Michel Menken 02/17/2006
formation of a tsunami triggered a tsunami
are 90 Percent tsunamis, but also
volcanic eruptions and landslides can trigger a tsunami.
For example, in 1883, exploded near Sumatra
underwater volcano and swallowed a volcanic island. The result was a 26 meter high wave that claimed 36,000 people lives.
If a landslide occurs on the edge of a sea, then huge stones into the water, triggering a tsunami that can be up to 30 meters high.
tsunamis can be caused by cosmic projectiles (planets). That's about 65 million years ago have been the case, as a planet has fallen into the Indian golf and has triggered a tsunami that the extinction of the dinosaurs has caused in the Gulf.
The tsunami of Sumatra
was the tsunami of Sumatra, because the oceanic crust is pushed under the crustal plate of Sumatra. This is called subduction. You got caught, and the plate of Sumatra turned away. Is formed on the coast of Sumatra, a deep sea trench. Due to the pressure shot up the plates back. The seabed has been raised by 3 meters. This lack of space and the earthquake of 9.3 intensity of the tsunami was triggered. The water was pushed to the coast of Sumatra.
The tsunami has emerged. The water was moving with periodic, oscillating movements to shore. By the bottom slope at the coast, the waves are higher and faster. The water now has a speed of a jet aircraft (700 km / h). In contrast, it was still on the open sea as fast as a sprinter (10 km / h). This process is called amplitude. On the coast, then fell the waves her over the mainland of Sumatra, leaving destruction and 300,000 deaths.
If the tsunami is created, the course of each tsunami is almost identical.
0 comments:
Post a Comment