(meteorobs) Bonus capture - SPRITE

[CheekyGeek]

This is FASCINATING stuff (and strictly speaking OT to meteorobs, but
highly significant work - given how little we understand about the
relatively rare phenomenon of sprites).

Earlier this year, a photographer who lives in Blair, Nebraska
captured a sprite that came from the top of a storm that was in
north-central Iowa at the time. He had been out photographing the
Aurora Borealis and got an incredible still of a sprite with aurora.
His page on that also shows that he was not the first to capture a
sprite with aurora.
See: http://www.extremeinstability.com/2013-5-31.htm

This made me wonder if sprite activity is not linked to the earth's
geomagnetic field (or some component of it). Getting an accurate time
stamp is important. I think we could then look at the geomagnetic data
for the same time period to see if there is any commonalities that can
be discerned.

Darren Addy
Kearney, Nebraska

On Wed, Aug 14, 2013 at 11:22 AM, Thomas Ashcraft
<ashcraft at heliotown.com> wrote:
> On 8/14/13 9:53 25000, bob alongi wrote:
>> Thomas - Nice grab to complement the other two independent catches.
>> Can you elaborate on why you are monitoring 2.5 MHz ?
>>
>> bob
>
> Hi Bob,
>
> 2.5 MHz captures another part of the lightning spectrum very well. In
> that specimen in stereo you can hear the sprite generating lightning
> stroke "pop" at VLF-ELF and on the other sound channel of 2.5 MHz the
> sprite energy follows through and trails off.
>
> Also, 2.5 MHz is the WWV time signal station which puts an audio time
> stamp into my system. With the time beats in audio I can sync up my
> other frequency audio recordings be it meteor forward scatter, high
> frequency, VHF, VLF-ELF or whatever. Works well for precise data.
>
> Thomas
>
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