We have developed a simplified calibration method that enables anyone to accurately calibrate an Electro-mechanical seismic station with speed, portability and low-cost. Current calibration methods generally require either expensive laboratory based equipment, or significant time and expertise. We have developed a simplified calibration method that uses an affordable industrial laser position sensor to optically track mass motion as a means of determining seismometer response. By comparing the derivative of mass displacement to seismometer coil voltage, we can determine sensitivity at any frequency within the instrument passband. The method results in the calculation of sensitivity and Poles & Zeros to within five percent. We compare the Mass Displacement Tracking (MDT) calibration method against the standard laboratory vibration table calibration, as well as the against the co-location calibration method to find that it produces equivalent results.
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