Three-dimensional sensitivity kernels for finite-frequency traveltimes: the banana-doughnut paradox
نویسندگان
چکیده
منابع مشابه
Seismic tomography, adjoint methods, time reversal, and banana-doughnut kernels
S U M M A R Y We draw connections between seismic tomography, adjoint methods popular in climate and ocean dynamics, time-reversal imaging and finite-frequency ‘banana-doughnut’ kernels. We demonstrate that Fréchet derivatives for tomographic and (finite) source inversions may be obtained based upon just two numerical simulations for each earthquake: one calculation for the current model and a ...
متن کاملFinite-frequency sensitivity kernels for head waves
S U M M A R Y Head waves are extremely important in determining the structure of the predominantly layered Earth. While several recent studies have shown the diffractive nature and the 3-D Fréchet kernels of finite-frequency turning waves, analogues of head waves in a continuous velocity structure, the finite-frequency effects and sensitivity kernels of head waves are yet to be carefully examin...
متن کاملSensitivity kernels for finite-frequency surface waves
S U M M A R Y Sensitivity kernels for fundamental mode surface waves at finite frequency for 2-D phase speed and 3-D shear wave speed are constructed based on the Born and Rytov approximations working with a potential representation for surface waves. The use of asymptotic Green’s functions for scalar wave equations provides an efficient way to calculate the Born or Rytov kernels. The 2-D sensi...
متن کاملEmpirically determined finite frequency sensitivity kernels for surface waves
S U M M A R Y We demonstrate a method for the empirical construction of 2-D surface wave phase traveltime finite frequency sensitivity kernels by using phase traveltime measurements obtained across a large dense seismic array. The method exploits the virtual source and reciprocity properties of the ambient noise cross-correlation method. The adjoint method is used to construct the sensitivity k...
متن کاملThree-dimensional empirical traveltimes: construction and applications
T. Nicholson,1,∗ M. Sambridge2 and Ó. Gudmundsson3 1Research School of Earth Sciences, Australian National University, Canberra ACT 0200, Australia. E-mail: [email protected] 2Center for Advanced Data Inference, Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia. E-mail: [email protected] 3Danish Lithospheric Centre, Øster Voldgade 10, 1350...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1999
ISSN: 0956-540X,1365-246X
DOI: 10.1046/j.1365-246x.1999.00837.x