Re: [IRCA] Tsunamis, Chaos and Highway Advisory Radio in Oregon

["Thomas Giella" <flcyclone@xxxxxxxxxxxxxxx>]

I post this as a retired Meterologist, Physical Oceanographer and Space 
Plasma Physicist.

The global reaction to the tsunami that wreaked death and destruction in SE 
Asia on December 26, 2005, has been an over reaction! Forecasts have shifted 
from "asleep at the wheel" to repeated false warnings that will eventualy 
lull the populace into complacency.

To produce a tsunami from an undersea earthquake you need "vertical" 
movement along fault lines. Most undersea quakes involve horizontal movement 
and therefore do not produce tsunami's. Much like a storm surge with a 
tropical cyclone, you also need a lengthy and shallow continental shelf like 
exists west of Florida as an example, to magnify a tsunami in the vertical 
plane.

The occurence of a damaging tsunami along the the west coast of the U.S. is 
minimal and occurs on average 1.3 times every hundred years. From memory the 
last one to hit portions of the west coast was with the Alaska earthquake of 
1964. The big threat along the west coast as we all know is the earthquake.

Should we produce programming to be transmitted via  TIS and HAR stations to 
transmit tsunami warnings? As far as poor government response to natural 
disasters, it's tragically normal.

73 & GUD DX,
Thomas F. Giella, KN4LF
Plant City, FL, USA
27 58 33.676 N 82 09 51.674 W
kn4lf@xxxxxxxx

KN4LF Amateur & SWL Radio History: http://www.kn4lf.com/index.htm
KN4LF MF Radio Propagation Theory Notes: http://www.kn4lf.com/kn4lf8.htm





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