Indonesia Conference Directory

The tsunami in the Sunda Strait on December 23 has killed around 430 people. There were no sirens heard in the cities and beaches to warn people before the deadly waves hit the coast. This tsunami was caused by the eruption of Mount Krakatau where the crater partially collapsed into the sea at high tide. The loss of life due to the eruption did not shake the seismic monitor significantly, and the absence of seismic signals that normally caused the tsunami caused the Indonesian geophysical agency (BMKG) to initially tweet that there was no tsunami. In fact, tidal monitors are not made to trigger tsunami warnings of non-seismic events. Because there was no seismic activity, the tsunami was not caused by an earthquake. Tsunami waves are not always preceded by tectonic earthquake activity. In fact, tsunamis can also be triggered by volcanic activity. Tsunami records that have occurred in Indonesia, 90 percent were generated by earthquakes, while 10 percent were generated by underwater landslides and volcanic eruptions. The approach taken in this study is qualitative and uses a case study method. Qualitative research is research that utilizes open interviews to examine and understand the attitudes, views, feelings, and behavior of individuals or groups of people. The results obtained from this study are expected to obtain communication channels between PVMBG and the BMKG related to the tsunami warning Early Warning System policy outside the existing system.