The eruption of the Hunga Tonga-Hunga Ha'apai Volcano in January 2022 southwest Pacific islands Tonga triggered a tsunami that was detected beyond basin. Here we show its spatiotemporal signature as revealed by hundreds publicly available coastal tide gauge records from around world. characterized uniformly small leading wave arrived earlier than theoretically expected for freely propagating aw...

A generalization of the Woodward's theorem is applied to the case of random signals jointly modulated in amplitude and frequency. This yields the signal spectrum and a rather robust estimate of the bispectrum. Furthermore, higher order statistics that quantify the amount of energy in the signal due to nonlinearities, e.g., wave–wave interaction in the case of water waves, can be inferred. Consi...

The breaking of wind-generated waves plays a significant role in the exchanges of momentum, heat, water vapour, and gas between the atmosphere and the ocean. Breaking waves entrain air into the surface water forming bubbles, which manifests itself as a whitecap on the ocean surface. Whitecap measurements in the open ocean are sparse and are limited to Monahan and Muircheartaigh, (1980), the war...

Steam Laser Cleaning with a pulsed infrared laser source is investigated. The infrared light is tuned to the absorption maximum of water (λ= 2.94 μm, 10 ns), whereas the substrates used are transparent (glass, silicon). Thus a thin liquid water layer condensed on top of the contaminated substrate is rapidly heated. The pressure generated during the subsequent phase explosion generates a cleanin...

The fact that water is the most important factor of life on earth is not a new concept. Alteration and reduction in the amount of precipitation, population explosion and contamination of underground water pressurize governments severely to find solution for water resources. The air moisture is one of fresh water resources which has not been noticed and well exploited. In this study proper place...

The conversion between seismic and electromagnetic energies was discovered in a fluidfilled porous formation. When seismic waves propagate through a fluid-saturated porous formation, relative motion between the pore fluid and the solid matrix is generated and cation motion in the fluid is formed. The streaming electric current induces electromagnetic waves in the formation. There is an opposite...

The invention as disclosed is a system for real time detection of tsunami waves. A tsunami is considered a "shallow water wave"; having a large wavelength compared to the ocean depth. A tsunami can have wavelengths ranging from 100 to 500 km, and amplitudes up to 60 cm (i.e., a pressure signal of up to 1 psi). At least one telecommunications grade optical fiber cable fitted with repeaters spann...

A space-time discontinuous Galerkin (DG) finite element method for nonlinear water waves in an inviscid and incompressible fluid is presented. The space-time DG method results in a conservative numerical discretization on time dependent deforming meshes which follow the free surface evolution. The dispersion and dissipation errors of the scheme are investigated and the algorithm is demonstrated...