GEOLOGY

Detailed explanation-1: -Lightning is a sudden electrostatic discharge that can be seen in the sky, and it doesn’t generate any vibrations on the surface of the Earth or in the ocean, so it doesn’t cause a tsunami.

Detailed explanation-2: -A tsunami is a series of enormous waves created by an underwater disturbance usually associated with earthquakes occurring below or near the ocean. Volcanic eruptions, submarine landslides, and coastal rock falls can also generate a tsunami, as can a large asteroid impacting the ocean.

Detailed explanation-3: -Depending on the location of a ship, people onboard can feel both earthquakes and tsunamis. The rapid vertical movement of the seafloor, which abruptly displaces a large volume of seawater, causes tsunamis.

Detailed explanation-4: -If the ship were to sink slowly then a wave of only a few centimeters would be generated, however if it were to slide quickly down the steep slope it lies on, waves of a few meters could threaten not only the immediate coast, but the Italian mainland and the coastline on the island north and south of the ship.