Feng, JikunYao, HuajianPoli, PieroFang, LihuaWu, YanZhang, Ping2026-06-062026-06-060094-8276https://hdl.handle.net/1885/733809952Recent studies have demonstrated that body waves between pairs of stations can be successfully retrieved from ambient noise cross correlation at both regional and global scales, although surface waves are the dominant signals. However, it is still difficult to use these retrieved body wave signals to map lateral depth variations of main structural discontinuities or velocity contrasts because of its low signal-to-noise ratio (SNR). In this research, based on a dense seismic array in eastern North China Craton, reflected P wave signals from 410 km and 660 km discontinuities can be successfully recovered from ambient noise cross correlation. To improve SNR, the cross correlations are stacked within each bin with the phase-weighted stack method. The retrieved P410P and P660P phases from stacked correlations reveal lateral variations of both depths and sharpness of the 410 km and 660 km discontinuities along two profiles, which may be related with hot material upwelling and the effect of stagnant Pacific Plate in the transition zone beneath North China Craton. The imaging results are generally consistent with the results from teleseismic receiver functions, which demonstrate the possibility of mapping high-resolution topography and sharpness of deep internal discontinuities without earthquake-station geometric limitations.We appreciate the constructive com ments from two anonymous reviewers that greatly help to improve the original manuscript. The waveform data were provided by China Seismic Array Data Management Center at Institute of Geophysics, China Earthquake Administration. This research is funded by National Natural Science Foundation of China (41574034), which also supports Piero Poli’s visit to University of Science and Technology of China for this collaborative research.8en©2017 The authors410 km and 660 km discontinuitiesambient noise interferometrybody wave reflectionNorth China Craton2017-08-2810.1002/2017GL07426385028638735