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About how to prevent being struck by lightning

  1. Aug 11, 2004 #1
    They say if you're in a thunderstorm and you have no other place to go, you should search a hollow, crouch and hold your feet close together. The hollow thing and the crouching thing are easy to understand, but what's the reason for putting your feet together?
     
  2. jcsd
  3. Aug 11, 2004 #2

    pervect

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    If lightning strikes near you, the ground itself will have current flowing through it, so there will be a voltage difference between any two different points on the ground. If you keep your feet close together, you minimize the voltage difference between your feet, which minimizes the current flow thorugh your legs.
     
  4. Aug 11, 2004 #3

    selfAdjoint

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    And if you can stand to lie down on the wet surface, you will maximize your area in contact with the ground. This should minimize your exposure to lightning, but nothing can absolutely eliminate it.
     
  5. Aug 11, 2004 #4

    jcsd

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    The usual advice is don't be the tallest thing around and don't stand near the tallest thing around. One of the safest places to be is actually inside of a car.
     
  6. Aug 11, 2004 #5
    Do not stand near other people. 15 feet apart should be the minimum.
     
  7. Aug 11, 2004 #6
    And do not play golf.
     
  8. Aug 12, 2004 #7

    Gza

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    Period. :smile:


    It's all about Football and Basketball. (which also wouldn't be very smart to be playing outdoors in the middle of a lightning storm.)
     
  9. Aug 12, 2004 #8
    Yes, that sounds logical.

    I wondered about it because a few days ago I almost got into such an uncomfortable situation. I was climbing on a mountain top when I heared thunder from far away, and the "top" actually was a big rubble waste dump, no big rock or anything around. So, whatever I would have done I would have been the tallest thing around, except of course for the cast iron summit cross :rolleyes:
    Luckily, the thunderstorm didn't reach us, it only started to rain a bit.
     
  10. Aug 16, 2004 #9
    Better than pole vaulting, at least.
     
  11. Aug 22, 2004 #10
    I heard one of the best things is a faraday cage. like a resourceful one such as a car. go in one of those.
     
  12. Aug 22, 2004 #11
    The lightning will still strike the car, but will likely pass around the occupants to ground via the car's exterior, as long as they refrain from nearing the sheet metal skin.
     
  13. Aug 22, 2004 #12
    The storm doesn't have to reach you for the risk of lightning strike to be a real threat. I live in Florida and see a lot of lightning, and even know a few people that have been hit. Many times people are struck from the leading edge of the storm even when it seems miles away.
     
  14. Aug 22, 2004 #13
    :eek:
    Good to know

    But the best way to protect yourself is and will ever be: Don't blaspheme :devil:


    :wink:
     
  15. Aug 22, 2004 #14

    HallsofIvy

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    No, the main point about an automobile is that it is sitting on rubber tires which are insulators- lightning can't get from the car to the ground and so wont strike the car.

    By the way, sitting in a SMALL hollow or in a SHALLOW cave, is not a good idea. Lightning, running along the surface of the ground can jump small distances, possibly passing through a person. Also, if you are in contact with the ground, you can be hit. Backpackers often take off their back packs and sit ON them during a thunderstorm.
     
  16. Aug 22, 2004 #15
    Backpacks don't seem to be much thicker than shoe soles from the lightning's point of view. :confused:
     
  17. Aug 22, 2004 #16
    HallsofIvy,

    I have heard that car tires themselves insulating one substantially from lightning is a fallacy. Lightning, about 100,000,000 volts of it, travels through air, a pretty good insulator, often more than a mile to the ground. How can 6" of tire compare?
     
  18. Aug 24, 2004 #17
    I think I would feel safer in a grounded car, rather than sitting on a tire, if I was stuck in a storm. The E field in hollow metal is 0 after all.
     
  19. Oct 21, 2006 #18
    Faraday Cage

    No, I'm pretty sure its not the tires that save you, but rather by nature of being in the "faraday cage" shields the interior because of the high potential discharge that affects the exterior.


    Your chances of getting struck increase, but so does the probability that you live.
     
  20. Oct 21, 2006 #19

    LURCH

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    Yes, the car acts as a Farraday Cage (during a lightning storm the tires are almost always covered with a film of dirty water that makes a great connection to ground.

    Anybody ever see that video of the Blazer getting hit?
     
  21. Oct 21, 2006 #20

    moo

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    Rubber tires actually have a high carbon content, which is an excellent conductor.

    On a side note - a rubber automotive heater hose will carry enough current to short an electric fence. Lol, don't ask... :biggrin:

    moo
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    Last edited: Oct 21, 2006
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