The most intensive mapping to date of the sea floor off Spain's coast is being undertaken by a Spanish government team. The first phase of this extensive geophysical survey, called the Spanish Exclusive Economic Zone (ZEEE) Project, was completed in February 2000 and focused on the Balearic Sea and the Valencia Trough in the Western Mediterranean (Figure l). The geomagnetic data acquired for the Valencia Trough area has been reduced and stored as a data base, and seven scalar magnetic anomaly maps have been produced. Four maps with scales of 1:200.000 were published in 1999 and two more will soon be printed. A map of the entire area at a scale of 1:500.000 is planned for 2001. All of the maps offer a complete and up-to-date overview of the region's magnetic character.