Combining seismic data from sensors to attenuate noise

A system comprising:

• a controller having a processor to receive data collected by sensor assemblies deployed at a ground surface, where each of the sensor assemblies has a seismic sensor to measure seismic waves reflected from a subterranean structure, and a divergence sensor, wherein the divergence sensor includes a container containing a material and a pressure sensor immersed in the material, and the divergence sensor is insensitive to a direction of wave propagation, and wherein the sensor assembly including the divergence sensor is connected with the ground so that the divergence sensor senses pressure fluctuations in the material resulting at least partially from ground roll;
• wherein the processor is configured to combine first data representing the reflected seismic waves from the seismic sensors with second data representing the pressure fluctuations from the divergence sensors to attenuate ground-roll noise in the first data from the seismic sensors, the first data representing measurements along one or more axes, and the second data comprising measurements insensitive to a direction of wave propagation.

An article comprising at least one non-transitory computer-readable storage medium containing instructions that upon execution cause a system having a processor to:

• receive data collected by sensor assemblies arranged at a ground surface, where each of the sensor assemblies has a seismic sensor to measure seismic waves reflected from a subterranean structure, and a divergence sensor, wherein the divergence sensor includes a container containing a material and a pressure sensor immersed in the material, and the divergence sensor is insensitive to a direction of wave propagation, and wherein a portion of the sensor assembly including the divergence sensor is connected with the ground so that the divergence sensor senses pressure fluctuations resulting at least partially from ground roll;
• and
• combine first data representing the reflected seismic waves from the seismic sensors with second data representing the pressure fluctuations from the divergence sensors to attenuate ground-roll noise in the first data from the seismic sensors, the first data representing measurements along one or more axes, and the second data comprising measurements insensitive to a direction of wave propagation.