[CyberAnt]

Do you have a reference picture which shows that plate and where it runs along the coast ..??

I just use the USGS world picture because the pacific rim facinates me (being part of it).

http://earthquake.usgs.gov/recenteqsww/

[Strategerist]

Actually the margin between the Pacific and North American plates extends from just offshore Calfornia all the way to Utah; the San Andreas contains most of the motion, but not all of it; it's shared among a variety of faults and actually the entire west is sort of being stretched out and moving NW, less and less the farther east you get.

And pretty much all geologists are in agreement that the San Andreas is gradually becoming less and less of the primary boundary and that it will shift to run up east of the Sierra Nevada into the State of Nevada.

[Heatseeker]

Do you have a reference picture which shows that plate and where it runs along the coast ..??

I think Strategerist answered your question awhile back (#273) but take a look here which also specifies the portion of the plate I'm interested in, the Gorda microplate.

BTW Strategerist, I am also in Maryland. What's that line about the pleasures of viewing revolution from a terrace? ;)