Systems and Methods for Mapping the Crust of the Earth

A method comprising:

• transmitting a radar signal at a predetermined frequency via a first radar antenna;
• receiving, via a second radar antenna, a reflected signal produced by the radar signal reflected from a subterranean formation;
• controlling a dwell time of the first and second radar antennas, wherein the dwell time is greater than one hour;
• generating an image of the subterranean formation using the reflected signal.

A distributed radar array system comprising:

• a plurality of radar units, each unit including a waveform generator;
• a transmitter, connected to the waveform generator, configured to generate RF signals within a bandwidth;
• an antenna configured to couple to the earth for conveying the RF signals;
• and
• a receiver configured to receive reflected signals of the RF signals from a subterranean region.