Patent ID: 8305845

Claim:
A system for use in seismic signal detection, comprising: at least one electrically levitated seismic sensor, comprising: a housing; at least one magnet for creating a magnetic field mounted within the housing; and a moving coil within the housing structured and arranged so as to be fixed in a radial direction relative to the housing and movable in an axial direction thereof; an electrical circuit configured or designed for providing an electrical signal to the seismic sensor; a digital signal processor in communication with the seismic sensor; and a set of instructions executable by the processor that, when executed: applies the electrical signal to the seismic sensor such that when the moving coil is levitated against gravitational force so as to be located at a central position relative to the magnetic field in the seismic sensor; wherein the system is configured or designed to continuously monitor DC resistance of the moving coil of the seismic sensor while detecting seismic signals to derive a seismic sensor temperature, and to compensate sensor parameters based on variations in the seismic sensor temperature.