Image:-earth's magnetic field
Our magnetic field has changed over the last few years. For example, we know that in recent years the northern magnet pole has changed at record speed. In a region from Africa to South America, researchers with Swarm satellites from the European Space Agency ( ESA) are now monitoring weakening in the Earth's magnetic field. It's called the "South Atlantic Anomaly." Watch the below video about weakened even more!!!
Scientists use a unit called nanoteslas to measure the strength or magnetic intensity of the Earth's magnetic field. In the South Atlantic region, the minimum magnetic intensity decreased from 24,000 to 22,000 Nanoteslas in an anomalous region between 1970 and 2020, according to a press statement from the ESA.
The weak magnetic field patch has also expanded to the West at a rate of approximately 12 miles per year. Recent measures taken in the last five years by Swarm satellites have shown that they can actually split into half.
In November 2013, the ESA started its Swarm satellite constellation. Ever since, the key secrets about the mysterious magnetic field of Earth have been revealed. Three identical, trapezoidal satellites form the constellation. Each 29-foot satellite is packed with Earth's magnetism measuring sensors.
There is an instrument that measures incident ions along the orbit of the spaceship and a boom of 13 feet that has a magnetometer for the vector field and three start trackers at the midway point. A scalar magnetometer is at the tip of the boom to ensure "magnetic cleanliness," which collects data without electric interference from the satellite's main section of the boom.
Jürgen Matzka, of the German Research Center for Geoscience, stated in a statement: "The New Eastern minimum of South Atlantic Anomaly has arisen over the past decade and has been developing intensively in recent years.
Earth's magnetic field is weakening over South America, creating a hazard zone for low-orbiting satellites. It's a sign of little-understood changes happening in our planet's core. https://t.co/zz6PDVbQmU pic.twitter.com/PPyx30LbfQ— Corey S. Powell (@coreyspowell) May 24, 2020
Throughout the history of the earth, magnetic poles have shifted. We know that even once every 250,000 years, they have swapped places. About 780,000 years ago the last change took place. Experts claim that we're not head to a pole reversal, so the development of the South Atlantic Anomaly doesn't mean that we need panic.
However, this could pose a problem for spacecraft and satellites in the area. Since the magnetic field in this region is weaker, spacecraft are more likely to damage equipment and spur malfunctions to charged particles.
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