Slow motion earthquake from Vancouver Island to southern Washington the longest yet recorded

Between August and October 2012, the Pacific Northwest experienced the longest slow slip event ever recorded. It started on Vancouver Island in Canada (red dots), and over several weeks migrated south into the Olympic Mountains and deeper into Washington state (blue dots). Credit: Source: A. Wech

Slow motion earthquakes, called “slow slips”, are a phenomenon that scientists are just coming to understand. And one of the longest of these events, which some say portend more high-intensity temblors, happened last fall in across the PNW. ESS’ John Vidale is quoted; read the full article by Science News here.