About 250 miners were underground when the quake hit southern Poland, near the border with the Czech Republic. Seven were trapped 900 meters (2,950 feet) beneath the surface, but two of them have since been rescued.
A 3.4 magnitude earthquake in southern Poland jolted a coal mine Saturday morning, initially trapping seven miners more than half a mile (almost 1 kilometer) beneath the surface.
Eight teams of rescuers were at the Jastrzebie Coal Company site near the Czech border, trying to locate the missing miners.
Katarzyna Jablonska-Bajer, a spokeswoman for the coal company, said the blast was unusually strong. "There has never been such a powerful tremor at the mine."
Coal in Poland: Coal mining remains a major industry in a country still heavily dependent on the dirty fuel source for electricity and heating. But Poland is beginning to move towards cleaner renewable energy sources.
Coal in decline: The government's statistical office reports that 58.7 million tons of coal were extracted in 2017 — a decline of 4.8 million tons from the previous year.
Safety improving: A 2016 report by Poland's State Mining Authority, in the southwestern city of Katowice, concluded that mine safety in the country was improving. The report said the 2,074 mining accidents in 2016 represented a 26-percent decline over 2012. But the number of fatal accidents (27) in 2016 was virtually unchanged from four years earlier.
bik/aw (AP, Reuters, AFP)