Happy to be alive !!

continuing from where I left yesterday.

Am alive therefore I write.
Headed straight to the beach and found it deserted.
Found true love.
A couple was busy romancing,ignoring all tsunami warnings.
May be that is why they say,
"Ignorance is bliss"
With in minutes a convoy of policemen drove everyone away from beach.
Went to my place to learn that the tsunami-warning had been with-drawn.

Why wasn't there a Tsunami?
* Though the quake occurred close to the epicenter of the 2004 quake,
it occurred @ a depth of 30 km under ocean floor,
way deeper than the 2004 quake,which occurred @ a depth of 10 km.
As a rule,deep quakes dont trigger tsunami but shallow quakes do.
When a quake occurs deep under ocean-floor the fracture does not travel
all the way to ocean-floor. So,no crack appear on ocean floor and no water
is displaced. When no water is displaced,there will be no tsunami.
* The fault-line length of yesterday's quake was 200 - 250 Km.
The 2004 quake's fault-line measured 1200 Km.
Shorter the fault-line,lesser the water that is displaced.
Hence lesser the probability of Tsunami.
* Waves always travel in a direction perpendicular to the direction of the
quake fault-line. The fault-line of yesterday's quake was oriented in
north-west and south-east direction. Even if waves were triggered,those
would have traveled towards pacific ocean and not towards the continents.

Now,I know why there wasn't Tsunami.
Now,I know why I'm alive.
Or do I really know why?