about in america these case called the cascadia fault which runs unsea 1300 miles north from north of vancouver island down the west coast of canada to washington and oregon and northern california terminating in mendocino. if that were to rupture, that unlike the san andreas would cause tsunami. >> sean: you mentioned new zealand, japan. it has been a long time since we've had with quakes along these faults you are talking about. again, i'm not an expert, please forgive my ignorance. could they trigger the third leg of that? >> trigger is the word. the word that i used in the news week article. it has to be said, some geologists say there's no evidence of triggering. it has to be said. i don't want to get too technical. scientists are beginning to notice that events do trigger other events. when there are quakes in