 F. Waldhauser

F. Waldhauser co-developed double-difference earthquake relocation with W. Ellsworth. The method combines ordinary arrival-time data with precise waveform-based differential measurements, then adjusts relative source positions to fit those differences.^[ref]

Closely related waveforms provide useful timing information through cross-correlation. Combining those observations with a network of stations can reveal structure within a seismic cluster that a collection of independently located events would blur.