## B-1, the person who called you

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• a technician, or whatever, was just corrected by a physics professor: Well mike you ve surprised me. The following quote contains a physical entity
Message 1 of 702 , Dec 10, 2001
a technician, or whatever, was just corrected by
a physics professor:<br><br>"Well mike you've
surprised me. The following quote contains a physical
entity (boldfaced) no one on this list has ever alluded
to. More below." <br>Mike wrote <br>"The coupling
mechanisms was said by them not to be well understood, but
it seems probable that "capacitive coupling" through
the displacement current my drive conduction currents
within the ionosphere [Hale and Baginski, 1987]. From
this link, is evidence of the incredible currents
involved:" <br>Now displacement current has a very specific
physical meaning; I wouldn't have thought it ever entered
into any geophysical calculation. What do you
understand this expression to mean? Maybe I'd better tell
what it means and you just tell us if the authors who
used this expression meant something else. The
displacement current is the uncharged electrical current which
passes between the plates of any capacitive elements in
order to maintain field continuity--in particular the H
field flux. The electrical current is uncharged by
virtue of being composed of equal numbers of virtual
positive charges moving one way and negative charges
moving the other. <br><br><br>Alan (and Dave D)As a
check here; the stored energy of a capacitor is <br>1/2
C *V^2. <br>Therefore using these numbers we get
<br>41.65 *10^8 watts for the stored energy in fair
ordinary volts are both MKS units.) Ooops I see, I've got
energy and you had power. Therefore my units are watt x
time. From the time constant of 1.64 second, I would
guess that the total stored energy is 41.65 *10^8
watt-seconds. This equals 41.65/3600/1000 = 11*10*2 kw-hrs or
about \$50. <br>I confess I haven't looked up the
earth's capacitance; but your expression worries me. The
relevant capacitance for the fair weather current should
be the capacitance of concentric spheres separated
by the distance from surface to (roughly)
tropopause--yet you have no separation distance. So if for the
R, we would increase the capacitance by
4*pi*radius/separation +AH4- 12 * 4000/6 +AH 8000. This might the source
of the discrepancy between your value and Dave D's
quoted larger value.
• On Feb 28th, the Interplanetary Magnetic Field swung to a strong south-pointing orientation. That, coupled with an elevated solar wind speed and density,
Message 702 of 702 , Mar 1, 2002
On Feb 28th, the Interplanetary Magnetic Field
swung to a strong south-pointing orientation. That,
coupled with an elevated solar wind speed and density,
triggered a G-1 class geomagnetic storm. The result was
some high latitude aurora. See this link for a
photgraph of aurora observed over Quebec :
<a href=http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg target=new>http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg</a> . As of right now, there are 3 sunspot regions,
namely 9839, 9842, and 9845, that appear to be capable
of producing M-class flares. Regions 9839 and 9842
are close to rotating out of view over the western
limb of the solar disk. Sunspot region 9845, however,
is close to the sun's central meridian. A rather
large coronal hole is also approaching the sun's
central meridian, and coming into an Earth-pointing
position. High speed colar wind gusts are likely around the
first of next week.<br><br>The current solar and
geomagnetic conditions are :<br><br>NOAA sunspot number :
153<br>SFI : 188<br>A index : 10<br>K index : 1<br><br>Solar
wind speed : 372.3 km/sec<br>Solar wind density : 4.4
protons/cc<br>Solar wind pressure : 1.1 nPa<br><br>IMF : 8.4
nT<br>IMF Orientation : 0.7 nT North<br><br>Conditions for
the last 24 hours : <br>Solar activity was low. The
geomagnetic field was quiet to unsettled. Stratwarm Alert
exists Friday.<br><br>Forecast for the next 24 hours
:<br>Solar activity will be low to moderate. The geomagnetic
field will be quiet to unsettled.<br><br>Solar Activity
Forecast :<br>Solar activity is expected to be low to
moderate for the next three days. Region 9845 is a
possible source for isolated M-class
flares.<br><br>Geomagnetic activity forecast :<br>Geomagnetic field activity
is expected to be mainly quiet to unsettled, until
the onset of high speed stream effects from a
recurrent coronal hole begin to develop by day three of the
forecast period. Isolated active conditions are
anticipated thereafter.<br><br>Recent significant solar flare
activity :<br>None
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