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On Yamal there was a strange sinkhole+video
Giant hole of unexplained origin and surprisingly even form was discovered in the Siberian Yamal Peninsula when viewed from helicopter. The funnel is so enormous that it easily could fly the helicopter that found her. The width of the funnel is at least 80 meters, and the depth of one judge is not taken, because it is several times the width. To see the funnel, you need to get to the edge of the forest about 30 km from the largest gas Deposit on Yamal called Bovanenkovo.
To investigate an object on the Yamal has directed a research team. Scientists will try to establish possible causes of such an unusual collapse. Already commented that one of the reasons may be climate change. By mixing water from the ice left over from the sea on the Yamal Peninsula salt and natural gas has occurred underground explosion, the catalyst for which was the temperature rise of air due to General climate warming in Siberia.
For pictures only you can say, that in the event such a huge hole, it was clearly thermal processes, because the funnel is painted in black color that is very similar to the remains of burning. The crater itself was about 2 years ago, although was only discovered now. If the version of the underground explosion and the warming is confirmed, this will have a serious climatic threat to natural gas production in the region.
Source: ecowars.tv/