Seismic interface waves generated by seabed impacts are believed to have biological importance. Various wave types are of interest to seismologists, who can minimize the unwanted, but often dominant, ground roll waves with suitable instrumentation. Waves made by dredging and piling have been measured using geophones and found to be of this interface type, which propagate much more slowly than t...

In this study, a three-dimensional (3D) model is adopted to investigate the problem of fluid-seabed-structure interactions (FSSI) around offshore detached breakwaters. The Volume-Averaged Reynolds-Averaged Navier-Stokes (VARANS) equations are used simulate 3D fluid motion in vicinity breakwaters, including reflected, diffracted waves and non-linear turbulence. partially dynamic Biot’s (i.e., u−...

Testing various models and mechanisms of high frequency seabed scattering was one of primary goals of recent major experiments in sediment acoustics, SAX99 and SAX04, conducted near Ft. Walton Beach, Florida [1-4]. The models to test were based on various assumptions about dominance of certain scattering mechanisms and corresponding theories of scattering. Such models, confirmed by experiments,...

A series of wave flume tests have been performed in this paper to investigate the responses clayey sloping seabed under actions, including characteristics shoaling, topography and excess pore pressure. Different heights H, water depths D two slope angles β (4° 10°) were adopted their effects analyzed. It is found that obvious shoaling appears during process propagation along seabed. There are p...

To investigate the wave- and current-induced seabed response near a fully buried subsea pipeline, two-dimensional coupled model for fluid-seabed-pipeline interaction (FSPI-2D) is developed within framework of COMSOL multiphysics. Different from previous studies, both wave-current nonlinear pipeline-soil contacts are considered in present model. In this paper, Biot’s consolidation mode used to g...

We report evidences of active seabed doming and gas discharge few kilometers offshore from the Naples harbor (Italy). Pockmarks, mounds, and craters characterize the seabed. These morphologies represent the top of shallow crustal structures including pagodas, faults and folds affecting the present-day seabed. They record upraise, pressurization, and release of He and CO2 from mantle melts and d...

Deep waters (c. 4200m) around the Crozet Islands have localised and isolated seabed communities on sediments lying beneath highly productive waters to the north and east of the Islands. The restricted areas of primary productivity are stimulated by natural iron fertilization from the volcanic islands, in an otherwise low productivity HNLC (High Nutrient Low Chlorophyll) region, characteristic o...