MERCALLI Scale of 12 degrees to evaluate an earthquake or earthquake. It is determined by the level of damage produced and not by the intensity of it. Its degrees are 1 Very weak 2 . Weak 3 Mild 4 . Moderate 5 . Little strong 6 . Fort 7 . Very strong 8 . Destructive 9 . Very destructive 10 . Disastrous 11 . Very disastrous 12 . Catastrophic