Lg-wave attenuation in the Australian crust

Characteristics of Lg attenuation in the Tibetan Plateau

[1] Lg, a regional seismic wave comprised of multiple shear wave reverberations trapped in the crustal waveguide, is important for magnitude estimation and source discrimination for monitoring nuclear testing treaties. In stable continental regions, Lg propagates with a group velocity of about 3.5 km/s and can often be observed at distances up to 4000 km. To better understand the absence of hig...

Frequency dependence of seismic wave attenuation in the upper mantle beneath the Australian region

S U M M A R Y The differential attenuation for upper-mantle paths beneath northern Australia has been estimated using spectral ratio methods, both in a narrow frequency band near 0.6 Hz to obtain stable estimates for subsequent inversion and also over a broad frequency band up to 3–6 Hz to look at the frequency dependence of attenuation. The frequency dependence of the differential attenuation ...

seismic wave anisotropy in the upper crust of the bam area in the south-central iran

the seismic anisotropy is a subject of interest for seismologists and geologists. the information of seismic anisotropy has significant role in geology interpretations (savage, 1999). in this study, we have investigated the upper crust anisotropy in bam area by means of shear wave splitting sg phase. we have selected more than three hundred aftershocks from iiees local temporary seismic network...

Shear-wave Splitting in a Critical Crust: the next Step

On pourrait avancer que l'anisotropie dans la biréfringence des ondes transversales n'a pas répondu à ses promesses initiales, à savoir ouvrir une nouvelle voie dans la compréhension des phénomènes de fissures et de contraintes dans la croûte terrestre. Dans cet article sont présentés deux développements révélés récemment, qui paraissent raviver ces premiers espoirs et apportent des opportunité...

Seismic Wave Attenuation in Carbonates