I'm no geologist or seismologist or anything like that, but here's my go at it. Let's see if I even get close:

I predict that before the end of the month, there will be an earthquake along the California Coast of at least magnitude 8.

Well, one can at least hope...LOL
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)