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So, in beginning to independently investigate the enormous CME thing. The simple route would be to create two columns of likelihood. One greater and one lesser. On the greater likelihood side there's the Younger Dryas event interpretation that goes something like: A CME hit one side of Earth melting ice (meltwater pulse) charring landscape (black mat layer), stripping atmosphere on that side. Pressure differential on opp side (EHem) causes an ultra-high speed wind in order to equalize pressure. The wind being responsible for massive boneyard/debris fields found across Siberia while the atmospheric pressure drop as air rushes to Western Hemisphere flash freezes parts of Eastern Hemisphere bringing about the well-known findings of woolly mammoths with fresh frozen "buttercups" in mouths and stomachs. twitter.com
And there's the "End-Permian extinction, which wiped out most of Earth's species, was instantaneous in geological time" phys.org "But the global ecologic collapse came with a sudden blow, and we cannot see its smoking gun in the sediments that record extinction," Ramezani says. "The key in this paper is the abruptness of the extinction. Any hypothesis that says the extinction was caused by gradual environmental change during the late Permian—all those slow processes, we can rule out. It looks like a sudden punch comes in, and we're still trying to figure out what it meant and what exactly caused it."
There's also Oppenheimer Ranch's data interpretation, Robert Shoch's data interpretation and Doug Vogt's interpretation. _____________________________________________________________________________________________________________________________ On the lesser likelihood side there's the fact that such a CME would have to be Earth-directed. That is actually much lower than a 50/50 chance unless the "blast" from the Sun was full circumference. Assessing whether that case is a cyclical, regular or common event is extremely sketchy at best. There's the Suspicious 0bserver video with the words of Dr. August Dunning in reference to evidence of an enormous CME striking Mars: "It wasn't like it kept happening over geologic time. It's like it happened then didn't happen any more." Message 31962129
And there's a paper from 2012 I've found (so far): "Estimating the frequency of extremely energetic solar events, based on solar, stellar, lunar, and terrestrial records" agupubs.onlinelibrary.wiley.com (click on the names...they're not from lightweight institutions) "We conclude that flare energies for the present-day Sun have either a true upper cutoff or at least a rapid drop in frequency by several orders of magnitude below the scaled stellar frequency spectrum for energy fluences above about X40. Based on the direct solar observations and the indirect arguments presented in this study, solar flares with energy fluences above about X40 are very unlikely for the modern Holocene-era Sun. Setting significantly stricter quantitative limits than this for the most energetic solar flares than we have summarized in Figure 3requires that we observe a sample of several dozen very large flares on stars of solar type and of near-solar age. That, in turn, requires the equivalent of at least several thousand years of stellar time in the combined observational sample, to be observed in X-ray, EUV, or optical emissions. Additional, but less direct, limits could be inferred from estimated starspot coverages from many thousands of Sun-like stars in, e.g., observations being made by the Kepler satellite."
