Homeaftershock Cascadia subduction zone runs some 700 miles byThe Great Pacific Northwest Earthquake -September 12, 2015 FEMA is planning for an earthquake that would devastate the Pacific Northwest. Read more FULL ARTICLE Tags aftershock aftershocks cascadia subduction zone earthquake preparedness earthquake safety guide earthquakes Pacific Northwest Seismic Network seattle earthquake Facebook Twitter Share:Cascadia subduction zone runs some 700 miles Facebook Twitter WhatsApp Pinterest LinkedIn Reddit Tumblr Telegram Email