Why is the Indonesian tsunami warning not activated?

In the case of tsunamis caused by earthquakes, ground tremors can be a warning sign, but the forecast of volcanic eruptions is much harder.

Search and rescue efforts are still ongoing in Indonesia after the deadly tsunami occurred in the Sunda Waist, killing more than 280 people. More than 1,000 people were injured and 11,600 people had to leave their homes. Pandeglang County, on the western tip of Java Island was the hardest hit, with 207 deaths and 755 injuries.

Anak Krakatau volcano is said to erupt under water, causing landslides in the sea and creating tsunamis . Experts cannot know the exact cause of the tsunami until the ultrasound underwater positioning system is deployed. However, it is too dangerous to do so at this time.

Volcanic eruptions are thought to cause tsunamis.

According to NY Times, Indonesian authorities also share the same views as experts. They said that at the time of the tsunami, in the seismic area, which enabled the evacuation warning and helped save people's lives when the tsunami was about to come. This is the second time this year, tsunami attacked Indonesia.

Indonesian disaster management spokesman Sutopo Purwo Nugroho said the authorities could not detect the tsunami and issued a warning because " we do not have an early warning system for landslides and landslides and What we have is an early warning system of tsunamis caused by earthquakes. "

According to the official, the challenge for them is to develop a warning system that can detect underwater landslides and volcanic eruptions. Nugroho also said that the warning system does not always activate when an earthquake causes a tsunami.

Specifically, on September 28, the earthquake occurred and led to tsunami hit Palau city on Sulawesi island but the siren did not sound. Some of the most populated areas of the city are built on top of land plots, which are at high risk of landslides. When the earthquake suddenly occurred, the solid land was easy to become muddy, and in the September disaster, more than 2,100 people were killed.

Guardian quoted Associate Professor David Kennedy of the University of Melbourne, saying that if there is a buoy network set up around Anak Krakatau volcano, warning 1-2 minutes before the tsunami hits is what most people are expected. According to Kennedy, the popularity of resorts at the beach is also the reason many people face the risk of tsunamis.

Indonesia has 147 volcanoes and 76 are considered active.