Magnitude 4.2 earthquake hits near Belfair
There’s little doubt in local seismologists’ minds that the numerous tremors recorded in the Puget Sound region over the past several days are related to a phenomenon that some say increases the risk of a major earthquake.
Earthquake Warning System passes test in Belfair earthquake
Just how much the event increases the risk of a mega-quake is up for debate, but one thing is for sure, the tremors are spreading.
“Just over a week with strong tremor[s] every day and spreading mostly north,” the Pacific Northwest Seismic Network wrote on its blog.
About every 14 months, the Cascadia Subduction Zone that stretches from Northern Vancouver Island to Cape Mendocino, Calif., experiences an episodic tremor and slip, or “slow slip” for short. During these events, the Juan de Fuca Plate moves westward and adds stress to the Cascadia Subduction Zone some. Some scientists believe the 620-mile subduction zone is at slightly higher risk for a major earthquake.
The last slow slip event was recorded around the end of December 2015 through January 2016.
http://www.kiro7.com/news/local/strong-tremors-recorded-for-the-past-week-under-hood-canal/498251255
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