Earthquake - does it affect units in docks?
Many of the cards in my version of Mine a Million are open to a bit of interpretation, but I think this one is fairly clear.


This card specifically mentions "warehouse stocks". It does not mention barges or ships.
Similar cards for losses at the pithead specify "on the ground (not in lorry/barge)" and/or "in lorry/barge" (wording not exact, I couldn't quickly find the wording online and I'm not at home to check). 


On the basis that the cards make it very clear when stocks in a barge at the pithead are at risk, I suggest the interpretation that stocks in a barge or ship are safe against earthquakes.

In fact, just last night when that card was showing, I put all my stocks (from both my players) in a ship and left my wife's stocks (from both her players) sitting in the warehouse. Unfortunately she managed to sell them before anyone rolled a 1 or 6 :(