magnetismo terrestre


A cold dusk is setting in in Moscow as we pre-flight the aircraft for our non-stop flight to Los Angeles. Slowly thawing our frosty aircraft back life on the ramp, we have more than just the usual transatlantic flight preparations to go over. Our objective today is a little different… The shortest path, and our planned routing, between sub-zero Moscow and mild LA is (as the picture above illustrates) to fly ‘over the top’. I.e. fly at or near to the north pole.

Whilst these routes are profitable and becoming more widely used, flying near to the poles or within areas of ‘magnetic unreliability’ is not without its hazards. Perhaps most obvious to the layman, are the deadly freezing temperatures on

Seguir leyendo

Bathymetric Surveys: Improvements and Barriers

Developments and Points for Improvement

Since the 1970s, remote sensing has increasingly been used to conduct underwater surveys. Several methodologies are employed in hydrographic surveying, from direct techniques such as probing rods to more sophisticated techniques such as satellite-derived bathymetry and altimetric radar. The growing need for data that is increasingly accurate and available with a quick turnaround has recently led to a worldwide effort to develop sensors and alternative techniques for measuring depth.

Bathymetric survey platforms include surface vessels, submersible platforms, aircraft and satellites (see Figure 1). Vessels range from large ships, used in offshore surveys, to uncrewed vessels, either remotely controlled or autonomous. The most commonly used submersible platforms are autonomous underwater vehicles (AUVs) and remotely

Seguir leyendo

Top Five: Weird Ocean Phenomena






The ocean may conjure images of beautiful waves, shipwrecks, and marine life. But strange things happen in the ocean as a result of weather and currents. The five events described below are just a few of them.

1. St. Elmo's Fire


St. Elmo's Fire is a colorful discharge of atmospheric electricity that typically occurs during a thunderstorm. When a sharp object (such as a ship’s mast) comes in contact with an extraordinarily high electrical field and a large number of electrons, the electrons can glow in various colors, like a neon sign, resulting in this rare phenomenon. “St. Elmo” is a derivation of St. Erasmus of Formia, one of the two patron saints of sailors.


Photo Credit: Senior Airman Brian Kelly, U.S. Air Force

2. Fog “Tsunami”



Seguir leyendo

La anguila: el animal más misterioso podría extinguirse antes de que logremos entenderlo

Publicado: 20 noviembre 2022 19:46 CET

Hay pocos animales que despierten una fascinación semejante a la de la anguila (Anguilla anguilla). Ese pez con cuerpo de serpiente, cubierto de una resbaladiza baba y con una sorprendentemente agilidad, casi imposible de asir, que

Seguir leyendo