time. gregg: any way to know how large? >> well, not exactly. that's not an exact science yet. we actually do forecasting on our own web side called open hazards.com. what we're talking about is a triggering probability. another possibility, by the way, is that this mexicali earthquake occurred on the southern extension of the el señor fault, less active than the san andreas fault but still very active. gregg: and what does that mean? very quickly, i'm almost out of time. >> if that thing goes, then there's going to be major trouble in los angeles. there was a study done by the firm risk management solutions which actually, some years ago, which looked at the possibility of a magnitude 7 earthquake in one of the faults underlying central los angeles, and the estimate there was $200 billion worth of damage.