Comprehensive field models show the difference in the Earth's magnetic field between AD 2000 (Oersted epoch) and AD 1980 (Magsat epoch) (left) and ionospheric currents over time (right). (Sabaka et al., Geophys.J Int., 2002)
Crustal anomaly studies include a global magnetization model (M. Purucker) and a regional magnetization model for the Kursk iron-ore region (P. Taylor) (above, bottom), a susceptibility model for the Antarctic (HR Kim, below, top) and for the region of the recent Sumatra earthquake (M. Purucker, above, top). Estimates for high heat flow based on a magnetic model correlate well with regions of known volcanism and ice streams in Antarctica (below, bottom, M. Purucker, Science).
Flight mission support includes in-flight calibration of the SAC-C vector magnetometer (left) and simulation studies for the future SWARM mission (right), using the Comprehensive Model (T. Sabaka and M. Purucker).