Yellowstone National Park
Researchers found that in the U.S. state of Washington is 150 thousand people in the face of the threat posed by a small lake. Mountain Renir is 108 km southeast of Seattle and included in the chain of the Cascade Mountains, stretching along the coast of North America to 1100 km. Its peak rises to 4392 m above sea level and often hidden behind clouds. Surrounded by mountain glaciers 26 lies a small lake only 15 x 20 m. It is melt-water.
Sulfur dioxide rising from the volcano crater, penetrating into the water of the lake, he takes her to react and form sulfuric acid. Acid changes the structure of rocks that made fragile. The volcano is one million years. During this time volcanic gas loosened rocks. The collapse may overwhelm the top, and then on settlements located under the mountain, attacked a landslide. On the slopes mountains there are trees buried under the cover of soil and stones.
Probably, landslides, triggered by release of volcanic gases, have already been on Renire. They developed a speed of 80 km per hour, and swept away everything in its path. 25-ton piece of rock that was once the top of the Fe-Ner, is now in the valley near the village of Ortingom. According to the calculations of scientists every 500-1 000 years to happen Renire similar disasters. Another lake-killer is in Wyoming in Yellowstone National Park. Alpine lake covers an area of 350 square kilometers and located in the southeastern part of the park. 10 000 geysers and geothermal sources say that this is a region of volcanic activity. At the bottom of the lake, scientists found the top and the height of 30 m, covering an area equal to five football fields. Under the bottom of the lake at a distance of only 5 km runs rasskalennaya magma, which has a temperature of 500 degrees. It threatens the geothermal breaks. When volcanic gases break through the water, the lake is a giant wave, spreading around the stones.