Fig. 2: Evaluation procedure of the found events.
From: Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE
a Mean data of the two events (7176 BCE left, 5259 BCE right) with 1-σ errors and result of 1000 Simulations (blue lines) The fitted Gaussian shaped production spikes for all simulations is also shown. b Distribution of the simulated ∆14C increases (blue bars) with a gaussian fit (dashed line). c Distribution of excess 14C production (blue bars) with Gaussian fit (dashed line).
