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Data from the Norwegian lyttestasjoner reveals how the tsunami started: Earthquakes on the strength 4,9 triggered the tsunami

There was an earthquake on the strength of a 4.9 that triggered the tsunami. Our lyttestasjoner of the Hamar and the Soup picked up the measurements. The volcanic eruption triggered the earthquake, " says Anne Strømmen Lycke, managing director, Norsar, which among other things is responsible for the registration of earthquakes.

at the time Of writing is 222 people confirmed to have died after a tsunami hit parts of western Indonesia. Dødstallet are expected to rise, and 843 are registered injured. The material damage is enormous.

VICTIM: Redningsmannskap by Carita Beach move the casualties after the disaster. Photo: AP / NTB Scanpix Show more

According to the indonesian authorities is causing an eruption in the volcano Krakatau. It has probably led to an underwater landslide which in turn led to the tsunami.

It is the Pandeglang region in Banten province that is hardest hit.

Great damage

A meterhøy tsunami washed over the country without any prior notice. There should have been some alerts about the wave in the forefront. Roads in the area are destroyed and do the job for redningsmannskap more difficult.

- We are all messages that a tsunami has hit Sundastredet, especially by Serand, Pandeglang and South Lampung, said the agency's spokesman Sutopo Purwo Nugroho to Metro TV on Sunday morning.

ERUPTION: A satellite image from NASA shows the askeskyen that spreads over Sundastredet in Indonesia after an eruption of the volcano Anak Krakatau. The submarine landslide should have been triggered when the volcano had its eruption. Photo: NASA/ NTB Scanpix Show more

Several hundred homes are destroyed, according to the spokesman. Indonesian authorities are asking people to stay away from the coast, in fear that it may be more tsunamis, reports the BBC.

" We are waiting on updates about the volcano. If aktiviten get worse, so we must be prepared, " says Rahmat Triyono, the head of Indonesia's meteorology, and geophysics - and klimabyrå (BMKG), according to the channel.

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- This tsunami is different than tsunamis caused by earthquakes. Tsunamis that come after an earthquake, has never yet brought forth several subsequent tsunamis. But this is different. A burst can be initiated by small tremors, which then can be greater, says Triyono on.


There have been similar events in Norway, and Anne Strømmen Lycke draws Storeggaraset, which should have happened about 8200 years ago. Lycke has been part of to map the undersea landslide in connection with the development of the Ormen Lange field.

Storeggaraset has been simulated, and the consequences must have been enormous. Tsunamibølgene that hit the coast of Møre, may have been 10-12 metres high. In the fjords to the waves have reached a height of 40-50 metres.

TSUNAMI: 222 people have been confirmed dead after a tsunami hit the Sundastredet in Indonesia Saturday. Dødstallet are expected to rise. Video: CNN Show more

the Waves get a booster effect inside a funnel. Sounds and fjords provides forstrekningseffekter, because there is more energy in smaller areas, " explains Norsar-director.

Stone in the water effect.

Lycke says such underwater landslides and avalanches are common.

the Breeds can be large and can set up large or severe tsunamis. We have seen that geological traces of, " she says and adds:

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- Underwater landslide could be unstable edges or by earthquake or volcanic eruption puts in the time process.

Lycke explains that the effect of a tsunami as throwing a stone in a water.

the Energy goes in the ring out from the fokalpunktet, and you are right in the fokalpunket, the water will move as a call beyond.

Lycke believe the devastation in Indonesia would have been greater if the volcano was located further away from the mainland.

It could have been worse if the waves had had time to build up, " she says.

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