6.9 Quake off northern California coast

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Over 20 aftershocks so far, strongest one was almost a 5

No reports of injuries or damage on the news. Hopefully it'll calm down, but has the people there on edge because back in the early 90's, two strong quakes hit and levelled one town and severelly damged a few others.
 
I hope all will be well, but if memory of the 90's/000's Turkish quakes and recent tectonic theory has highlighted, since this is near the joint of 3 plates, then the littler plate is either releasing/equalising pressure or being pressurised; lots of small/micro quakes could suggest equalising, though those still influence the other 2 plate interactions.

Hopefully any further quakes will not spread further up the fault along landwards San Andreas line or Southwards across the Sea of Cortez. It's a question now which way, how and when the future quakes develop - the thinner tip of a blade will resonate more than the lower part of the blade will...
 
Last edited:
mikewint said:
Been nothing on the news around here so far. Is a tsunami a posibility?
Click to expand...
Probably not on the news out there Mike, because we have quakes all the time

This one was fortunately centered off the coast so the land damage was minimal. They were watching for possible tsunamis, but the underwater quakes in this particular region rarely initiate a tsunami, so no worries.

Just for a point of interest here, the famous "San Andreas" faultline that bisects California, heads off shore at San Francisco and runs due north along the coast to the vicinity of Fortuna and Eureka, then turning abruptly west for and heading about 140 miles before heading towards Alaska. At the point where the San Andreas starts it's run offshore at Fortuna, is the start of another large offshore faultline that runs due north along California, Oregon and Washington and it's at this junction is where the Quake and aftershocks were centered.

Might mention that this offshore faultline that branches off the San Adreas faultline is the base of what is called the Cascadia subduction zone and it's the one that devestated Japan in the 1700's with one of the largest tsunamis ever recorded...

But for now, it sleeps
 
Right Mike, just a few things knocked off shelves, scores of rattled nerves and the continuing aftershocks.

Fortunately, the ocean region where this quake is centered, doesn't generate tsunamis due to it's geographic layout.
 
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