On Feb 6, 5:59 am, Bob Officer <
boboffic...@127.0.0.7> wrote:
> On Sat, 04 Feb 2012 08:21:17 -0700, in sci.geo.earthquakes, Felix
> I peak in from time to time.
>
> What you said, I agree with 100%
Be careful what you lie down with. It may not be what you get up with.
I got this from him in my e-mail:
Do you still live with your mommy?
Inbox
Felix Tilley fetilley@munged
05:12 (15 hours ago)
to me
Subject: Re: BC earthquake
From: Weatherlawyer <
weathe...@gmail.com>[go ahead, spam
me, see if I care.]
Newsgroups:
sci.geo.geology,bc.general,van.general,sci.geo.earthquakes
Date: Sun, 5 Feb 2012 04:51:56 -0800 (PST)
On Feb 5, 9:12 am, Skywise <
i...@oblivion.nothing.com> wrote:
> Paul in Houston TX <P...@Houston.com> wrote innews:jglbi4$g30$1@dont-
>
email.me:
>
> > Quakes happen due to compressive stress along a fault plane
> > being relieved suddenly.
> > If the stress gets relieved in small movements before it gets
> > to the 6.7 state, the 6.7 will never happen.
>
> Let's try this a different way...
>
> It's a gross oversimplification, but let's say the stress builds
> at a constant rate. Let's say it takes 100 years for the stress
> to build up such that it would cause a mag 6.7 quake.
>
> In order for a number of 5.7's to relieve that stress and prevent
> that 6.7 in 100 years, there would have to be 32 of those 5.7's in
> that 100 years - a 5.7 every 3 years or so.
>
> Now, since a 5.7 doesn't happen every three years, the stress is
> still building up. Eventually, that 6.7 will still happen.
>
> Of course, it _is_ much more complex than that. For one, that 5.7
> only relieved the stress on a small part of the fault. It did nothing
> to relieve it elsewhere. It's even entirely possible that it ADDED
> to the stress elsewhere. It may have brought other more stressed
> parts of the fault closer to breaking. It _may_ be a foreshock of
> things to come. Then again, it may not.
>
> Let's put in some more real numbers. Again, the Cascadia subduction
> zone could generate a magnitude 9 quake. The last one seems to have
> been back in 1700. Rounding off that's 300 years ago. Let's say it
> takes 500 years to build the stress for a magnitude 9 quake. To
> relieve that stress, you'd need 1000 mag 7 quakes, or one million
> magnitude 5 quakes. Since we're only 3/5th's into the cycle, there
> would have to have been 600 magnitude 7's or 600,000 magnitude 5's
> in order to keep up with the stress buildup. Have there been that
> many quakes of these sizes since 1700?
>
> Remember what I first said, each full point of magnitude represents
> a 32 fold increase in energy. 2 points is 1000x, 3 points = 32,000,
> 4 points = 1 million, 5 points is 32 million.... etc... It's a
> logarithmic scale.
>
> If this one little 5.7 quake relieved any stress on Cascadia, it
> only delayed the inevitable 9.0 by a few days, maybe a couple weeks
> at best.
Now lets explain how doubles and trebles show up on the North Atlantic
weather chart.
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Felix Tilley
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That's all it says.
Why go the bother?
Do I still live with my mommy?
Some people are beyond comprehension.
I know he suffered structural damage in the quake he can't put behind
him but ...really...