It is obvious to me that this stcok is suffering under such an attack. Here is a post I made on the Petrobakkan board.
I don't have a guess but the one sided nature of this decline tells me you have computer algos attcking the stock because these Canadian Small and Midcap producer stocks are all acting the same, There are a few like CPG holding up. These algos are set up to sell a list of stocks under certain perameters until something changes in the action to cause a reversal(covering) of the position. These algos are proprietory so the perameters are hard to get a handle on.