Geyzernoye (geyser) Lake was formed as a consequence of the 2007 landslide that dammed Geyzernaya River. Lake water is saturated with numerous chemicals that give it a bright turquoise color. The water is warm and on cool days there is a steam on the surface.
The landslide in the Valley of Geysers happened on June 3rd 2007, 2:20pm local time. Fallen rocks blocked the course of Geyzernaya River and created a 60-meter high dam. For the first four days after the slide the river slowly filled the newly created basin. The lake flooded Skalistyy (rocky), Konus (cone), Malyy (small), Bolshoy (large) and Shchel (crack) geysers upriver and came close to the main geyser platform (Vitrazh). On June 7th, water level reached its highest mark and the lake was over 1 kilometer long at that point.
On June 7th, 2007, at 7:30pm, the river pushed a way through the dam and the water level in the lake began to decline. In four hours water level went down 9 meters. The lake shrank, moving away from Vitrazh platform, and freed Shchel Geyser, which began to function like it did before the landslide. In the following three months water level in the lake fell two more meters as the river created a new course over the surface of the landslide. Bolshoy Geyser showed up above the water. Its first eruption after the landslide was seen on September 12th, 2007.
Currently, the water level in the lake has stabilized. Heavy rains and spring snowmelt cause 15—20 centimeters increase of water level.
Bolshoy Geyser is now at water level. When water in the lake rises, Bolshoy switches to pulsating spring mode; when water level falls, Bolshoy starts functioning as a geyser again. Malyy Geyser is now 12 meters deep underwater. It continues to function as a spring, shooting up a strong underwater jet. On the surface, above Malyy Geyser you can easily spot a large bubble several meters in diameter, which is created by the jet. Konus, Skalistyy and other submerged geysers and springs are now deep underwater and you can't see any traces of their activity on the lake surface.
Lake's surface area is constantly getting smaller, due to the fact that Geyzernaya River is filling the lake with alluvial sediments. There's a pebble spit growing where the river flows into the lake. In 2009, two years after the landslide, the spit was about 200 meters long. Lake's length in 2009 was approximately 750 meters, max length — about 100 meters, max depth — 26 meters.
If lake will continue to get filled with alluvial sediments, than in 10—15 years it can disappear with a alluvial plain taking its place. And it is possible that new thermal features will appear on plain's surface.
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