The 1883 and 2018 Krakatau tsunamis –new marine geophysical and sediment core evidence on their generation

David R Tappin1, James Hunt2, Stephan T Grilli3, Sebastian Watt4, Simon John Day5, Annette R Grilli3, Samantha L Engwell6, Steven Carey7, Susilohadi Susilohadi8 and Eko Yulianto9, (1)British Geological Survey Keyworth, Nottinghamshire, NG12, United Kingdom, (2)National Oceanography Centre, Southampton, United Kingdom, (3)University of Rhode Island, Narragansett, RI, United States, (4)University of Birmingham, School of Geography, Earth and Environmental Sciences, Birmingham, B15, United Kingdom, (5)University College London, London, United Kingdom, (6)University of Bristol, Bristol, United Kingdom, (7)Univ Rhode Island, Narragansett, RI, United States, (8)Marine Geological Institute, Bandung, Indonesia, (9)Lembaga Ilmu Pengetahuan Indonesia, Bandung, Indonesia