Oceanic microseisms are generated by the interaction of opposing ocean waves and subsequent coupling with the seabed, so microseisms should contain information on the ocean conditions that generated them. This leads to the possibility of using seismic records as a proxy for the ocean gravity wavefield. Here we investigate the P-wave component of microseisms, which has previously been linked to ...

We use the Earth Simulator to model seismic wave propagation resulting from large earthquakes on a global scale. Simulations are conducted based upon the spectral-element method, a high-degree finiteelement technique. We include the full complexity of the Earth, i.e., a three-dimensional seismic wave velocity and density structure, a 3-D crustal model, the elliptical figure of the Earth as well...

Measuring the electrical field induced by a borehole Stoneley wave is a new method for characterizing a rock formation around a borehole. Our field measurements demonstrate that the Stoneley-wave-induced electrical field can be detected in sedimentary rocks (dolomite in our experiment), and that the amplitude of this electroseismic phenomenon can be used to detect isolated fractures and permeab...

a r t i c l e i n f o Keywords: P-wave microseism travel-time anomaly body-wave tomography storm Array analysis of seismic noise has the potential to be very useful in improving body-wave tomography of Earth structure, just as noise cross-correlation methods have recently proven successful in surface-wave tomography. Beamforming of seismic noise recorded in southern California reveals P-wave ar...

In this paper we use methods from partial differential equations, in particular microlocal analysis and theory of Fourier integral operators, to study seismic imaging in the wave-equation approach. Seismic data are commonly modeled by a high-frequency single scattering approximation. This amounts to a linearization in the medium coefficient about a smooth background. The discontinuities are con...

The purpose of this work is to present and analyze the results of numerical simulations related to the application of three different mathematical models in the acoustic seismic wave propagation in which only compressional waves (P-waves) are contemplated. And present the results of an investigation about how these wave equation implementations can influence the amplitudes of a migrated section...

Tomograms of the upper mantle, which represent perturbations in P-wave, shear wave speed, and bulk-sound speed, image the Indo-Australian plate subducting beneath the Eurasian plate along the Sumatra–Andaman arc. The detailed images of the subducting slab are well constrained by the large number of intermediate depth earthquakes and moderate seismic station coverage along the entire Indonesian–...

[1] We present a high resolution 3 dimensional (3D) P wave velocity model for Tenerife Island, Canaries, covering the top of Teide volcano (3,718 m a.s.l.) down to around 8 km below sea level (b.s.l). The tomographic inversion is based on a large data set of travel times obtained from a 3D active seismic experiment using offshore shots (air guns) recorded at more than 100 onshore seismic statio...