If on a picnic table, assuming the picnic table is fastened to the earth and a jolt is big enough for an object to fly off occurs. What this means is the inertia of the object was holding it in place and the picnic table experienced the greater G-force as compared to the object. Now if the object falls 500 ft and hits the ground then we have satisfied the Zeta criteria. But, lets assume it doesnt. It rolls or slides until it hit something that stops it. Now, for the Zeta 500 ft drop equivalent force to take effect the relative motion between the moving object and what stops it must be going 122 miles/hr.
Now, as worst case imagine the bouncing back and forth between two walls fastened securely to the earth in such an optimum frequency that the opposing wall is moving fast toward the object as the object is fast approaching the wall. This would be as viewed from a theoretical remote unmoving view point. The bottom line is to satisfy the Zetas 500 ft drop criteria the relative motion of the object to the wall must be going 122 miles/hr. A 500 ft drop will impart a given amount of energy of motion in an object that when it is stopped must be dissipated. The high school formulas of Physics as given in the first report give the resulting G-force in relation to stopping distance.
If our electronics must survive this then the, housing and our bodies must survive the same jolt. Do you know of any human bodies that will survive traveling 122 miles/hr and hitting an object? The bottom line: You have me confused by saying essentially it not going to be as bad as what I am saying. Yet I think I am saying what is consistent to what the Zetas are saying which is something else, much stronger. I believe we can build to survive this but before we start I just want to be absolutely clear that 500 ft drop is the correct criteria. Next we need to know whether this applies to both free to move objects and fixed to the earth objects or only one and not the other. If it applies to free to move objects only then we need to know what the criteria would be when fix to bed rock so as to move with the earths plate. This is so a housing specification can be built. We could also ask whether its better to build a structure that is able to slide around or fasten to bead rock or something else.
Offered by Mike.
In fact, this dashing back and forth is what brings buildings down in cities during earthquakes. The explanation is that buildings of differing heights move back and forth, sway, during an earthquake, at different frequencies. As long as all the building on the block are the same heights, no problem, or so I'm to understanding by what I have read. If a tall building and short building are side by side, the short one has a faster sway than the taller, and is moving to the left when the tall is moving to the right, and the short strikes the tall in the middle, fracturing it. Down comes tall, crashing and smashing short, etc.
Well, this is presuming that humans or electronics are not lying flat, in an area where they cannot move far as the walls (hopefully padded) are close at hand, a few inches perhaps. Yes, humans survive moving 122/hr and stopping if the air bag prevents them going into the dash hard. They are moving as fast as the car (substitute earth plate) and when it stops, if they haven't far to move and are padded, they and the electronics should be OK!
Offered by Nancy.