Interacting ocean surface waves force water column pressure fluctuations with spectral peaks at the same frequencies of primary microseisms (PM), double-frequency microseisms (DF), and seismic hum. Prior treatment of nonlinear ocean wave interactions has focused on the DF pressure fluctuations which, in the presence of opposing waves, do not decay with depth and hence are dominant in deep water...

In recent years, high-altitude infrasound sensing has become more prolific, demonstrating an enormous value especially when utilized over regions inaccessible to traditional ground-based sensing. Similar detectors, airborne sensors take advantage of the fact that impulsive atmospheric events such as explosions can generate low frequency acoustic waves, also known infrasound. Due negligible atte...

Waves occur in many aspects of our daily lives and in the nature which surrounds us. Just take a stone and throw it into a resting water surface: you will observe a surface wave, spreading in concentric circles around the impact point on the water. Or think of the high breaking waves in the ocean which are so highly desirable for surf champions. Less pleasantly, there are the energy waves gener...

The time-dependent motion of water waves with a parametrically-defined free surface is mapped to a fixed time-independent rectangle by an arbitrary transformation. The emphasis is on the general properties of transformations. Special cases are algebraic transformations based on transfinite interpolation, conformal mappings, and transformations generated by nonlinear elliptic PDEs. The aim is to...

Concurrent generation and mixing phenomenon of thermoacoustic (TA) and magnetoacoustic (MA) waves in water are predicted and observed. A theory unifying TA and MA is further put forward to analyze it. By scaling down the radio frequency in thermoacoustics to the low mega Hertz range and by incorporating appropriately a static magnetic field, TA and MA waves are simultaneously generated in the c...

In a severe accident, molten corium may penetrate the reactor pressure vessel and enter cooling water in cavity, then steam explosion occur. Steam explosions can initiate waves threaten structural integrity of cavity. To investigate propagation characteristics waves, including pattern, attenuation, amplification under TNT detonation, coupled numerical approach combined with arbitrary Lagrangian...