Skip to comments.Slow Seismic Slip Event Underway in Pacific Northwest
Posted on 09/14/2005 3:20:11 PM PDT by Esther Ruth
Slow Seismic Slip Event Underway in Pacific Northwest By Robert Roy Britt LiveScience Managing Editor posted: 13 September 2005 10:03 pm ET
Updated 2:35 p.m. ET Sept. 14
An important seismic event imperceptible to humans has begun in the Pacific Northwest as predicted, according to the government agency Geological Survey of Canada.
The chance of a major earthquake is 30 times higher now for a roughly two-week period, but the odds are still remote, scientists say.
The event is called episodic tremor and slip (ETS). It involves a slow movement of the Juan de Fuca and North America tectonic plates along the Cascadia margin of southern British Columbia. Faults associated with the plates have been the sites of major earthquakes -- akin to the colossal tsumani-causing quake last December in Indonesia -- every 500 years or so, the geologic record shows. The last such temblor in the area struck on Jan. 26 in the year 1700.
The movement is slower than a traditional earthquake but more rapid than the normal creep associated with the fault. It runs in the reverse direction of the normal creep.
(Excerpt) Read more at livescience.com ...
Oh come on, haven't you ever watched the "Tremors" movies on the Sci Fi channel?
Sounds like a dance: "Seismic slip, let your backbone flip" ...
"An important seismic event imperceptible to humans..."
Just keep an eye on your local rodents. When you see rats scrambling for safety, you can be assured something big is coming your way. (And I don't mean Fat Teddy!)
Don't ask me how I know this, as my reasoning skills are imperceptible to other humans. ;)
The fault could move backwards if you think of it as chunks along each side of the fault. There is never a solid piece on either side of a fault line. A fault line is never straight, but is a series of jagged sections, 5 miles long, 100 miles long which do the actual slipping when an earthqauke happens.
One side of the fault (the Pacific plate) is moving North, the other (the North American plale) is more-or-less stationary. The stationary continental side, or more accurately a section of it, can be pushed so far north by being locked up against the Pacific side, that it eventually slips backward, either slowly like in this case, or all at once like in a big earthquake.
The pressure can build so much that if both sides are still locked enough together, both sides of the fault line move backwards.
But to me this means that the pressure is built up so much that a big quake can happen (especially considering the length of the sections moving.)
Obviously Bush's fault.
He should apologize and take responsibility immediately.
Oh Great! I live 30mi East of Seattle, and I saw two rats cross the road today heading NE, I also saw the same thing last week.
I had slow creep once. Went to the pharmacy and bought some meds and now my creep is back to normal speed.
I thought WA was polluted with demoncrats.
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