In this excellent in-depth article, Sottnet gathered data showing that Earth was probably subjected to cometary events (direct impact and/or overhead explosions and/or electric disruptions) in 14,400 BP, 10,800 BP, 7,200 BP and 3,600 BP.
A short summary:
A catastrophic event, probably of a cometary nature, occurred ca. 14,400 BP. This number piqued my interest because it is a multiple of 3,600 (4 X 3,600 = 14,400).
An astronomical body following a very elliptical orbit around the Sun with a 3,600 year period can not be a planet but has to be a comet. Similarly to 14,400 BP, 3,600 BP was marked by a sudden drop in temperature.
The 7200 BP (5200 BC) Events are similar to 14,400 and 3,600 BP, we discover a sharp temperature drop revealed by ice core analysis
Only one date remains: the 10,800 BP event (3 X 3,600). Just like the three preceding dates, we notice a sudden drop in temperatures around 10,800 BP:
There is a clear correlation between vulcanism and cometary activity, and even more: cometary activity can be a direct cause of volcanic eruptions.
We have also discovered that cometary events and volcanic eruptions leave very similar traces. In addition, they are not mutually exclusive, both can occur simultaneously for the simple reason that cometary events do indeed cause volcanic eruptions.
The evidence suggests that a comet (or cometary swarm) interacted with the Earth ca. 14,400 BP, 10,800 BP, 7,200 BP and 3,600 BP. That is to say, on a 3,600 year cycle, meaning that we are due a repeat performance around now. Indeed, the American Meteor Society's records of observed fireballs worldwide over the past 13 years suggest that the 'show' might actually have already begun:
Read full article at:
https://www.sott.net/article/424968-Volcanoes-Earthquakes-And-The-3600-Year-Comet-Cycle