Luke's link takes one to a forecast that is significantly different than the one posted here. From that link, though, we can deduce that the forecast is based on CST. Therefore, it begins at 2200 25 Nov. PST, and expires at 2200 27 Nov. PST. The linked forecast, however, is for four days, not two . . . And, rather than "within 75 miles radius of San Francisco," (which we could take to be the City Center), it specifies a 3.24-degree range of latitudes, with no longitude specified. And, I suppose, the 75-mile "radius" could then be applied to the outer edges of the infinitely wide (W. to E.) rectangle thus formed . . . And, again, we have a preposterously narrow range of magnitudes specified, and have to take the lower one as the lower bound of the prediction, and leave the upper end open - as is conventionally done. I would guess that, over a four-day span, there is a pretty good likelihood that a quake which could, by some standards, be considered a "hit" will occur. Meaning that said hit would be rather a yawner.

Michael F. Williams
Arroyo Grande, CA USA