Beginning of Tsunami Archeology

研究表明，大坂平原绳文遗址很少的原因是由于南海地震的反复袭击。绳文海侵期的抬升特征足以将其冲刷掉。作为第一步，我们恢复了大坂湾的古海底地形与大量的钻孔数据和冲积沉积物的厚度。第二步是利用南海海槽地震模式进行海啸数值模拟。在这种考虑下，2011年东日本地震被讨论，以打开发生的可能性。此外，我们还利用了对太平洋沿岸沿着低地海啸存款钻孔资料的分析结果。因此，我们可以建立海啸考古学的开端。

In this study, it was made clear that the reason why Jomon ruins were very few in Osaka plain was due to repeated attacks of Nankai earthquakes. Their run-up characteristics in Jomon transgression age was enough large to wash out them. As the first step, we restored ancient bottom topography in Osaka bay with many boring data and thickness of alluvial accumulated sediment. And second step was numerical tsunami simulation with the model of Nankai trough earthquake. In this consideration, 2011 East Japan earthquakes were discussed to open the possibility of occurrence. Moreover, we used the analytical results of the boring data on tsunami deposit in lowland along the coast facing the Pacific. Consequently, we could establish the beginning of Tsunami Archeology.