** Progress in Earth and Planetary Science is the official journal of the Japan Geoscience Union, published in collaboration with its 50 society members.

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    Solid earth sciences

    202310202310

    Recent progress in research on source processes of great earthquakes using tsunami data

    Yuichiro Tanioka, Yusuke YamanakaYuichiro Tanioka, Yusuke Yamanaka

    Research on source processes, Great earthquakes, Progress in tsunami research

    Sources of great earthquakes in Sumatra, Indonesia (left) and those in Northern Japan, off Hokkaido and Tohoku, (right) discussed in this paper.

    This paper provides an overview of inverse studies that estimate earthquake source processes using tsunami-related data. Methods and techniques developed with those data associated with the 2004 Sumatra and 2011 Tohoku-oki earthquakes were reviewed. These events significantly impacted subsequent studies that focused on great historical earthquakes. Thus, recent advancements from studies on great historical earthquakes (M > 8) using old tsunami data, including documents and non-digital tsunami waveforms, have been reviewed. Another key earthquake was the 1700 Cascadia earthquake, and its source process was revealed using geological tsunami deposit data, which have led to a recent surge in prehistorical earthquake studies using tsunami deposit data. Considering this, the advancements in prehistorical earthquake studies have been reviewed. Finally, expected advancements in earthquake source process studies using tsunami-related data in the near future have been discussed.