Earthquake

Imagine a table on which to build a toy country. On a table sprinkled sand hills. Instead of lakes are the saucer with water. At the foot of the mountain you have laid the city out of blocks. How can immediately destroy all this construction? It's enough to swipe at the table. What do we see? Sand Mountain has moved from his seat and fell asleep part of the city out of blocks. Splashed water from a saucer. Houses made of bricks scattered. Likewise, tremors from the depths of the earth can shake and destroy buildings in the city to stir up the ocean, cut the surface of the Earth's huge cracks. But what makes shudder huge stone slabs? The fact that the edges of these plates have a lot of rough spots and scratches, sharp edges and cracks. The ribs and giant projections tightly linked to each other, as the teeth of two giant gears. But the plates are constantly moving, and their edges are left in place because they can not change his position. Takes time and this leads to enormous stresses in the crust. But this can not last long. Some of the "tenacious" ledges do not stand up and break off with a bang, others recalling the bent steel plate, springs and released, koleblyuteya. B. This time the surface of the Earth trembles strongly with all that therein is, that is, there is the same as a town with a toy on the table. Something like this was during the earthquake of 1857 so far from San Francisco. Here for a few minutes the Pacific Plate has moved towards the North at 10 centimeters. After 15 years, these plates have moved again. There was a new powerful earthquake, but was particularly harsh consequences of khat stanza took place in 1906 when the Pacific and North American plate pushes moved relative to each other by 6-8 centimeters. Sometimes a collision leaves one plate to another. There are already beginning to rub and collide, no edge plates, and their surfaces. Contact area between plates increases dramatically and thus the voltage multiplied. In such places there are the most destructive earthquakes.