In this paper, a two-parameter discrete Gaussian beam summation is described and then applied to SH seismic waves in a layer over a half space. For this case the exact solution for the wide-angle reflection and head wave is known by the summation of plane waves or from the modified-Cagniard method. Using Gaussian beam summations over a single angle parameter, the wide-angle reflection and head ...

On 24 May 2013, the largest ever-recorded deep earthquake occurred beneath Sea of Okhotsk. A multiple point source inversion procedure is applied to constrain source process of this earthquake, based on waveform modeling of both direct P and SH waves and near-surface reflected pP and sSH waves. Our results indicate that the earthquake consists of six major subevents separated in space and time,...

This paper presents characteristics of quasi-twoday waves (QTDWs) in the mesosphere and lower thermosphere (MLT) between 52 S and 52 N from 2002 to 2011 using TIMED/SABER temperature data. Spectral analysis suggests that dominant QTDW components at mid-high latitudes of the Southern Hemisphere (SH) and the Northern Hemisphere (NH) are (2.13, W3) and (2.04, W4), respectively. The most remarkable...

This paper evaluates the benefits of using ultrasonic guided waves for mapping a structure, when implemented on mobile magnetic robotic platform. It considers specific problem geometric features waves, which enables localisation edges and/or welded joints. Shear Horizontal (SH) generated by Electro-Magnetic Acoustic Transducers (EMATs) are used steel samples with nominal thickness 10 mm. A Baye...

Abstract We address the dynamics of two-dimensional (2D) truncated Airy waves (TAWs) and three-component solitons in system two fundamental-frequency (FF) second-harmonic (SH) fields, coupled by quadratic ( χ ( 2</mm...