According to Daniel Baker, director of the Laboratory for Atmospheric and Space Physics, the electron barrier exists in the Van Allen belts, a pair of donut-shaped belts that ring the Earth teeming with protons and electrons.
The Earth’s magnetic field holds the belts in place, but the scientist says that the electrons in these belts – which travel at nearly the speed of light – are being blocked by some invisible force that reminded him of the kind of shields used in television series like Star Trek to stop alien energy weapons from vaporizing starships.
This newly found force field appears to be unrelated to the clouds of cold plasma that were discovered over earth in 2012, as mentioned by National Geographic.
Many have speculated that there have been no landings on the moon due to a combination of this quarantine along with the radiation found in the Van Allen Belt.
Numerous philosophers and spiritual teachers have spoken about the quarantine.
Michael Tsarion talks about the quarantine and its association to the moon in the Stargate and Quarantine chapter of his book, Atlantis, Alien Visitation and Genetic Manipulation:
"When the original pursuers of the “Serpent Brotherhood” destroyed the planet Tiamat, they made ready to leave this solar system and return to their own. They had to leave in a hurry, so as not to be hindered by the cosmic forces which would be unleashed throughout the solar system. Because of their haste, they did not have time to precisely scan the planet Earth, and so they did not locate their enemies hidden deep within the caverns and beneath the seas of pre-diluvian Earth.
"The masters of the Nephilim were relatively convinced that even if their enemies were on Earth they could not survive the paroxysms and furor that Tiamat’s obliteration would bring on. However, these unknown pursuers did not just leave our solar system without instigating precautionary measures. Before they made the journey back to their own planet, they established an etheric barrier around our planet that would be along the same orbit trajectory as the Moon’s around the Earth.
"This barrier still exists and is utterly impenetrable to the Atlantean progeny, because the technology by which it was erected was of an extremely advanced level. From that time onwards, the Moon would come to represent (in almost all cultures) arcane powers of protection and magic.
"This apotropaic barrier, often referred to as by native peoples as the “the great web in the sky,” was put there obviously to prevent the Atlanteans from ever leaving this place. The Earth was to be their tomb."
According to the Wes Penre papers, our planet has been under quarantine since the arrival of the Anunnaki:
Earth's Quarantine Force Field Discovered by NASA?