We have published an extensive update to our old article with almost the same name, read here.

We postulate that - due to a dendrochronological error of 218 years - an extreme narrow ring event in Scandinavian pine tree-ring chronologies at -329 CE is contemporary with the “Hallstatt gap” in central European oak tree-ring chronologies. See also the termination of the work at the old Hallstatt salt mine which is dated on dendrochronological grounds around -570. Based on archaeological/radiocarbon evidence however, the Hallstatt settlement (its cemetery) was abandoned first around -350. This means that there are 220 years difference between the end dates at Hallstatt assessed with different dating methods, a stunning agreement with our postulated 218 years error.

We further postulate a large cosmic catastrophe with impacts distributed over north-western Europe as the cause for the -329 extreme narrow ring event which led to large scale deforestation and migration among the surviving people, the Celtic expansion.