There are many places on earth that are famous for their mysterious powers, Like Bermuda triangle, devil's sea etc. But ever wondered if there existed one such place in space? Then you are right, Because there actually is one and It is called the South Atlantic Anomaly.
It is a region over South America and South Atlantic ocean centred at about 30 degrees west and 30 degrees south. It is a little larger than the entire United States. Some say its a danger to anything that enters it.
The SAA or South Atlantic Anomaly is responsible for numerous problems with satellites and spacecrafts, from messing up their programs to actually shutting down their function. NASA has reported that modern laptops have crashed when space shuttle flights pass through the anomaly. And International Space Station(ISS) avoids scheduling spacewalks when passing through it (which happens 5 times a day ).
The Hubble space telescope is actually turned off when passing through the anomaly (which passes through SAA for 10 successive orbits each day).
While Bermuda triangle and Devil's sea are merely lines drawn on map, South Atlantic Anomaly is a measurable physical presence. It is the area where the band of radiation known as earth's inner Van Allen radiation belt comes closest to earth's surface.
According to NASA, when a spacecraft enters into this area, it gets bombarded with protons exceeding energies of 3000 hits per square centimeter per second. This can produce glitches in data, problems with operation of onboard electronic systems, premature ageing of computers, detectors and other spacecraft components. No wonder why they switch off Hubble space telescope as it passes through the anomaly then. But still the phenomenon is not fully understood.
The SAA is thought to be the reason for early failures of the Globalstar Network's satellites. In October 2012, The Space X CRS-1 Dragon spacecraft attached to the International Space Station experienced a transient problem as it passed through the anomaly.
Its just not technical problems either, some astronauts report seeing shooting starts in their field of vision as they pass through the SAA. NASA sticks with the previous theory for explaining this too.
Ricardo Campana, at National Institute for Astrophysics in Bologna, Italy, has analysed radiation data from an X-Ray monitoring satellite called BeppoSAX, They found out that the anomaly is slowly moving westward.
The team is now designing a space telescope that will orbit through the lower part of the danger zone, which is not well studied.
The causes of anomaly are not fully understood. But scientists point out high amount of radiation causes the anomaly. But there is more to be studied about this before being so sure. Some conspiracy theorists even pin this on aliens. But we can hope the scientists get a complete answer to explain this phenomenon soon.