Tsunami events with extreme effects on sedimentary transport or considerable alterations of the coastal configuration are rather rare regarding human history, but considering geological timescales they occur frequently. At least 100 megatsunami in different parts of the world have been recorded in the past 2000 years—but presumably far more have failed to be noticed during historical times and ...

Quantitative and semi–quantitative procedures using a portable energy dispersive X–ray fluorescence spectrometer (portable XRF) were applied to geochemical studies in fault rocks, lake sediments, soils, including paleotsunami deposits. The results obtained are as follows:

Abstract Paleotsunami studies along the Pacific coast of Tohoku, northern Japan, have been considerably developed recently, particularly after massive impact 2011 Tohoku-oki tsunami. Nevertheless, in southernmost Shimokita Peninsula, pertaining to paleotsunami are underdeveloped, leading a vague understanding tsunamigenic sources northward Tohoku region, with incomplete hazard evaluation. depos...