The Big One Hits Japan
The Big One Hits Japan
(OP)
8.9 earthquake hits off the coast of Japan. A 13+ft Tsumnami moved inland.
http://www .reuters.c om/article /2011/03/1 1/japan-qu ake-usgs-i dUSN112042 9420110311
http://www
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RE: The Big One Hits Japan
RE: The Big One Hits Japan
RE: The Big One Hits Japan
At least it is the area with a good Tsunami warning system, but the further away you are from the epicenter, the results are diluted, but can be re-energized by local shore conditions.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: The Big One Hits Japan
Did you notice the sign swaying in one of the video clips?
Watching the sign which appears to be normal to the wave front looks like the quake has a very short peroid to add to the duration.
RE: The Big One Hits Japan
It was far stronger than the recent Northridge quake where I did engineering damage assessment and was able to see damaged buildings after the quake and then again a day later after the aftershocks. the aftershocks were the revealing
It is fortunate that Japan has good codes regarding seismic activity. I was in a lab that had shaken 3 or 4 story (full size material segments) for code and design purposes.
The problem is blending the results into meaningful standards for life safety codes and ultimate "last forever under any possible condition" standards.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: The Big One Hits Japan
What looked like a nuclear containment building, a cube-shaped structure of (I am assuming) reinforced conrete, had a huge wide crack along one side. No radioactive releases so far that I know of. Apparently every house has a natural gas shut-off valve that is activated by seismic activity above a certain threshold.
RE: The Big One Hits Japan
God I hope I misheard the information...
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: The Big One Hits Japan
The pressure in the reactor is up 1.5 times the normal pressure.
The radiation is ?100? times the normal level.
The exclusion zone has bee increased from 6 to 10 kilometers.
None of the cooling towers are operating.
RE: The Big One Hits Japan
Have read about 88000 unaccountably lost people even if officially casualties remain under 1000.
Pressure stable within the reactor at nuclear reactor in Fukushima, but rising in the containment structure, ability to control the temperature lost. 2nd Evacuation around.
http://www
Best wishes for those suffering these things.
RE: The Big One Hits Japan
The big shaking seemed to last at least a minute or two. There wasn't any serious damage to our building, a few computers falling over. I'm not sure about the factory, but I didn't hear of any injuries. I'm just glad the buildings around here are built sound, especially after seeing the pictures of NZ a few weeks ago.
This experience has really made me thankful for all you structural engineers. It's one thing to see it on tv, and another to be hiding under your desk. I'm off to work to see what's going on.
RE: The Big One Hits Japan
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RE: The Big One Hits Japan
It gives status of each nuclear plant.
http://www.nisa.meti.go.jp/english/index.html
RE: The Big One Hits Japan
Does anyone have any idea, exactly how high or how far the largest movement had reached, between each-one of these simultaneous earth-movements. This comments may sound like I'm joking, but it's an issue I'd like to dive into a bit more.
My sympathies to anyone who is apart of this disaster, or who has family which is in Japan or the surrounding areas.
RE: The Big One Hits Japan
From what seen it is clear the accumulation of fossile animals (congealed and not) of every kind in cracks all over the world at heights akin to that and more 11500 years ago was likely caused by some brutal washing like the one of this tsunami ... or worse.
I have read (I think in La Violette books) of true 300 to 800 meters tall seawalls running over China to dump the wash at the northern Siberian coast, where the submerged trunk fossils can still be found. Indian legends are quoted for akin fearsome water wall heights.
These waves are thought not to be caused by the vibratory ringing of some submarine earthquake, but for some inclination of the terrestrial axis, where water from the before bulging elipsoid is searching their new equilibrium in the wobbling movement; essentially upon the change of axis they found to be at a height over what was before firm land and so fall therein.
This kind of scenario is something nothing of the kind that our current technology can defend us for now. Nothing sort of giant ark vessels continuously available to overcome the humours of one turned dangerous planet is enough; plus, what such spaceships must stand till either the home planet is stable and livable again or travel to another one.
I once read that humankinds were always in progress just in the programmed instinct of trying to build the ark able to bring them to another planet before the conditions make it unlivable. It may prove to be true.
RE: The Big One Hits Japan