University:
Widener University
Course:
CHEM-255 | Organic Chemistry I
Academic year:

2023
Views:

239

Pages:

9
Author:

Avery Choi

12.570 - Structure and dynamics of the CMB region 1st order Earth structure • crust: 10’s km (A) • upper mantle: 25-410km (B) • transition zone: 410660km (C) • lower mantle: 6602891km (D’ and D’’) • outer core: 28915149.5km (E) • inner core: 5149.56371km (F) Preliminary Reference Earth Model - PREM a=13.71 km/s b= 7.26 km/s r= 5.56 g/cm3 CMB 2891 km a= 8.06 km/s b= 0.00 km/s r= 9.90 g/cm3 The Core Mantle Boundary region Lay et al., Nature, 392, 461-468, 1998. seismic probing of the CMB Æ normal modes Æ P and S waves H t CMB CMB seismic probing of the CMB Æ Pdif and Sdif waves H CMB t CMB seismic probing of the CMB Æ PcP, ScS and ScP waves t H CMB CMB seismic probing of the CMB Æ PKP, SKS waves H t CMB CMB seismic probing of the CMB Æ SPdKS waves H t CMB CMB D (°) seismic probing of the CMB time (s) Phase parameters: CMB parameters: • relative arrival time • relative amplitude • waveform distortion, including precursors and postcursors • seismic velocities • attenuation • seismic discontinuities (mapping and modeling) • anisotropy