Posted on 04/14/2008 10:54:28 AM PDT by NormsRevenge
You owe me a new screen!
Thanks for the info.
When the Northridge quake happened our pool whipped back to one end - and curled up and flew at the house coming into the room overlooking the pool and deck.
We didn’t live in Northridge but a few miles up the road...
That is as close as I want to get ever. Stupid me I had stumbled out of bed and ran to the back room to see all the hanging plants jumping up and down and I caught the water full face!
6.5 is no big deal.
A 6.5 under any US urban area is a disaster of immense proportions; Northridge (6.7) was deep, and much of its energy went in to fairly unpopulated areas; it also did 40 billion dollars worth of damage and would have killed hundreds if it wasn't in the wee hours of the morning.
A volcanic explosion deep underground which causess a vertical upheavel and a wave action radiating outward in all directions is the cause.
The above is abjectly false. What kook site did you get that from?
There is no horizontal movement in an earthquake.
There's plenty of vertical AND horizontal movements in earthquakes, measured by strong motion sensors.
The major damage is done to buildings on soft ground where the wave is unhindered rollong through the building lifting and droping sections in succession. On granit or hard rock formations the wave is dampened and damage is minor.
Well, the above is actually true, remarkably. You batted about 1-for-8 though.
There’s still a huge amount of older masonry buildings in both Southern and Northern California.
The real problem is that both Loma Prieta (distance from urban area) and Northridge (most energy directed away from LA) perhaps gave a false impression of how bad things will be.
Also, there were hundreds of buildings that LOOKED ok in Northridge that were later condemned due to structural damage - not every building is going to spectacularly collapse.
As the energy released by the rapid dislocation of mass travels through the adjacent strata, how that adjacent strata reacts is key to damage of structures placed on its surface.
If the strata is loosely consolidated, and lubricated by ground water, the basin acts like a bowl full of jelly, refracting and reflecting energy over longer periods of time. Rigid structures sitting on the jelly are literally shaken to structural failure. Accelerations are not as great as at the point of orgin, but the reciprocating nature of the motion destroys.
If the adjacent strata is hard rock, the energy transmitted is unmodified, except by distance. The structure sitting on the hard strata endures only a few sharp jolts without great motion displacements. A structure might be lifted sharply off it's foundation but the displacement is quick and short, limiting damage to cracks and small ruptures.
If everyone got right with Jesus, do you think he would call it off?
Oh goody, goody, goody. We live about 50 feet up and 300 yards back from the ocean on the northern California coast. This morning I heard a report that the “big” one was slated to hit 400 miles off the OREGON coast! Wish they’d get the stories straight, or maybe we’ll get real lucky and get it from both the south and the north.
Edgar Cayce predicted a huge megaquake for the EAST coast that would put CT, MA, RI and large portions of NY under the atlantic.
don’t feel alone;-) we’ll have to tie up the boat in Ohio.
We’ve heard it may snow here in New Hampshire next winter, too.
Yes.
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