Text 12852, 60 rader
Skriven 2007-03-10 00:00:02 av hap newsom
     Kommentar till en text av Glen Jamieson
Ärende: RE: DIVINE RETRIBUTION 70309
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Hullo Glen !
-> 
->  HN> I say the  driveway was sand...well so was the yard and the road as
->  HN> well....Why the  large area of impact rather than a typical fulgurite I
->  HN> can't explain.
-> 
->  ML> The layer of sand must have been thin, separated from the rest
->  ML> of the sand or clay by some insulator - perhaps air?
-> 
->  ML> It was very
->  HN> thin perhaps only 1mm thick, and too brittle and thin to even bear
->  HN> it's own  weight.
-> 
-> My theory is that the top layer of sand was damp, and therefore
-> conductive, while dry, insulating sand was beneath it.  Do recall
-> whether there had been dry weather, followed by a dew or light rain
-> immediately prior to the lightning strike?
-> 
A rather heavy rain as a matter of fact. It happened during a summer 
rainstorm, which can be quite violent in the south east during the summer.

-> Yesterday you came to mind, as result of a BBC TV program on the
-> forthcoming level 9 Richter earthquake and megatsunami which will hit
-> your neck of the woods.  The last one was in 1700, and the one before
-> in about 1400.  The slippage along the Cascadia fault line is expected
-> to take 5 minutes to travel the 500 km from one end to the other.  In
-> Seattle you will first get a vertical movement, followed later by a
-> one metre lateral shift, then a series of earth waves come, and
-> persist for some 5 minutes.  Older, masonry buildings will
-> disintegrate fairly quickly, but it is not known how well the
-> steel-framed sky-scrapers will survive repeated oscillations of 3 or 4
-> metres amplitude at the top.
-> 
That is one Big Gollywhomping earth wiggle you are talking about Glen! I've 
been through several 6+ and they are pretty impressive...and none have 
lasted longer than 2 minutes most have been shorter by a large margin...a 
five minute trembler would do an incredible amount of damage! 


-> The tsunami will hit the coast a half hour after the earthquake,
-> although Seattle and Vancouver will be shielded from that, being far
-> enough inland and behind Vancouver Island, which will be wiped clean.
-> 
Any wave large enough to sweep over the mountains on Vancouver Island 
would still pack a fair punch even down the length of Puget Sound! We do 
have quite a bit of rise from sea level very close to the shoreline but still I

would predict a HUGE amount of destruction. 

-> I was wondering, do you have practise runs of survival procedures for
-> residents, in particular for students in older school buildings?
-> 
Actually yes. There are Tsunami evacuation routes leading away from the 
coast, and a warning system to let people know it's coming. Around here we 
have a lahar warning system as we are in much more imminent danger from 
Mt Rainier popping off than a tsunami.
Chat with you soon
hap 
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