The latest exciting scientific news about the Cascadia Subduction Zone (first discovered in 2001, and confirmed in 2002) is the observation of silent, aseismic (no shaking) slip events on the CSZ. The silent slip events have occurred regularly, every 14 months, since at least 1998. The largest of these events involved a 60-kilometer-by-300-km area about 30 km or more beneath Vancouver Island and Puget Sound that slipped about 30 mm over a period of 12 days or so.

• September 2005 tremor
• 2004 Tremor episodes (2)
• Feb. - March 2003, Silent Earthquake produces low-amplitude seismic signals - From the PNSN
• The Silent Type: Pacific Northwest hit routinely by nonquakes - From Science News, April 2002
• West Coast Earthquakes Ongoing, Scientists Discover - From NSF , March, 2002
• PDF File - 2 pages Cascadia Subduction Zone Slip Event Detected - 2001
• Periodic slow earthquakes from the Cascadia Subduction Zone - From PANGA
• Evidence for periodic silent earthquakes along the Cascadia plate interface from the Pacific Northwest Geodetic Array - From PANGA - GSA Abstract, 2002