Thanks baker

A couple of observations. The Plate boundary has a break south of Sultan lake. It is the only break I see on the US plate. The red dot is knew today, not there yesterday and it’s meaning is not listed, ipad’ing. Sultan lake drains to the north and the elevation is -70m! A plate boundary 200 feet below sea level. Dutch has covered this area well. Fracking on old lava fields…

Their are two major cities on the plate, San Bernardino and San Francisco.

https://www.volcanoesandearthquakes.com/