Dr Kircher said that an important finding of the study was that vulnerable buildings - un-reinforced masonry, older reinforced concrete and "soft-storey" - made up less than 5% of all buildings in the region but would kill more than half the people.

BBC: NEWS | Science/Nature | San Francisco faces big shaker

So, while there has yet to be any concrete evidence that the economy is actually losing steam right now, with lots of people talking about another soft patch, we will want to pay particularly close attention to the upcoming data such as the ISM reports, the jobs numbers, and the commentary from corporations when they report earnings.

FORBES: Some Investors Concerned We Could Be Entering Another Soft Patch