Researchers are reportedly headed to the Siberian area of Yamal to investigate a crater that have caught scientists by surprise.  In yet to be verified  arial video, the crater is about 200 feet wide and appears to have ejected rocks and earth from it.

Today's Washington Post has information about a giant sinkhole that has mysteriously appeared in Siberia:

Under no circumstance is the Russian peninsula of Yamal considered hospitable. Extending 435 miles into the Gulf of Ob, its subsoil is permanently frozen, chilled by temperatures that can plunge to 122 degrees below zero. The sun rarely shows in winter, and to locals called the Nenets, the name of the place translates to "the ends of the Earth."

For reasons no one has yet figured out, a massive, 300-foot-wide crater has just appeared. Seemingly out of nowhere.

According to video originally shot by a TV station run by the Russian Ministry of Defense — video which The Washington Post was unable to verify — the crater appeared about 20 miles from Yamal's biggest gas field, igniting an international intrigue.

http://youtu.be/2kMs05VaOfE

(read more about the crater here)