26 citations · 51 across the 5 of their papers we have counts for
4 papers · 1 filter
Adjoint-based inversion for stress and frictional parameters in earthquake modeling
Vidar Stiernström, Martin Almquist, Eric M. Dunham
We present an adjoint-based optimization method to invert for stress and frictional parameters used in earthquake modeling. The forward problem is linear elastodynamics with nonlin…
Approximating moving point sources in hyperbolic partial differential equations
Ylva Ljungberg Rydin, Martin Almquist
We consider point sources in hyperbolic equations discretized by finite differences. If the source is stationary, appropriate source discretization has been shown to preserve the a…
Elastic wave propagation in anisotropic solids using energy-stable finite differences with weakly enforced boundary and interface conditions
Martin Almquist, Eric M. Dunham
Summation-by-parts (SBP) finite difference methods have several desirable properties for second-order wave equations. They combine the computational efficiency of narrow-stencil fi…
Order Preserving Interpolation for Summation-by-Parts Operators at Non-Conforming Grid Interfaces
Martin Almquist, Siyang Wang, Jonatan Werpers
We study non-conforming grid interfaces for summation-by-parts finite difference methods applied to partial differential equations with second derivatives in space. To maintain ene…