Department or Administrative Unit
Every 14 months the Pacific Northwest experiences slow slip on a fault that is the equivalent of about a magnitude 6.5 earthquake. While a typical earthquake of this magnitude happens in less than 10 seconds, the duration of these slip events is two to several weeks. The most recent event occurred from January 14 through February 1, 2007.
Creager, K.C., & Melbourne, T.I. (2007). Episodic Tremor and Slip in the Pacific Northwest. Earthscope onSite Newsletter, winter/spring 2007, 1-3.
Earthscope onSite Newsletter