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Date: Fri, 23 Sep 2011 10:54:02 -0400
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From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group@blacksheep.org
Subject: Magnetic Anomalies Re: LF: Re: Turbine magnets
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Mal,

   Magnetic anomalies are a well known geophysical phenomena.
The earth's magnetic field periodically reverses itself.
As a rock layer with magnetic properties cools (perhaps molten magma)
it takes on the polarity of the prevailing magnetic field at that
time.
Thus the rock at a later time can either add to or subtract from the
earth's magnetic field.
Reversals in magnetic field were used to prove the plate tectonics
theory as symmetric reversals can be seen either side of the mid-ocean
ridges.

Furthermore, Scotland has well known and studies magnetic anomalies
(see references below for a start):


http://www.nature.com/nature/journal/v303/n5917/abs/303516a0.html

http://sjg.lyellcollection.org/content/24/3/215.abstract

http://www.earth.ox.ac.uk/~tony/watts/downloads/Watts71.pdf


73 Warren K2ORS
( a lapsed or should I say recovering geophysicist)




On Fri, Sep 23, 2011 at 8:55 AM, mal hamilton <g3kevmal@talktalk.net> wrote=
:
> Dennis
> On the motorway near Glasgow the GPS instructed me to keep right when in
> fact I had to keep to the left lane. Strange things happen in Scotland, t=
he
> mystery was solved when I noticed the road had been altered on a couple o=
f
> occassions, so I followed the road signs.
> It pays to keep alert and have additional nav aids.
> Now back to LF/MF observations and all quiet at present although 10 metre=
s
> is wide open worldwide.
> de mal/g3kev
>
>
> ----- Original Message -----
> From: DENNIS EASTERLING
> To: rsgb_lf_group@blacksheep.org
> Sent: Friday, September 23, 2011 10:58 AM
> Subject: Re: LF: Re: Turbine magnets
> Hi All
>
> Chatting about this at the radio club last night, one member has noticed =
a
> similar effect as Mal when passing Letchworth swimming pool, though no wi=
nd
> generators in sight. Perhaps we have gremlins about?
>
> 73 Dennis M0JXM
>
> ----- Original Message -----
> From: M0FMT
> To: rsgb_lf_group@blacksheep.org
> Sent: Thursday, September 22, 2011 9:01 PM
> Subject: Re: LF: Re: Turbine magnets
> Hi all
>
> I think the MoD have a say in the locating of Wind Turbines owing to ther=
e
> effect on RADAR but nothing to do with stray magnetic fields as far as I =
am
> aware.
>
> 73 es GL Pete M0FMT IO91UX47VN
> From: Graham <g8fzk@g8fzk.fsnet.co.uk>
> To: rsgb_lf_group@blacksheep.org
> Sent: Thursday, 22 September 2011, 21:33
> Subject: Re: LF: Re: Turbine magnets
>
>
> I think=A0 there=A0 are=A0 some problems=A0 with=A0 walking=A0 in Scotlan=
d=A0 using
> magnetic=A0 compasses=A0 , due to the=A0 rocks ??
> From: Andy Talbot
> Sent: Thursday, September 22, 2011 9:15 PM
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: Re: Turbine magnets
> Surely if the magnetic field leaked that much, the generators would suffe=
r
> efficiency.
> They are designed as closed magnetic circuits, with all the field lines
> closely confined in iron, with small air gaps
>
> Andy
> 'jnt
>
>
> On 22 September 2011 21:07, Hugh M0WYE <m0wye@radiouk.com> wrote:
>
> Seems unlikely that the magnetism would reach that far to me - the magnet=
ic
> field would be no different to any other large generating set - they are
> just an ordinary alternator driven through a gearbox.
> If they did affect magnetic compasses you would have thought that the pla=
ce
> you would really notice it would be around the coast, with small boats
> sailing in amongst them.
> Although they look as if they are turning slowly, they can't do many rpm
> before the tips of the blades go supersonic, as the blades are many 10s o=
f
> metres long.
> Over what distance did you notice the magnetic=A0effect? perhaps I could =
get
> down to the ones on Romney Marsh, here in Kent and see if=A0they have any
> effect on a compass needle.
>
> The moving blades can affect radio reception for people living nearby,
> although I've not noticed this myself.
>
> 73
> Hugh M0WYE
>
> ----- Original Message -----
> From: mal hamilton
> To: rsgb
> Sent: Thursday, September 22, 2011 5:09 PM
> Subject: LF: Turbine magnets
> Great for LF!!!!!!!!!!!!!
>
> Experience
>
> Driving to Gleneagles in Scotland last weekend my car magnetic compass wa=
s
> reading backwards and erratic and I wondered why.
> The hills es mountain tops are covered with WIND TURBINES, =A0hugh beasts=
 and
> only turning slowly, cannot be producing much electric.
> however thinking about it I have concluded that the strong=A0MAGNETS in t=
he
> turbines=A0must=A0effect a magnetic compass, =A0possible aeroplanes as we=
ll except
> they are flying very=A0high, might also have an influence on GPS=A0freque=
ncies
> and navigation in these areas
> I must say these hugh Monsters strewn all across the Scottish mountain to=
ps
> and countryside=A0spoils the scenery.
> =A0de Mal/G3KEV
>
>
>
>
>
>



--=20
73 Warren K2ORS
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XGJ
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XSH/23
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XGR/1