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July 2014 – GEOLOGY - Earth’s magnetic field is a protective shield for our planet from cosmic radiation, but it’s also somewhat of a mystery – scientists aren’t sure why it moves and changes in intensity. And now the first set of high-resolution results from Esa’s three-satellite Swarm constellation reveal that the field is actually getting weaker, albeit by a small amount. Measurements made over the past six months confirm the general trend of the field’s weakening, with the most dramatic declines over the Western Hemisphere. Launched in November 2013, Swarm is providing unprecedented insights into the complex workings of Earth’s magnetic field, which safeguards us from the bombarding cosmic radiation and charged particles. In some areas, such as the southern Indian Ocean, the magnetic field has strengthened since January – although the overall trend is a weakening. The latest measurements also confirm the movement of magnetic North towards Siberia.
Earth's magnetic field, which protects the planet from huge blasts of deadly solar radiation, has been weakening over the past six months, according to data collected by a European Space Agency (ESA) satellite array called Swarm.
The biggest weak spots in the magnetic field -- which extends 370,000 miles (600,000 kilometers) above the planet's surface -- have sprung up over the Western Hemisphere, while the field has strengthened over areas like the southern Indian Ocean, according to the magnetometers onboard the Swarm satellites -- three separate satellites floating in tandem.
The scientists who conducted the study are still unsure why the magnetic field is weakening, but one likely reason is that Earth's magnetic poles are getting ready to flip, said Rune Floberghagen, the ESA's Swarm mission manager. In fact, the data suggest magnetic north is moving toward Siberia
originally posted by: myselfaswell
It's certainly not good news as one would expect to see a significant rise in cancer levels generally, in skin or otherwise, in both humans, livestock and the like.
originally posted by: GallopingFish
I have heard a theory that the Magnetic Field of Earth reacts with the Solar Cycles, and the Sun is at a weak point in its cycle. So it would make sense that the earths magnetic field is also at a weak point.
If the sun becomes more active earth's magnetic field will follow suit.
originally posted by: grumpy64
This may sound crazy but could this have something to do with the millions of tons of iron ore Australia is sending over to China each year? Could this affect the Earth's magnetism somehow? Has something been disrupted? Or is the field generated by the core? Dunno.