Likely just a forked stroke coming down hitting 2 spots almost at the same
time. multiple strokes in the same flash can often hit thousands of feet
apart, the national lightning detection network has an algorithm that groups
strokes hitting within a short time (.5 sec I think) and a small area
(1000'?) into a common event called a 'flash'... when looking at lightning
statistics data you have to keep in mind that each flash could represent
many strokes spread over a fairly large area.
Note, that 'sideflashes' are common, lightning hitting a tree, tower, wire,
or building, will often leave the object to hit something else part way
down. This is well documented in many fatal strokes to people standing near
trees or other objects.
David Robbins K1TTT
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: email@example.com [mailto:towertalk-
> firstname.lastname@example.org] On Behalf Of Jim Jarvis
> Sent: Tuesday, July 11, 2006 17:59
> To: email@example.com
> Subject: [TowerTalk] Ground to ground lightning? I doubt it.
> Not to be a complete contrarian, but the pic you posted could
> just as easily be two strikes, cloud to ground, more or less
> contemporaneous. Seems like a much more plausible explanation
> of the image.
> As for the global warming comment, Michael Creighton's list of
> academic papers would disagree with the premise that it's taking
> place, or that man is the proximate cause.
> Personally, I have pics of my grandfather and father ice fishing
> in NJ, with the model-A out on the ice. That particular river
> hasn't been frozen in my lifetime. Something's going on.
> From: Thomas Giella KN4LF [mailto:firstname.lastname@example.org]
> Sent: Tuesday, July 11, 2006 11:12 AM
> To: Thomas Giella KN4LF; Lori Giella
> Subject: Florida Ground To Ground Lightning Strike
> Florida is the lightning capital of the U.S. with the highest annual
> of lightning related injuries and deaths. There are many types of
> discharges but cloud to ground (positive) and ground to cloud (negative)
> discharges do the most damage.
> In June 2006 a Skywarn observer took a photograph of a lightning discharge
> on Sugarloaf Mountain (elevation 312 feet) in Lake County Florida. The
> photograph reveals the first "documented" ground to ground lightning
> I have heard of lightning striking the sides of buildings rather then the
> roof, chimney or attached TV antenna and now I know how that has happened.
> The unusual lightning bolt is probably related to global warming.
> Take Care,
> Thomas F. Giella, KN4LF
> Retired Meteorologist & Space Plasma Physicist
> Lakeland, FL, USA
> Jim Jarvis
> 732 548 5573 office
> 732 548 7559 home
> 443 618 5560 cell
> 123 Norris Avenue
> Metuchen, NJ 08840
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