סמינר מיוחד: Tsunamis and tsunami deposits: With all memory and fate driven deep beneath the waves

Tsunamis and tsunami deposits: With all memory and fate driven deep beneath the waves

Tsunamis are rare events whose occurrence is linked to the probability of the parent processes, such as earthquakes, landslides, volcanic eruptions and meteorite impacts into oceans. Tsunamis compared to other natural hazards are unique in that their physical impact can engulf a much larger geographical area, exposing much larger stretches of coastline to their destructive power. Yet, there have not been enough tsunami event in any given region to employ to instrumental record only for meaningful tsunami hazard assessments. Hence the geologic record of tsunamis needs to be interrogated. In my talk, I will present simulation techniques that enable us to retrieve important quantitative information about the causative tsunami flow from tsunami deposits. I will show how sandy deposits can be used estimate flow speeds and eventually offshore wave characteristics. I will present how uncertainties can be quantified, and also how similar techniques can be employed to estimate flow conditions during storms. I will end my presentation with a discussion of an extreme tsunami and storm deposits: boulders. All the examples presented lead to the same important message: the gap between theory based, and field tsunami and storm research needs to be narrowed (or closed) to make more significant progress in the future


תאריך 9/05/2017 13:00 14:30
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