A magnitude 8.2 earthquake off the coast of Chile not too far from Teck's Quebreda Blanca. (Roughly speaking.) All the miners have reported in saying there was no damage to their operations, including Teck. However, the roads and ports could be blocked. Despite everyone saying their mines are okay, there have been unconfirmed reports of accidents in some mines. I suspect we'll start to hear more about it when the sun rises and people can see what has happened.

Iquique is a key copper exporting port, close to Chile's main copper mines. The area has been on high alert in recent weeks after an unusual number of tremors.

Chile is the world's No. 1 copper producer but key mining firms said there was no serious damage to their operations.

State-owned miner Codelco reported no harm to its workers or mines, and said its operations in northern Chile were normal.

Chile's Collahuasi copper mine and port had no immediate problems following the quake, chief executive Jorge Gomez told Reuters, and mining company BHP Billiton said it had not received reports of damage.

--http://www.reuters.com/article/2014/04/02/chile-earthquake-idUSL1N0MU00R20140402