I'm not a Hull Technician but from looking at the photos I'm seeing more evidence of structural failure than an explosion.
Poor loading and weight distribution or maybe resonant frequency of the waves against the hull? Otherwise I'd guess sabotage from within the ship to weaken the hull in critical places.
I can explain it to you but I can't understand it for you.
"Any man who thinks he can be happy and prosperous by letting the Government take care of him; better take a closer look at the American Indian." - Henry Ford
Corruptissima re publica plurimae leges; When the Republic is at its most corrupt the laws are most numerous. - Publius Cornelius Tacitus