The Gassmann–Burgers Model to Simulate Seismic Waves at the Earth Crust And Mantle

Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities

“…Carcione et al (2014) presented an algorithm to simulate full seismic wave propagation in heterogeneous media in the presence of the BDT, using the Burgers mechanical model and the Arrhenius equation to take into account viscoelastic behavior, temperature dependence, and rock melting conditions. Carcione et al (2016) extended the theory to include poro-viscoelastic media by explicitly modeling the effects of fluids under supercritical conditions. Farina et al (2016) applied this algorithm to simulate full waveforms, demonstrating that discontinuities associated with the transition to supercritical conditions and the presence of magmas can be seismically observable.…”

Temporal Variations in QP−1 ${Q}_{P}^{-1}$ and QS−1 ${Q}_{S}^{-1}$ Above a Megathrust Following Episodic Slow‐Slip Events

“…The P‐wave attenuation ($${Q}_{P}^{-1}$$) to S‐wave attenuation ($${Q}_{S}^{-1}$$) ratio ($${Q}_{P}^{-1}/{Q}_{S}^{-1}$$) provides important information about the dominant attenuation mechanism owing to the different propagation characteristics of the two seismic waves (e.g., Hauksson & Shearer, 2006; Stachnik et al., 2004). The motion associated with grain‐boundary sliding is mainly enhanced by shear deformation, such that attenuation dominated by these mechanisms should yield $${Q}_{P}^{-1}/{Q}_{S}^{-1}$$ < 1.0 (e.g., Carcione et al., 2017, 2018; Jackson, 2015; Jackson et al., 2002). However, we often observe $${Q}_{P}^{-1}/{Q}_{S}^{-1}$$ > 1.0, which cannot be explained by these intergranular mechanisms.…”