China News Service, January 2, According to Singapore's Lianhe Zaobao, the tsunami of the Sunda Strait in Indonesia came without warning. This disaster forced relevant authorities around the world to face up to whether they have made sufficient preparations to deal with the sudden outbreak of natural disasters.
The tsunami that occurred on the evening of December 22, 2018 hit the surrounding coastal areas, claiming about 430 lives, more than 7,000 were injured, and more than 40,000 were left homeless.
Before the huge waves hit, there was no tsunami warning sounded in coastal towns and beaches, and people didn't know that the disaster was coming.
Indonesia Landslide caused by the eruption of the Krakatoa volcano triggered a shock equivalent to a magnitude 3.4 earthquake and thus triggered the Sunda Strait tsunami on December 22, 2018.
Earthquake experts and relevant authorities said that the tsunami was formed by the superposition of multiple factors and was obtained by the existing early warning facilities that could not be detected in advance.
The expert community therefore believes that this natural disaster sounded the alarm, and it is necessary to study the causes of the tsunami more deeply and strengthen disaster prevention preparations for the tsunami.
Earthquake expert Hicks of the University of Southampton, UK, said: "Indonesia (tsunami) has confirmed to the world that there are too many possible factors that trigger tsunamis. We need to conduct more research to understand those situations with a smaller probability of occurrence."
Most tsunamis are caused by earthquakes, but the cause of this natural disaster in Indonesia is a special cause. The volcanic eruption of Krakatoum, the son of volcanic volcanoes caused 180 million cubic meters or about two-thirds of the mountain to collapse, stirring up huge waves of 5 meters and rushing towards densely populated areas along the coast of Jia Island and Sumatra.
volcanic eruption did not significantly touch earthquake monitor , and there were no signs of earthquakes related to the tsunami, resulting in the Indonesian National Disaster Reduction Agency making a misjudgment. When the tsunami had landed, it also announced through Twitter that "there is no tsunami threat."
The agency's director of the geophysics department, Mohammed, said in an interview afterwards that their tide monitors do not have the ability to detect tsunamis caused by non-earthquakes, so they did not issue a tsunami warning. In fact, not only Indonesia, but even advanced Japan does not seem to have the ability to do this.
Tomohiko Imura, director of the Japan Institute of International Disasters, said he does not believe that Japan's existing early warning system can detect tsunamis similar to that in the Sunda Strait.
"This type of risk also exists in Japan, because there are 111 active volcanoes in Japan, , but their ability to monitor tsunamis caused by volcanic eruptions is very low."
As early as 2012, a study released by the London Geological Society listed Krakato's son volcano as a "tsunami threat", but failed to attract attention.
There were 24 minutes from formation to landing in the tsunami, which some experts believe was enough to touch some monitors.
However, unfortunately, the float system set up by the Indonesian authorities in the waters across the country has failed since 2012 due to lack of money to repair and has been damaged. These buoys are connected to sensors placed on the seabed and can be used to detect tsunamis.
Indonesian National Disaster Reduction Agency spokesman Sutopo admitted that 1,000 tsunami alarms are needed across the country, but this will cost 7 trillion rupiahs, which is about the same as Indonesia's disaster emergency funding for the whole year of 2018, so only 56 alarms are currently set up.
with your president Jokovic last week ordered the Disaster Reduction Agency to purchase a new early warning system, which later stated that it plans to set up three tsunami buoys on islands around the Son of Krakato.
Indonesia is located in the Pacific Rim volcanic belt, with frequent volcanic eruptions, earthquakes and tsunamis. According to official data, 62.4% of Indonesia's population is threatened by earthquakes and 1.6% is threatened by tsunamis.
Philippines Tal volcano on Luzon Island also caused a tsunami wave in Tal Lake due to an eruption.
Philippines Deputy Minister of Disaster Reduction Solidem pointed out that the Indonesian tsunami shows that the Philippines also needs to strengthen response preparations for volcanic activities due to the possibility of tsunami.
