Silicon Audio’s optical seismometer is an ideal point receiver for land seismic applications. The seismic sensor has a flat response from 0.005Hz to 1kHz (specific range depends upon the application), low cross-axis sensitivity, and low power – making it ideal for nodal applications. With the noise performance and frequency range of a scientific-grade instrument, our seismometer is substantially more robust than any scientific-grade sensor. The sensor therefore offers the unique combination of instrumentation-like features and performance with a robustness suitable for land seismic surveys.
The optical seismometer has the form factor of conventional geophones, similar in size and weight. Shock-tested to withstand the demands of deployment, our sensor’s tolerance is in fact consistent with conventional geophones.
Silicon Audio offers configuration flexibility to meet the requirements of a given land application. As depicted here, the seismometer is ideal for certain downhole sensing applications because of the sensor’s high tilt tolerance and small cross section (2” diameter XYZ in-line package). Its high sensor-to-sensor sensitivity matching enables true acceleration vector measurements.
Low-noise, low-frequency performance makes Silicon Audio’s sensor ideal for passive seismic applications such as frack monitoring. Here again, the small cross section of the sensor supports cost-effective deployment into small diameter boreholes. Noise performance has been verified in tests performed at the Albuquerque Seismological Laboratory, part of the U.S. Geological Survey. Our sensors have been used to record distant seismic events originating from the other side of the world, as well as the earth’s natural background noise including the 5-second period microseism.
OPTICAL SEISMOMETER CAPTURE OF EARTH NOISE
MAGNITUDE 7.2 EARTHQUAKE IN MEXICO RECORDED IN AUSTIN, TX, APRIL 2014