1. A multi-spectral imaging system comprising: a first sensor sub-system configured to receive electromagnetic radiation in a first spectral band from a scene and to provide a first image signal, wherein the first spectral band includes the ULF/VLF spectral band; a second sensor sub-system configured to receive electromagnetic radiation in a second spectral band from the scene and to provide a second image signal, wherein the second spectral band includes the visible spectral band; a processor coupled to the first and second sensor sub-systems and configured to produce a ULF/VLF image of the scene from the first image signal, and a visible image of the scene from the second image signal, the visible image having a variable lateral magnification, wherein the variable lateral magnification includes a gradient magnification across the visible image; and a display coupled to the processor and configured to display the visible image overlaid with the ULF/VLF image.