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Galactic Explosions, Cosmic Dust Invasions, and Climatic Change

Posted on by Brendan Darrer

Abstract
GALACTIC EXPLOSIONS, COSMIC DUST INVASIONS,

AND CLIMATIC CHANGE
by
Paul A. LaViolette

The hypothesis (Galactic Explosion Hypothesis, GEH) is put forth that
about every 10,000 years or so the center of our Galaxy enters an explosive
phase during which it generates an outburst of cosmic rays with total
particle energies on the order of 10 57 ergs or more. These outbursts or
"superwaves," composed of highly relativistic electrons and positrons,
would travel radially outward through the Galaxy at very close to the speed
of light (~0.99999c) with only moderate attenuation by the interstellar
medium for the journey from the Galactic Center to the Sun). It is
suggested that upon impacting the solar vicinity, the resulting thousand fold
elevation in the ambient cosmic ray energy density would initiate a
sequence of events which could profoundly influence the Earth's climate.
For example, dust and gas vaporized from comets orbiting just outside of the
Solar System would become transported into the Solar System which in turn
would alter the radiation transmitting properties of the interplanetary
medium and of the Earth's stratosphere. Upon accretion by the Sun, this
nebular material would also alter the Sun's spectrum and could lead to the
initiation of intense solar flare activity. It is proposed that, in various
combinations, such effects could trigger the initiation and termination of ice
ages, cause geomagnetic reversals, and indirectly bring about mass animal
extinctions. It is proposed that the most recent major superwave passed
through the solar vicinity beginning about 14,200 years ago and lasted about
2000 to 3000 years with a major peak occurring about 12,450 years ago.
Astronomical and terrestrial evidence are presented to support the
Galactic Explosion Hypothesis. Also, the results of a critical Earth-based
test of the hypothesis are presented. In particular, it is reported that the
polar ice concentrations of iridium and nickel (both good indicators of
extraterrestrial material) rose by one to two orders of magnitude close to the
end of the Last Ice Age. These test results are consistent with the GEH
prediction that cosmic dust deposition rates were significantly higher during
the time when the 14,200 years BP superwave would have been passing
through the solar vicinity.

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