Well, putting everything in the Australian outback doesn't help that much, because there are good reasons why thousands of tech workers can't work there. This is essentially an argument against having any population centers in earthquake zones.
Which is an interesting point in and of itself.
http://www.nytimes.com/interactive/2011/05/01/weekinreview/0...
In the list of worst predictable natural disasters in the Continental US, it rates one above the expected earthquakes to the south, the result of two plates mostly sliding past each other: https://en.wikipedia.org/wiki/San_Andreas_fault
Worse, in part because we aren't at all prepared for it (aside from I hope more serious buildings) would be a return of major earthquakes in mid-West: https://en.wikipedia.org/wiki/New_Madrid_Seismic_Zone (something I pay attention to since that's on the other side of Missouri from me).
I forget one of them, and the worst, which few in the US would survive, and where being in Australia might not be a bad idea at all, would be a return of the Yellowstone Supervolcano: https://en.wikipedia.org/wiki/Yellowstone_Caldera