* Astronomy

Members Login
Post Info TOPIC: South Atlantic Anomaly


L

Posts: 130035
Date:
RE: South Atlantic Anomaly
Permalink  
 


Ancient Huts May Reveal Clues to Earth's Magnetic Pole Reversals

The fiery demise of ancient huts in southern Africa 1,000 years ago left clues to understanding a bizarre weak spot in the Earth's magnetic field - and the role it plays in the magnetic poles' periodic reversals.
The new data from the African burnings suggests that the South Atlantic Anomaly was up to its same field-weakening tricks over 1,000 years ago; if it's caused by something permanent near the Earth's core, it might play an important role in the Earth's magnetic-pole reversals.

Read more



__________________


L

Posts: 130035
Date:
Permalink  
 

Dead spacecraft helps map Bermuda Triangle of space

A European spacecraft has given us a detailed glimpse into a dangerous radiation zone a few hundred kilometres above the coast of Brazil.
The South Atlantic Anomaly (SAA) is the point where the Van Allen radiation belts - rings of charged particles that surround Earth - come closest to the planet's surface. When the belts were discovered in the 1950s, scientists suspected the SAA could pose some risk.

Read more



__________________


L

Posts: 130035
Date:
Permalink  
 

The High-Energy South Atlantic Anomaly Threatens Satellites

Much fanfare accompanied the Sept. 25, 2010, launch of the Air Force's Space Based Space Surveillance satellite.
Shortly after launch, the satellite passed over the South Atlantic, and things went awry. The satellite was hit by radiation that sent the sensors reeling and knocked out an electronics board payload. Suddenly, the expensive, specially-designed satellite could no longer do what it was built for.

Read more



__________________


L

Posts: 130035
Date:
Permalink  
 

The South Atlantic Anomaly (SAA) is an area where the Earth's inner Van Allen radiation belt comes closest to the Earth's surface. This leads to an increased flux of energetic particles in this region and exposes orbiting satellites to higher than usual levels of radiation. The effect is caused by the non-concentricity of the Earth and its magnetic dipole, and the SAA is the near-Earth region where the Earth's magnetic field is weakest.
Read more



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard