Submitted by drupaladmin on Wed, 03/10/2010 - 14:39 Martin Howse conducting artistic measurement in Gijon, Octobre 2008. Background, Erich Berger. Martin uses a self-built wide-band antenna to use existing radiation and measure its reflections on different locations. Under the pavement of this square is an ancient salt mine and fish factory. Electromagnetic archeology is supposed to be able to identify the location of the underground structure.