4 ms·

No way man, magnetic field does way more than this: without its shielding our bodies and electronics are damaged by (possibly lethal doses) of radiation: https:

No way man, magnetic field does way more than this: without its shielding our bodies and electronics are damaged by (possibly lethal doses) of radiation: https://en.wikipedia.org/wiki/Earth%27s_magnetic_field#cite_ref-MerrillMagnetosphere_25-2 https://en.wikipedia.org/wiki/Earth%27s_magnetic_field#cite_... If significant parts of the global grid went down, we can't pump oil and water, can't grow food, can't ship freight. We're fucked in that case. Humanity I mean. Nobody knows how to live off the land in most cities, right? Not a good prognosis. Let's hope it does not disappear. Definitely not "very little" !! :P :) xx ;p

ben_w 4y ago
There is a lot of air between you and space, unlike the moon and space. We'd be fine. And the power grid isn't going to be taken down by just the magnetic field switching off, even CMEs are only a risk to the grid because of how they react with the magnetic field (and even then we could prevent that but for the politics). Plus we could fairly trivially make a replacement magnetic field. The numbers I've seen were for Mars, but the requirements were so small it would be a rounding error for the economy here on Earth.
- graderjs 4y ago
  There is a lot of air between you and space, unlike the moon and space. True. But the magnetic field is not insignificant. We'd be fine. False. And the power grid isn't going to be taken down by just the magnetic field switching off, even CMEs are only a risk to the grid because of how they react with the magnetic field (and even then we could prevent that but for the politics). Where are you getting this stuff man? Plus we could fairly trivially make a replacement magnetic field. Hahaha. Yeah right! As if
  - ben_w 4y ago
    • https://en.wikipedia.org/wiki/Geomagnetic_reversal https://en.wikipedia.org/wiki/Geomagnetic_reversal Early research assumed reversals have a period with no magnetic field at all, and demonstrated that the atmosphere was still sufficient. The magnetic field has definitely dropped to 5% of it's current value while humans have been around. • https://www.researchgate.net/profile/Ruth-Bamford/publication/355198821_How_to_create_an_artificial_magnetosphere_for_Mars/links/619549853068c54fa5f6d828/How-to-create-an-artificial-magnetosphere-for-Mars.pdf?origin=publication_detail https://www.researchgate.net/profile/Ruth-Bamford/publicatio... Conclusion (for Mars): > We have shown that the currents required are between ~0.2-0.5 GAmps in one or many solenoid loops. Whilst the power requirement will depend upon the material used, it can be estimated to be between 0.1 and 100 GW which is between less than one but up to 50 typical 2 GW power stations. While not trivial this is not unimaginably large, Even the big number is about half the annual installation of PV on Earth.
    - graderjs 4y ago
      Thank you! Interesting. Do you watch Suspicious Observers? What do you think? They cover many studies talking of the interactions of solar radiation, the galactic current sheet, and Earth phenomena.

ben_w 4y ago

There is a lot of air between you and space, unlike the moon and space. We'd be fine. And the power grid isn't going to be taken down by just the magnetic field switching off, even CMEs are only a risk to the grid because of how they react with the magnetic field (and even then we could prevent that but for the politics). Plus we could fairly trivially make a replacement magnetic field. The numbers I've seen were for Mars, but the requirements were so small it would be a rounding error for the economy here on Earth.

graderjs 4y ago
There is a lot of air between you and space, unlike the moon and space. True. But the magnetic field is not insignificant. We'd be fine. False. And the power grid isn't going to be taken down by just the magnetic field switching off, even CMEs are only a risk to the grid because of how they react with the magnetic field (and even then we could prevent that but for the politics). Where are you getting this stuff man? Plus we could fairly trivially make a replacement magnetic field. Hahaha. Yeah right! As if
- ben_w 4y ago
  • https://en.wikipedia.org/wiki/Geomagnetic_reversal https://en.wikipedia.org/wiki/Geomagnetic_reversal Early research assumed reversals have a period with no magnetic field at all, and demonstrated that the atmosphere was still sufficient. The magnetic field has definitely dropped to 5% of it's current value while humans have been around. • https://www.researchgate.net/profile/Ruth-Bamford/publication/355198821_How_to_create_an_artificial_magnetosphere_for_Mars/links/619549853068c54fa5f6d828/How-to-create-an-artificial-magnetosphere-for-Mars.pdf?origin=publication_detail https://www.researchgate.net/profile/Ruth-Bamford/publicatio... Conclusion (for Mars): > We have shown that the currents required are between ~0.2-0.5 GAmps in one or many solenoid loops. Whilst the power requirement will depend upon the material used, it can be estimated to be between 0.1 and 100 GW which is between less than one but up to 50 typical 2 GW power stations. While not trivial this is not unimaginably large, Even the big number is about half the annual installation of PV on Earth.
  - graderjs 4y ago
    Thank you! Interesting. Do you watch Suspicious Observers? What do you think? They cover many studies talking of the interactions of solar radiation, the galactic current sheet, and Earth phenomena.