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
Pere Valentí Mora Mora was mainly used as a backup to Salvador Sadurní and Pedro María Artola during his spell at "Barça", but still featured in the 1978 Copa del Rey Final. He also held a record of being 406 minutes without conceding in European competitions, which was subsequently broken by Víctor Valdés. In the summer of 1979, Mora signed with fellow La Liga side Rayo Vallecano. He was an undisputed starter during his stint, appearing in no less than 34 matches per season but suffering relegation in his first. In 1983, Mora joined Real Murcia in the top level. He retired three