“Do you think the C 40,000 BC superwave event had anything to to do with this? Significant new information shows that the Campanian Ignimbrite (CI) eruption from the Phlegrean Fields, southern Italy, was much larger than hitherto supposed and in fact one of the largest late Quaternary explosive events. The eruption can be dated to 40,000 calendar years ago, within the interval of the so-called Middle to Upper Paleolithic ‘transition’. Its position can be precisely correlated with a number of other environmental events, including Heinrich Event 4 (HE4), the Laschamp excursion, and a particular cosmogenic nuclide peak.”
Yes, many of the events you describe here would have been caused by the 40,000 years before present superwave. Actually the Vostok ice core indicates that the beryllium-10 concentration peak (the cosmogenic nuclide peak) began its rise around 45,000 years before present (B.P.), or around 43,000 years B.C; see the Vostok Be-10 chart below.
The 40,000 superwave passage date that I had estimated from the observed polar azimuthal extent of the Fermi bubble relative to the galactic plane was based on the assumption that we lie 23,000 light years from the Galactic center. Other astronomers prefer to use a slightly greater distance estimate of 26,000 light years. If we were to instead use the 26,000 light year distance value, we would then calculate a superwave passage date of 45,000 years B.P. So we can say that the Fermi gamma ray bubble predicts that its associated superwave would have passed the Earth between 40 and 45 thousand years ago.
Looking at the Cariaco Basin radiocarbon record, we see that there was also a pronounced and prolonged rise in the atmosphere’s radiocarbon excess. This began around 44,000 years ago and peaked around 40,000 years ago; see graph below.
This too was likely due to the arrival of superwave cosmic rays from the Galactic center. At no time in the past 50,000 years did Earth experience such a pronounced and prolonged rise in atmospheric C-14 concentration. The superwave would have injected cosmic dust into the solar system and this would have aggravated the Sun causing an increase in severe solar storms. So it is not surprising that we find the Laschamp excursion coinciding with this event. Also Heinrich event H5 occurred in the midst of this event (42,000 to 43,000 years B.P.). As I describe in my dissertation update http://etheric.com/LaVioletteBooks/EUF-CD.html, Heinrich events mark times of pronounced glacier wave activity when sudden climatic warming caused mountainous waves of glacial meltwater to sweep across the ice sheets and out into the ocean, depositing continental debris far out to sea. This would be another symptom of a superwave passage. It is difficult to tell if the CI volcanic eruption was also causally associated with the superwave passage. For a causal connection one might either look to isostatic changes due to ice sheet thickening or thinning, or to gravity wave effects.
OC further inquired:
“Regarding the beryllium-10 concentration peaks (please remember I’m not a scientist), there is one around the time of the Toba super-volcano explosion … roughly 73,000 BC as well. What could be said about that event with relation to a superwave event (gravity wave connected?), or do we know?”
This is an interesting observation. Two major volcanic eruptions appear to correlate with the dates of major Be-10 peaks in the Vostok record, i.e., with passage dates of major superwaves. It would be interesting to do a complete statistical analysis of volcanic eruption dates to see if a sound correlation is found with Be-10 peak dates. I have not done this.