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Jeanne L. Hardebeck coauthored a focal mechanism method that propagates uncertainty in first-motion polarity, source position and seismic structure. Synthetic tests and closely spaced earthquake groups provide checks on the inferred solutions.^[ref]

The method matters for stress studies because a sharply fitted mechanism can still change substantially when an assumed ray path changes.

Authors: Jeanne L. Hardebeck, Andrew J. Michael.

Journal of Geophysical Research 109, B11303. Tests stress-orientation evidence for strong and weak fault models, discussing limits of frictional heating and borehole observations.