 years ago..
this event was similar to that of japans' in the past.. where the culprit was poor engineering.. im confident that if these should happen in our country, damage would only be minimal since our structures are design for large seismic loadings..