Thursday, 23 November, 2017

Nasa probe finds bubble created by human activity enveloping Earth

Nasa probe finds bubble created by human activity enveloping Earth Nasa probe finds bubble created by human activity enveloping Earth
Mike Hodges | 20 May, 2017, 09:50

The same study detailing the VLF findings also explains that nuclear tests performed by the USA and Soviet Union during the late 1950s to early 1960s actually altered space weather - charged particles and forms of radiation around Earth that can affect our environment. But the energy from nuclear explosions created hot, electrically charged regions within the atmosphere that induced geomagnetic disturbances, and even produced radiation belts of its own.

Bonus finding from the paper: Some types of radio waves act to create a kind of shield around the Earth that protects us from harmful radiation. This data can help bolster NASA's endeavors to shield satellites and space travelers from the characteristic radiation inborn in space.

Between 1958 and 1962, the United States and USSR conducted high-altitude nuclear explosion tests, detonating weapons as high as 250 miles above the surface.

Space weather, a phenomenon in which radiation and high-energy particles from the sun constantly interact with the geomagnetic field of the Earth.

So far, it was believed that humans have a capability of changing only the Earth's landscape, but with the new revaltion, it looks like we can shape up the near-space environment too.

The space weather effects mentioned by Erickson are usually caused by the sun when it emits a huge burst of solar plasma in Earth's direction. When enough of these high energy particles rain down on the magnetosphere, it can severely damage communications satellites and even electrical power grids on the ground. The tests, and another human-initiated space climate, are the concentration of an exhaustive new review distributed in Space Science Reviews.

With further study, VLF transmissions may serve as a way to remove excess radiation from the near-Earth environment. The study also examines other anthropogenic impacts on space weather. The artificially trapped charged particles remained in significant numbers for weeks, and in one case, years. Today, it is used largely in communicating with submarines, but the signals find their way into space as well. The Teak test, which took place on August 1, 1958, was notable for the artificial aurora that resulted. The vivacious particles discharged by the test likely took after Earth's magnetic field lines to the Polynesian island country, initiating the aurora.

The tests caused geomagnetic storms detected from Sweden all the way to Arizona, with two high-speed waves of particles traveling at the speed of 1,860 miles per second and nearly 500 miles per second.

Depending on solar activity, the radiation belts (also called van Allen belts) can change their sizes. Now scientists at NASA have discovered that we have also been shaping our near-space environments with radio signals.

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