Strong seismic scatterers near the core-mantle boundary north of the Pacific Anomaly

• Published in: Physics of the Earth and Planetary Interiors
• Main Authors: Ma, Xiaolong, Sun, Xinlei, Wiens, Douglas A., Wen, Lianxing, Nyblade, Andrew, Anandakrishnan, Sridhar, Aster, Rick, Huerta, Audrey, Wilson, Terry
• Format: Report
• Language: English
• Published: ELSEVIER SCIENCE BV 2016
• Subjects: Geochemistry & Geophysics; Seismic scatterers; PKP precursor; Subducted slabs; Lateral heterogeneities; Core-mantle boundary; SUBDUCTED OCEANIC-CRUST; DEEP EARTH DYNAMICS; LOW VELOCITY ZONES; LOWERMOST MANTLE; WAVE SCATTERING; PKP PRECURSORS; INNER-CORE; CHEMICAL HETEROGENEITY; ATTENUATION STRUCTURES; SYNTHETIC SEISMOGRAMS; Kamchatka Peninsula; Pacific; Antarc*; Antarctica; Kamchatka; Aleutian Islands
• Online Access: http://ir.gig.ac.cn/handle/344008/54963; https://doi.org/10.1016/j.pepi.2016.01.007

Tomographic images have shown that there are clear high-velocity heterogeneities to the north of the Pacific Anomaly near the core-mantle boundary (CMB), but the detailed structure and origin of these heterogeneities are poorly known. In this study, we analyze PKP precursors from earthquakes in the...