The sea is thought to have been named after the ancient Ligures people.
It reaches a maximum depth of more than 2,800 m (9,300 ft) northwest of Corsica.
According to a 1983 study, since 1977 a series of experimental analyses on sea-level variations at Genoa and Imperia highlighted "the existence of a seiche wave with a mean period of 5.8 hours", whose reasons weren't yet explained at that time.
The Ligurian Sea was modeled as a rectangular semi-closed basin with a longitudinal length of 40 km (25 mi) and a transversal one of 10 km (6.2 mi), in an average constant depth of 2,000 m (6,600 ft; 1,100 fathoms).
[2] The International Hydrographic Organization defines the limits of the Ligurian Sea as follows:[3] On the Southwest.