UPDATE 2-Magnitude 6.8 earthquake hits northern Chile, copper mines say unaffected <!-- no image --> <div>A magnitude 6.8 earthquake struck in the mine-heavy northern Chile early on Wednesday, monitoring groups confirmed, though mining companies told Reuters their operations were not impacted.<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ttPaGW5WenA:yKX5AX8PUK8:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ttPaGW5WenA:yKX5AX8PUK8:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=ttPaGW5WenA:yKX5AX8PUK8:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=ttPaGW5WenA:yKX5AX8PUK8:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=ttPaGW5WenA:yKX5AX8PUK8:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/ttPaGW5WenA" height="1" width="1" alt=""></div> Posted by Reuters