About: http://webisa.webdatacommons.org/433158604

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	He could mean that he is sending an alternating current through the coil of wire (AC), and he is creating a fluctuating magnetic field, so basically what he is creating is an electromagnetic wave that will reach the surface.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com