Anak Krakatau Landslide Tsunami Relapse Potential Hazard

Abstract

Mount Anak Krakatau has a potential hazard that will emerge within 50 years from present time when the peak cone reaches a height that critical to landslides. The Tsunami wave runup as high as 80 meters sweep the steep coast Sebesi and Rakata islands is measured inside the Krakatau volcano complex, during the eruption event and followed by flank collapse on December 22, 2018. The finite volume numerical method of the 3-D Hydrodynamic Model is used to evaluate the potential hazards of Anak Krakatau. Landslide materials with different densities and volumes will be simulated and evaluate which density produce the best estimate of the potential for Tsunami Run-Up waves within the Krakatau complex and Tsunami waves that will sweep and damage the coastal areas of the Sunda Strait. More importanly, the simulation results will provide the tsunami-induced surface current signature information that can be observed by broad range measurement devices, together with an efficient early warning system on the coast, will save life.