i think this shows it well.
Posted on 02/26/2010 1:08:19 PM PST by bd476
Bammy must’ve found Bush’s earthquake machine in the Whitey House basement. Retaliation on Toy-yoda no doubt.
I was trying to figure out where Tokyo was relative to this...and looking for a map with both...
Bush’s fault. How did I miss that one? It was right over the plate.
Prayers up. With the number of earthquakes regularly occurring in this entire region and with all the safety precautions and earthquake preparations already in place, hopefully damages and injuries will be limited.
Thanks for the links, Tigen!
LOL - well, I must be honest and report that I did not come up with that. I read it on an earlier thread regarding the earthquake near Chicago that occurred recently.
i think this shows it well.
...and before that it was space shots....and befor that it was A-Bomb tests....and before that it..........
System is acting funny...
They are if you read Clive Cussler novels...
north
north
Ernest I just uploaded this little map of Japan I had onto tiny pic. I will look for a larger one.
Nasty, that.
Oh good, thanks Ernest. LOL, I didn't see your post when I uploaded the other one.
With three devices and a time differential and some triangulation you can figure out where it happened...
Disclaimer...I may be incorrect...but the Map at 16 is a hint.
Ryukyu Islands - I lived om Miyako Jima for a year. Great place, great memories.
The second type of deformation, dynamic motions, are essentially sound waves radiated from the earthquake as it ruptures. While most of the plate-tectonic energy driving fault ruptures is taken up by static deformation, up to 10% may dissipate immediately in the form of seismic waves.
The mechanical properties of the rocks that seismic waves travel through quickly organize the waves into two types. Compressional waves, also known as primary or P waves, travel fastest, at speeds between 1.5 and 8 kilometers per second in the Earth's crust. Shear waves, also known as secondary or S waves, travel more slowly, usually at 60% to 70% of the speed of P waves.
P waves shake the ground in the direction they are propagating, while S waves shake perpendicularly or transverse to the direction of propagation.
Although wave speeds vary by a factor of ten or more in the Earth, the ratio between the average speeds of a P wave and of its following S wave is quite constant. This fact enables seismologists to simply time the delay between the arrival of the P wave and the arrival of the S wave to get a quick and reasonably accurate estimate of the distance of the earthquake from the observation station. Just multiply the S-minus-P (S-P) time, in seconds, by the factor 8 km/s to get the approximate distance in kilometers.
The dynamic, transient seismic waves from any substantial earthquake will propagate all around and entirely through the Earth. Given a sensitive enough detector, it is possible to record the seismic waves from even minor events occurring anywhere in the world at any other location on the globe. Nuclear test-ban treaties in effect today rely on our ability to detect a nuclear explosion anywhere equivalent to an earthquake as small as Richter Magnitude 3.5.
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