Gaffes

The helicopter is military green in the CGI long shots, but blue in the practical close-ups.

The Chevrolet Matiz's plate at the beginning of the movie is wrong for the Italian standard: the format is correct (with some minor imperfections) but that plate will be available only in 5 or 6 years from now (2015).

The prologue depicts a volcano near Puerto Villamil of the Galapgos Islands erupting violently, with a Plinean-type eruption including a large pyroclastic flow. All of the volcanoes on the Galapagos Islands are shield volcanoes, which do not erupt in this manner. Their eruptions are similar to Hawaiian volcanoes, with little ash or debris and fluid, long-lasting lava flows.

In some of the "husband scenes" we can see the Teatro La Scala: this is impossible because it is in Milan, about 750kms away.

A subtitle identifies the prologue as taking place in "Puerto Villamil - Galapagos Island." Galapagos is not a single island, but an archipelago, the Galapagos Islands. Puerto Villamil is located on the island Isla Isabela.

While driving to Pompeii, characters stop in a ENOS service station: but actually there's no ENOS service station in Italy.

When lava bombs are raining down on a Naples street, all of the storefront signs are conspicuously, exclusively in English.

When the burning rocks rain down on Naples, a man's arm catches fire. The pyrotechnic barrier gel on the actor's arm is plainly visible.

When the heat wave strikes Pompeii, it vaporizes people attempting to escape, yet has no effect on foliage, a vehicle, or any of their other surroundings.

Multiple earthquake shots show trees and other scenery remaining perfectly still as the actors throw themselves about and the camera shakes.

A shot of the streets of Naples during the eruption shows only the main characters reacting appropriately, with all the people in the background walking along casually completely oblivious to the huge fireball-spitting mountain.

Mykaela remarks that only one person, a prisoner, survived in the direct path of the 1902 volcanic eruption in Martinique. In fact, two people survived.

During the helicopter chase scene, the co-pilot states that they are "almost at firing range" when external views show the helicopters to be within a few meters of each other. The helicopter would have been within firing range much further away.