Bilbao lies of the outskirts of Santa Lucía Cotzumalguapa, situated approximately 370m above mean sea level [REF].
The dominant geographical feature close to the Cotzumalhaupa Nuclear Zone is the Volcán de Fuego, one of the most active volcanoes in the world, its crater rising to an altitude of 3835m above mean sea level at only a distance of about 21km from Bilbao itself.