[capitan_refugio]

True, the farther away you are from the hypocenter (or epicenter, if you prefer), the longer the time between the first p-wave arrivals and the first s-wave arrivals. The problem is that the p-wave (essentially a compressional sound wave) dies out as a function of distance from the origin.

[Floratina]

What is the attenuation rate for the P-wave (I can't think of a better way to word it)? I mean, I felt the P for Landers, a hundred miles or so away. Gave me plenty of warning, too.