About McMaC
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Mid-continent Magnetoseismic Chain (McMAC) is a National Science Foundation (NSF) project that conducts research in magnetospheric sounding using ground magnetic field observations.

We refer the methodology used in this research as "magneto-seismology", reflecting its similarity to terrestrial seismology and helioseismology.

The magnetoseismic research consists of two parts: the normal mode analysis that deduces the plasma density along a field line from its resonant frequencies, and the travel-time analysis that infers the density distribution in an extended region by timing the arrival of impulsive signals at multiple locations.

To achieve the research objectives, McMAC establishes nine new magnetometer stations in the United States and Mexico to detect the magnetic field oscillations in the magnetosphere.  The Stations Page shows the map and the coordinates of the McMAC stations.