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
Swansboro Country Airport Swansboro Country Airport Swansboro Country Airport is four air miles (6 km) northeast of Placerville, in El Dorado County, California. It is owned by the Swansboro Country Property Owners Association. Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but Swansboro is 01CL to the FAA and has no IATA code. Swansboro Country Airport covers and has one asphalt runway, 9/27, which is . The runways slopes downhill to the west. Night operations are prohibited, and is unattended. The airport has 25 aircraft are based at the airport: 21 single engine, 3 multi-engine and 1