- Influence of normal tide and the Great Tsunami as recorded through hourly-resolution micro-analysis of a mussel shell

Low-resolution profiles of Mg/Ca, Sr/Ca and Ba/Ca ratios along the maximum growth line of the mussel shell sample. (a) Low-resolution profile of Mg/Ca ratios along the growth line. The horizontal red line and vertical green line show a threshold value and the date of the great tsunami, respectively. Ovals show the data higher than the threshold. (b) Low-resolution profile of Sr/Ca ratios along the growth line. (c) Low-resolution profile of Ba/Ca ratios along the growth line. The simplified scales of the higher insolation (HI), higher temperature (HT), and lower tide period (double-edged arrow) are shown above the profiles. The periods of HI, HT, and lower tide were certified based on the threshold values in Figure 7.