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Locating seismic scatterers at the base of the mantle beneath eastern Tibet with PKIKP precursors |
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| Authors: | XuZhang Shen HuiLan Zhou |
| Institution: | 1 Laboratory of Computational Geodynamics, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; 2 Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China; 3 Lanzhou Base of Institute of Earthquake Prediction, China Earthquake Administration, Lanzhou 730000, China |
| Abstract: | Clear PKIKP precursors were observed from the Lanzhou CTBTO seismic array.We measured their incident angles,arriving azimuths and differential travel times with respect to the PKIKP arrivals using array analysis techniques.These measurements allowed us to locate the scatterers that generated the observed precursors.We found that the scatterers are located in the lowermost mantle beneath eastern Tibet,which is featured by a high-velocity anomaly based on previous tomographic studies.The high velocity anomaly... |
| Keywords: | PKIKP precursors scatterers base of the mantle Lanzhou CTBTO seismic array Ancient Tethys |
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