Time profiles of the measured cosmogenic isotopes (histograms with error bars) for the period around AD775. Solid dots represent the enhancement expected in each data series assuming the AD775 event scenario discussed here (¹⁴C production Q = 1.3 × 10⁸ at/cm²). A) INTCAL09 5-yr samples global atmospheric Δ¹⁴C (Reimer et al. 2009); B) quasi-decadal ¹⁰Be content in the Dome Fuji ice core (Horiuchi et al. 2008), our model data is shifted by 5 years to match the observed data; C) quasi-decadal ¹⁰Be content in the GRIP ice core (Yiou et al. 1997).