Siljan Ring proved inconclusive. Drilling for natural gas was resumed in the late 2000s and continues as of mid-2012. The scientific premise for prospecting of this sort is based on the work of physicist Vladimir Kutcherov, who is cooperating with Igrene, the company financing the drilling operations. Siljan Ring The Siljan Ring () is a prehistoric impact crater in Dalarna, central Sweden. It is one of the 15 largest known impact craters on Earth and the largest in Europe, with a diameter of about . The impact that created the Siljan Ring occurred when a meteorite collided with the Earth's surface during
Siege of Mora western border with Nigeria, was guarded by a company of "Schutztruppen" (protection troops) under the command of Captain Ernst von Raben. Initially the garrison consisted of 14 European and 125 African soldiers, most of whom were tough, well-trained Askaris. Von Raben managed to recruit 65 more men before the Allied siege began. On 13 August, the German commander relocated the garrison from the fort on the plain to positions partway up Mora mountain. This gave them a commanding view over the surrounding area and easy access to water. Mora mountain, which would become a fortress during the siege, was approximately