off the street
I must say I agree with you - It seems rather impossible to me that an impactor with dimensions capable of altering Earths axial tilt would not be
seen by anyone Even if it impacted at 90 degrees over the horizon you would think there would be some witnesses. I will say though it may still be a
possibilty because say at 30km / sec ( I think that is roughly the speed of thes bodies ) if it entered the atmosphere in perpendicularly to the
oceans surface - the time that it would have been visible would have been very short - in fact if my thinking is correct I will take 30 km / sec into
the depth of the atmosphere ( for arguments sake lets say 100 km ) that would leave a window for visual eyewitnesses of no more than 3.5 seconds .
not long at all - considering the time of day it seems possible to me at least that it was witnessed perhaps by very few. It is also possible that
those that may have seen it ( those outside near the coast ) are now likely part of the vast casualty pool.
Although the epicenter is very near some subjuncting tectonic plates , the actual center is KM from it. If I am to accept the Earthquake theory - I
will need to compare the exact epicenter coordinates to the 3 other 9.0 or greater quakes in reorded history and compare them in relation to the
actual fault lines. I have not yet done this - I will post my results.
I dont know about the satelitte imagery as actually being of any useful consequnce. I doubt that there is a global conspiracy to keep the truth
supressed from the public, but then again I just can't rule out the possibility entirely.
Probability and possibilty - I an sure we could debate the difference here for hours. The probablility in my mind is of no import. The fact is that
it ios a certainty that Earth will indeed be struck by these celestial bodies, the only factor worth debate is when, not if. Why not now? There is
statisically no certainty that we are immune from immediate impact. I started some other threads stating that we are indeed overdue for a major
impact , taking into account known impact dates throughtout Earths history and charted against great extinctions in the Biota. There is no argumnet
in the scientific world that such mass extinctions occured and indeed current thought i s that asteroidal / cometary impacts may indeed be a mjor
sacue. This is really here nor there as I am sure you agree with me on these points.
Back to Sumatra
heres some math
Let's estimate dimensions of asteroid. It had mass ma, initial velocity va and kinetic energy
E=ma va2/2 (6)
When it fell on Earth, it partly lose its mass due to partial burning in atmosphere, however by gravitational field of Earth it gained additional
Dv = (2gR)1/2 ~ 10 000 m/s
where g=9.8 m/s2, and R is radius of Earth, R=6366 km. Therefore when it fell on Earth, it had energy
Ea = (ma - Dm) (va + Dv)2 / 2
it was of order of magnitude about 1025 J (#2). Since speed of asteroid is ~30 kilometers per second, then
va + Dv ~ 40 000 m/s
Therefore, according to (5), its mass was of order
ma - Dm = 2 E / (va + Dv)2 ~ 1016 kg
Since density r2 of asteroids is of order 2-3 tons per m3, then its radius r at collision with Earth was about
r ~ ((ma - Dm)/r2)1/3 ~ 15 000 m
good luck with that - lol
ON THE POSSIBILITY OF VERY RAPID SHIFTS OF THE POLES
The Sumatra event is a huge tragedy regardless of cause. My prayers and thoughts are with the dead and the suffering