Forecasting a quake in Christchurch is like picking the Melbourne Cup will be won by a horse

Christchurch rocks, as they say.

At least one tremor every day, it seems. Must have a chat with Gerry Brownlee to check if this is correct, although Gerry has become somewhat prone to keeping some bits of information strictly confidential these days.

Anyway, a shake every day or so makes it a bit of a doddle to predict on which day the city will be shaken.