The piezomagnetic effect: Limits on detectability using a combined vector and scalar magnetometer array

The combined data from two types of magnetic observatories were used to determine the operational characteristics of the magnetometers in the remote observatory environment. The initial run of the magnetometers demonstrated that in addition to the normal magnetic variation associated with the disturbance of the magnetosphere there is also a component of the magnetic records associated with oceanic tides. Other factors contribution to the residual variation in the magnetic difference fields are local differnces in susceptibility, conductivity, and magnetic field orientation. These effects can be removed by linear prediction filtering techniques with vector field information as the input. The primary conclusion was that the instrumental noise level for both the proton precession and the vector fluxgate magnetometers are needed.