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- W2990343886 abstract "Abstract The lateral Lg wave attenuation in western Tibet and surrounding regions is studied. A total of 706 Two-station method (TSM) and 533 Reverse two-station method (RTSM) pairs are generated from 282 regional earthquakes. The earthquakes are recorded at 48 seismic stations operated across western Kunlun and western Tibet regions. The Lg phases are extracted from the vertical component of seismograms with magnitude greater than 4.6 mb and focal depth less than 50 km to measure the TSM and RTSM Lg Q at 1 Hz (Q0). The LgQ0 tomography map is generated with grid-size 0.5∘ × 0.5∘ using the least-squares orthogonal factor decomposition (LSQR) algorithm. Lateral variation of Lg attenuation is found to exist across the region. The results provide new insights into the attenuation properties of the crust and its linkage with regional geodynamics. The low LgQ0 200 is revealed in the central part of Lhasa terrane in western Tibet from both TSM and RTSM images. The high LgQ0 values complemented with the high Pn velocities beneath the central part of Lhasa terrane reveal the trace of underthrusting Indian lithosphere beneath the western Tibet." @default.
- W2990343886 created "2019-12-05" @default.
- W2990343886 creator A5056568681 @default.
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- W2990343886 date "2020-01-01" @default.
- W2990343886 modified "2023-09-24" @default.
- W2990343886 title "Crustal structure of western Tibet revealed by Lg attenuation tomography" @default.
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- W2990343886 doi "https://doi.org/10.1016/j.tecto.2019.228245" @default.
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