Potential Sunda Strait Tsunami Hazard due to the Deformation of Anak Krakatau
Shofia Karima, Karina Aprilia S, Uut Ihsan, Mirzam Abdurrahman

Bandung Institute of Technology

Abstract

The tsunami Sunda Strait event in 2018 is a prove that volcanic activity may trigger a devastating and unpredictable tsunami. Several findings indicate that this catastrophe was generated by the flank collapse caused by the instability of Gunung Anak Krakatau. Other processes of volcanic activity that cause tsunamis include pyroclastic flows, subaerial and submarine landslides, underwater explosions, blasts, and caldera collapse. In 1883, Krakatau Mount produced the largest tsunami event, and it is apparent that GAK is one of the threats in Sunda Strait that may potentially produce tsunamis in the future since it is still active now.
Based on current data of deformation Anak Krakatau, the aim of this study is to observe the tsunami wave heights, the tsunami arrival time, and the inundation at the Sunda Strait area. The western part of Java and the South part of Sumatera that has abundant activity (industries, tourism, and residential area) will be impacted when the tsunami occurs. Applying the shallow water equation model will analyze the tsunami threats in those areas.

Keywords: Gunung Anak Krakatau, Deformation, Tsunami model, flank collapse.

Topic: Marine Hazard, and Coastal Protection