Study by DNR geophysicist suggests hazardous Seattle Fault Zone developed as the edge of the continent split more than 50 million years ago  

The Seattle fault zone is a network of shallow faults slicing through the lowlands of Puget Sound, threatening to create damaging earthquakes for the more than four million people who live there. A new origin story, proposed by Washington State Department of Natural Resources geophysicist Megan Anderson and others in a new study, could explain the fault system’s earliest...