Patent ID: 8566036

Claim:
A method for surveying, comprising; detecting, by an electromagnetic sensor, an electromagnetic signal generated by a subsurface earth formation in response to a passive-source electromagnetic signal, wherein the electromagnetic signal is generated by an electroseismic or seismoelectric conversion of the passive-source electromagnetic signal; detecting, by a seismic sensor, a seismic signal generated by the subsurface earth formation in response to a passive-source electromagnetic signal, wherein the seismic signal is generated by an electroseismic Cir seismoelectric conversion of the passive-source electromagnetic signal; and receiving, by a signal processor, the electromagnetic signal from the electromagnetic sensor; receiving, by the signal processor, the seismic signal from the seismic sensor; and processing, by the signal processor, the electromagnetic signal and the seismic signal to determine at least one property associated with the subsurface earth formation.