[Poohbah]

What's the uncertainty zone look like, and what's their central datum?

[John H K]

It's a pretty big area. At least they're forecasting in a legitimate way giving specified date ranges, magnitudes, and locations, they're not kooks as 99.9999999% of so-called quake forecasters are, who spend more time on spin than forecasting.

However, all of their forecasts have been of a nature that they've had a pretty good chance of being correct by dumb luck, up to this point. That's even true of this one.