Most deeper water wrecks tend to look like that, particularly with sudden sinkings or where there is a lot of trapped air. Air is what does that damage combined with sea pressure. This is why with the Titanic the forward 2/3rds of the ship are virtualy intact other then impact damage and the back section is almost flattened. The forward section was almost completely flooded while the back section was not. Now as stated above an explosion like that will also rip a ship apart. I have to admit though that I am surprised by how close the clusters of wreckage are after such an explosion.