Well, that's cheery: According to the San Jose Mercury News, we're living over a "tectonic time bomb." The East Bay's Hayward Fault is the Yahoo of earthquake generators, always playing second fiddle to our seismic Google, the better-known San Andreas. But, like Yahoo, it still sells a lot of online ads — I mean, packs a wallop. On average, the Hayward Fault shakes its groove thing once every 140 years, and the last big one came in 1868. Ask yourself if your business plan has been seismically retrofitted — because a 7.3-magnitude earthquake is sure to pop all but the strongest of bubbles. (Photo by UC-Berkeley)

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