POLKOWICE, Poland (Reuters) — At least six miners are missing and two died after an earthquake occurred at the Rudna mine in Polkowice in southwestern Poland, state news agency PAP reported on Tuesday (November 29). An earthquake of magnitude 4.4 struck at 9:09 p.m. (2009 GMT), according to the U.S. Geological Survey. It said the quake was very shallow, only 10 km (6.2 miles) deep, which would have magnified its effect at the mine […]