[ RadSafe ] Coral reefs, Global Warming, Earthquakes, etc.

[JPreisig at aol.com]

Dear Radsafe:

        This is from:   jpreisig at aol.com   .

         Hope all is well in radsafe-land.

         Saw a news-item on Television last night suggesting that corals and
coral reefs are being killed off by warmer than usual water generated by
global warming.  I suggest these researchers should look a few hundred
kilometers north (in the Northern Hemisphere) of their present research 
location and believe they will find new coral reefs growing, where there 
colder
water is now a bit warm.

       In a separate item, the 6.8 earthquake in Japan near the reactor was
not terribly large, but there was loss of life and local property damage.
Magnitude 7.5 earthquakes do occur in Japan.  A book showing how these 
magnitudes are computed (for the layman) was written by Bruce Bolt.
Earthquakes do occur where faults have not been mapped before
(some are called blind thrust faults).  I'm sure the Japanese have 
considerable
GPS (Global Positioning System) and VLBI (Very Long Baseline Interferometry)
data available to try and understand what is dynamically happening with all
their faults and earthquakes.

     A 6.8 earthquake is not very large in global terms anymore.  The recent
Indonesian earthquakes had magnitudes in the range 8.7 to 9.3.
The Chilean and Alaskan earthquakes in the early 1960's (1960 and 1964)
had magnitudes in the vicinity of 8.5.  Bolt's book has the title Earthquakes.

     For Health Physicists requiring a graduate level text in seismology,
look for the Seismology book by Aki and Richards.  The book has plenty
of higher math for everyone and even has information on Fourier 
Deconvolution, I think.

     That's all for now.  Have a great day!!!!

     Regards,     Joseph R. (Joe) Preisig, Ph.D.



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