- Geophysical inverse theory: The inverse problem of
	    electromagnetic induction; Application of optimization theory
	    for making sound inferences in inverse problems.
	    
-  Geomagnetism: modeling the main geomagnetic field;
	    Downward continuation of the main field to the core;
	    Statistical characterization of the crustal field with Lowes
	    spectrum. 
-  Application of time series analysis to potential fields:
	    Use of cross spectra in analysis of vector field data from
	    aircraft and satellites; Application of cross spectra and
	    coherence estimates in marine magnetism; Spectral methods for
	    interpolation.
           Some pages from the IGPP Annual Reports:
           
           2011,
           
2010,
           
2009,
           
2008,
           
2007