A Tsunami has once again hit the island nation of Indonesia, this time especially on the Islands of Sumatra and Java. According to the authorities, at least 168 people were killed and more than 600 were injured, many are still missing. Again and again it comes in Indonesia to such a devastating flood waves. In the case of the Tsunami disaster at Christmas 2004, more than 160,000 people have died there. Why does it always return to the island state?


Indonesia is located in the geologically active Zone of the earth. The archipelago of good 17,500 Islands that forms the Western foothills of the Hyper-active Pacific ring of fire, the horseshoe over 40,000 km around the Pacific ocean moves. Where tectonic plates collide, a massive geophysical forces. As a result, it comes in Indonesia to earthquakes, volcanic eruptions and landslides, which could trigger Tsunamis.

in Most cases, Tsunamis are created in a specific geological situation In the area of a so-called subduction zone, a continental plate is pushed under the other and melted. The resulting voltage discharges on a regular basis in the Form of earthquakes, in which large areas on the sea floor moved vertically.

That devastating waves to occur, you can imagine just. Think of a glass of water placed on a table before you with great force to the bottom of the table.

Video: volcanic eruption in Indonesia


it was Different than most of the tsunami triggered the three-metre-high wave from Sunday by a volcanic eruption. Probably, the Indonesian Agency for Geophysics (BMKG) had, therefore, first of all, the all-clear, because it had been in the Region of not a stronger earthquake. The researchers stopped the Tsunami, first of all, for a frequently occurring tidal wave.

Only hours later, it became clear that, most likely, an eruption of the volcano Anak Kakatau was the cause for the Tsunami. Accordingly, the Eruption had triggered a landslide under the water, which led to the flood wave. The Situation has worsened, according to the Indonesian civil protection, because at the time of the wave nor flood prevailed. In such a Situation, a Tsunami is difficult to predict, because the waves often occur just a few minutes after the landslide.

The volcano Anak Kakatau in the Sundastraße, about 80 kilometers West of the capital, Jakarta, has been active for many years, partly he shakes several Thousand Times per day. Again and again, authorities are warning of a renewed outbreak. Approximately five meters of the volcano per year is growing, and is now about 400 meters high.

The child of Krakatau

The Anak Krakatau is located in the same place as the Krakatoa, which exploded in a tremendous eruption in August, 1883, and was completely destroyed. Also, the former Eruption trigger a Tsunami, more than 36,000 people were killed. Over the years, formed at the junction between the Indonesian Islands of Sumatra and Java, Anak Krakatau – the “child of Krakatau”.

In Indonesia, there are about 130 active volcanoes, more than in any other country in the world. Not only are they dangerous because they can trigger Tsunamis, but also for its lava flows and ash clouds.

Still, millions of people live in the shadow of volcanoes because the volcanic ash makes the regions especially fruitful. Farmers on Java can retract per season, often three rice crops. Many take the dangerous neighbors, therefore, in the time of purchase.


Sam Yoon has many years of experiences in journalism. He has covered such areas as information technology, science, sports and politics. Yoon can be reached at 82-2-6956-6698.