Most Recent Changes in Earth's Magnetic Field; Sources Analyzed

  1. Dotini

    Dotini 756
    Gold Member

    The first set of high-resolution results from ESA's three-satellite Swarm constellation reveals the most recent changes in the magnetic field that protects our planet.

    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.

    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.

    But in other areas, such as the southern Indian Ocean, the magnetic field has strengthened since January.

    The latest measurements also confirm the movement of magnetic North towards Siberia.

    These changes are based on the magnetic signals stemming from Earth's core. Over the coming months, scientists will analyse the data to unravel the magnetic contributions from other sources, namely the mantle, crust, oceans, ionosphere and magnetosphere.
  2. jcsd
  3. Greg Bernhardt

    Staff: Admin

    So not only will people be affected by changing climates, but also magnetic fields? Life is going to get real tough for some people.
  4. Perhaps the title should read:

    "Most Recent Changes in Earth's Magnetic Field; Sources to be[\b] Analyzed."
  5. Dotini

    Dotini 756
    Gold Member

    Last edited: Jul 23, 2014
  6. jim hardy

    jim hardy 5,460
    Science Advisor
    Gold Member
    2014 Award

    it seems not to have hurt the spacecraft. i remain skeptical about the doomsayers.
  7. Evo

    Staff: Mentor

  8. jim hardy

    jim hardy 5,460
    Science Advisor
    Gold Member
    2014 Award

    Thanks Evo - that's a good article.

    Telegraphy back then was single wire and i don't think they had lightning protection, perhaps some history buff knows better.

    I have Missouri heritage - "show me".
    1 person likes this.
  9. I have been wondering about that. Since the spacecraft is there to study the sun, it may be packed full of tinfoil hats to protect it.:confused:
  10. davenn

    davenn 4,364
    Science Advisor
    Gold Member
    2014 Award

    Yeah, I read that article myself a day or two before it was posted here
    I couldn't believe the totally overhyped comments about the "earth being destroyed" blah, blah, blah
    there is so much garbage media reporting out there

    no, that's more likely to be the "southern lights" Aurora Australis reaching north to Tahiti

    Much more likely than the nthrn aurora going south of the equator :wink:

  11. Dotini

    Dotini 756
    Gold Member

    That would be 12% over the next 10 years, based on an extrapolation of the previous 50 years. But according to the OP, the protective magnetic field over North America is declining at a rate 10 times faster than previously. This for unknown reasons which the ESA Swarm effort is attempting to investigate.

    But I do agree it's easy and certainly jolly good fun to blow this all off with talk of doomsayers and tinfoil hats. Particularly since there's nothing that can be done about it short of making expensive preparations for something that may never happen - or may happen over some other continent and not here. A contingency plan on a large scale might consist of repatriating the manufacture and stockpiling of large transformers to North America, or even reducing our reliance on continental length high tension power lines so vulnerable to ground currents. But this runs counter to current economic and industrial policy.

    Personally - as opposed to the collective large scale - I'm more interested in the science involved than the economics, engineering or social questions. I will be making absolutely no preparations to lay in food or batteries at my home or fishing cabin, relying instead on my wine cellar. But I will follow developments from ESA Swarm for their academic interest. :smile:
  12. Evo

    Staff: Mentor

    Dotini, the field is strengthening elsewhere. I have posted about this before and not up to posting about it again. The 'flip' when it comes, some time in the next 1,000 years, will not be everywhere at once. So settle down
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