Hi Lowell,

Thanks for the information. It's very much appreciated. Now this brings on a question. Did the subduction zone earthquake in WA present pressure that far inland which can be attributed to today's earthquake?

We have to remember the WA quake was felt a very long distance from the epicenter. Buildings in downtown San Francisco were swaying, yet those on the ground couldn't feel it. Though it was recorded throughout the entire bay area on the regional seismic networks.

Is this related to the topic of far-field triggering mechanisms?

Petra