It happened in 1974. Specifically, on February 3.
The Liberian flag merchant ship, had left the day before Marseille towards the Algerian coast, carrying oranges, iron, primers for explosives and chemicals on board. The explosives had been stowed in the ship's bow. Due the bad weather, with strong winds and high waves, there was a chain reaction explosion on board that caused the fire in the ship. Only four of the fourteen members of the crew saved their lifes in the fatal accident.
More than 40 years later, they are still recognizable remains of the old engine room of the 'Francina', 12 meters deep, near the cliffs of Cala Morell