A new mode of radio wave diffraction via the terrestrial surface plasmon on mountain range

Abstract

It is shown that a new mode of radio wave diffraction occurs at the peak of mountains mediated via the terrestrial surface plasmon. If mobile electrical charges exist on the Earth's surface, the electromagnetic theory predicts strong coupling between the radio wave and the surface plasmon on the ground. If sufficient amount of electrical charges of the same sign appear on the ground as a consequence of some underground preseismic activity, they will be subject to the electrical repulsive forces. The surface electrical charges will then move toward topographic highs of nearby mountain peaks. Radio waves are then shown to interact with such electrical charges and create collective oscillations of the surface charges to induce a surface plasmon. Here it is clarified with numerical analyses on a massively parallel supercomputer that such interactions occur on the peak of mountains, hence causing peculiar phenomena of random diffraction. Depending on the density of the electrical charges on the ground surface, the interaction becomes strong enough to cause intense and random scattering and diffraction of the radio wave from the rough surface of the mountain topography. Mountain peaks thus act as a secondary source of radio waves; unexpectedly, radio waves are reradiated from the peaks into various directions by the anomalous diffraction and scattering, and the reradiated wave can propagate beyond the line of sight over mountains to reach distant locations. Such effects may arise randomly but concurrently with some preseismic activity in the crustal rocks, of which observation may allow statistical analysis of the critical state of crustal rocks over a broad area of a few hundred kilometers.

On Electromagnetic Turbulence

“…where A(r, t)) = A(r)e iωt , and J ⊥m,e (r ) represent the transversal (electric and magnetic) current densities. It points out the action of scalar and vectorial waves on diffraction effects when an electromagnetic wave interacts with a surface layer of a material [21] (surface plasmons) or plasma, and to the possibility to control diffraction, aiming, for example, to enhance its intensity through gratings, or stealth technology, utilizing an appropriate combination of material properties and the light wave incident on its surface. Radiating EM waves are feed only by the transverse part of the current density, the source of the vector potential.…”

Detection of Electromagnetic Precursors of Earthquakes Mediated by the Terrestrial Ground Surface Plasma Wave

“…On the other hand, the mechanism of anomalous radiowave propagation has been explained reasonably by the theory of ground surface plasma waves appearing on the surface of the earth [5,6]. It has been experimentally shown that positive charge carriers come out from the peroxy bond in oxidized minerals when rocks are subjected to tectonic deviatoric stresses [7].…”

“…Here, we assume that a sufficient amount of charge carriers exist on the earth's surface, then an oscillation of the surface charge carriers is induced by a radiowave over the ground surface [6], referred to as a terrestrial ground surface plasmon. Such interaction causes strong scattering and diffraction of the radiowave, which could be observed at distant locations as the precursors of earthquakes.…”

Radioplasmonics: design of plasmonic milli-particles in air and absorbing media for antenna communication and human-body in-vivo applications.

“…In this paper, the concept of Radioplasmonics is focused on scattering phenomena in RF in addition to absorption to develop new applications. A novel Plasmonic concept is shown in macroscale with particle dimensions less than a few millimeters or centimeters [48], where it would be easy to carry out experiments to study complex plasmonic phenomena as, for instance, multiple particle coupling [21]. This work naturally includes previous efforts to define plasmonics in extremely low-energies [27,[48][49][50][51][52].…”