So if it's not for causing the most chaos or destroying the most of the city... maybe it's some sort of exercise. We've got a few almighty overseers who might be interested in seeing how we deal with catastrophes.

On a less cynical note... we've got more than a few enemies with uncertain motivations, too.

I feel like the six months bit is probably a coincidence. There's no way Scorpio and Taurus will be the only ones targeted all the time. ....I don't think.