Nonlinear waveform and delay time analysis of triplicated core phases

摘要: [1] We introduce a new method to measure differential travel times and attenuation of seismic body waves. The problem is formulated as nonlinear inverse problem, which solved by simulated annealing. Using this technique, we have analyzed triplicated PKP waves recorded the temporary Eifel array in central Europe. These examples demonstrate potential able determine waveforms core phases, even when they interfere on seismograms or additional depth phases are present. reveal presence large-amplitude small-scale heterogeneities along PKP(AB) ray paths favor local radial inner model with ∼0.9% velocity perturbation its top 150 km small perturbations below. quality factor 300 region estimated from attenuation. Its preferred value 330 lower bound 75.