Land seismic sensor for measuring a pressure wavefield

Abstract

A seismic sensor unit includes a sensor housing including an inner chamber and a receiver extension for ground coupling, a suspension fluid disposed in the inner chamber, and a hydrophone suspended in the suspension fluid. The seismic sensor unit may include a sensor housing including a steel spike coupled to the ground, a fluid chamber in the sensor housing, a fluid in the fluid chamber, and a hydrophone disposed in the fluid chamber and contacting the fluid such as to detect a pressure wavefield in the fluid caused by ground motion acting on the steel spike. A method includes receiving ground motion at a seismic sensor unit coupled to the ground, transmitting the ground motion to a fluid chamber, creating a pressure wavefield in a fluid in the fluid chamber in response to the ground motion, and detecting the pressure wavefield in the fluid using a hydrophone.

Dependencies are inferred from the claim text.