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South atlantic anomaly8/3/2023 ![]() ![]() New data obtained by the European Space Agency (ESA) Swarm satellites has revealed the existence of a mysterious anomaly weakening the Earth’s magnetic field. Mains level : South Atlantic Anomaly and its impact Prelims level : Van Allen Radiation Belt, South Atlantic Anomaly ![]() Enviro & Biodiversity Economics Storiesįrom UPSC perspective, the following things are important :.UPSC Mains Solutions, Sample Answers, Civilsdaily TS Hit Ratio.UPSC IAS Prelims Trend Analysis Year-wise and subject-wise.Comprehensive Self-Study Plan for Physical Geography | IAS Prelims & Mains.Comprehensive Self Study Plan for Economics| IAS Prelims & Mains.Comprehensive Self Study Plan for Indian History | IAS Prelims & Mains.Study Guide : How to prepare Polity for IAS Prelims.IAS officer salary after 7th Pay Commission | IAS Promotion Chart | Vs.CivilsDaily’s UPSC material and notes: FREE UPSC Materials for you.Must Read (OLD & NEW) NCERTs for IAS Preparation.Recommended Books for UPSC Exam (Prelims & Mains).It's a compelling theory, which could shed light on the mysteries surrounding the magnetic field surrounding our planet that protects us from the Sun's harmful radiation.īut until Yuan's claims can be evaluated, we will have to take it for what it is: a theory. ![]() ![]() "Why doesn't the same weakness occur in the magnetic field above the Pacific, where the other province is?" Technical University of Denmark geophysicist Christopher Finlay told BI. One of these blobs also happens to be near southern Africa, not too far from the South Atlantic Anomaly.īut it's not a perfect fit, problematizing the theory. Scientists believe the strange dip in the field is caused by something huge interrupting this process under the Atlantic Ocean.Īs it turns out, the relatively hot and dense qualities of the two LLSVPs could technically be significant enough to affect these convection currents, Yuan proposed. The blobs may also have a connection to the South Atlantic Anomaly, as our planet's magnetic field is generated by the swirling iron in Earth's outer core, wherein hotter material rises into the partially solid mantle above and is replaced by sinking, denser material, a process known as convection. Yuan and his colleagues found seismological evidence that the blobs, formally known as "large low-shear velocity provinces" (LLSVPs), were quite different from the rock in the rest of the Earth's mantle. Last month, a team of scientists led by Qian Yuan, a graduate student from Arizona State University, presented the idea that the two underground blobs, each millions of times larger than Mount Everest, could have been shards left over from the collision. Now, scientists suspect it may have a connection to two mysterious blobs of dense material discovered in the Earth's mantle that recent research suggests could be the partial remains of Theia, an ancient Mars-sized protoplanet believed to have smashed into the Earth around 4.5 billion years ago, as Business Insider reports. The " South Atlantic Anomaly," as it has become known, can wreak havoc with satellites and spacecraft that happen to pass over it. Scientists have long observed a growing "dent" in the Earth's magnetic field just above the southern Atlantic Ocean. ![]()
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