Author Topic: Shape of Lightning bolt not so random...  (Read 1257 times)

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Offline joeqsmith

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Shape of Lightning bolt not so random...
« on: August 05, 2018, 10:50:41 pm »
I saw this the other day.  Grabbed the footage, slowed it down and took a screen shot.     

https://youtu.be/2XP_4Bzpct8?t=150
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline ignator

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Re: Shape of Lightning bolt not so random...
« Reply #1 on: August 06, 2018, 12:08:49 am »
I don't think those close 2 additional parallel strikes are real, more they are something generated by the camera lens. They don't seem to end in a discharge point. Or am I missing something.
The last I heard about the lighting path, it connects multiple ion trails from high speed particles, traveling from upper levels of the atmosphere. That was the theory 30 years ago.
 

Offline Cyberdragon

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Re: Shape of Lightning bolt not so random...
« Reply #2 on: August 06, 2018, 12:13:44 am »
That's definitely just an artifact. I see about three goal posts as well.
*BZZZZZZAAAAAP*
Voltamort strikes again!
Explodingus - someone who frequently causes accidental explosions
 

Offline StillTrying

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Re: Shape of Lightning bolt not so random...
« Reply #3 on: August 06, 2018, 12:14:37 am »
It might be taken from a commentary box through multiple layers of glass.
CML+  That took much longer than I thought it would.
 

Offline Muxr

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Re: Shape of Lightning bolt not so random...
« Reply #4 on: August 06, 2018, 12:19:02 am »
Most likely a lens element reflection.
 

Offline joeqsmith

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Re: Shape of Lightning bolt not so random...
« Reply #5 on: August 06, 2018, 12:24:03 am »
Odd that the center shows first and disappears first, long before the strike at the tower ends.

How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline Muxr

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Re: Shape of Lightning bolt not so random...
« Reply #6 on: August 06, 2018, 12:33:50 am »
could be just the effect of the rolling shutter.
 

Offline RoGeorge

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Re: Shape of Lightning bolt not so random...
« Reply #7 on: August 06, 2018, 12:35:00 am »
I am intrigued by the same shape/waveform of the strike hitting the stadium and then the building, too.

If it were just reflections on the lenses, how come that it is such a long delay between them?

Offline Muxr

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Re: Shape of Lightning bolt not so random...
« Reply #8 on: August 06, 2018, 12:38:08 am »
I am intrigued by the same shape/waveform of the strike hitting the stadium and then the building, too.

If it were just reflections on the lenses, how come that it is such a long delay between them?
The sensor was likely over-saturated by the real non reflected lightning, that combined with the rolling shutter effect could be playing tricks on us.
 

Offline StillTrying

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Re: Shape of Lightning bolt not so random...
« Reply #9 on: August 06, 2018, 01:20:31 am »
It has to be the image sensor or processing getting confused with the very rapidly changing light level.

By the false images of the strike, you can tell there's some spare image sensor pixels above the wide screen format shape shown.
CML+  That took much longer than I thought it would.
 

Offline raptor1956

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Re: Shape of Lightning bolt not so random...
« Reply #10 on: August 06, 2018, 04:29:33 am »
As an aside, the charge carried in a typical lightning bolt is less than 100C with a large bolt being more like 350C whereas a single AA battery can deliver about 5000C.  Of course, the energy content can be millions of times greater in a lightning bolt.


Brian
 

Offline Red Squirrel

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Re: Shape of Lightning bolt not so random...
« Reply #11 on: August 06, 2018, 05:12:56 am »
One interesting thing with lightning is before it actually strikes a specific target, there is often discharge from many targets all around.  I forget what they call that, corona?  Or is that something else?  It happens for an extremely short amount of time, before the lightning "decides" what to hit.  This is why stuff can fry even from indirect hits.

This particular pic looks like it's reflections/artifacts though. 


As a side note, I captured this the other day when camping:



Lightening is always so cool to see.
 

Offline raptor1956

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Re: Shape of Lightning bolt not so random...
« Reply #12 on: August 06, 2018, 05:22:36 am »
One interesting thing with lightning is before it actually strikes a specific target, there is often discharge from many targets all around.  I forget what they call that, corona?  Or is that something else?  It happens for an extremely short amount of time, before the lightning "decides" what to hit.  This is why stuff can fry even from indirect hits.

This particular pic looks like it's reflections/artifacts though. 


As a side note, I captured this the other day when camping:



Lightening is always so cool to see.


And, for another interesting take on lightning in Canada...




Brian
 

Offline GregDunn

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Re: Shape of Lightning bolt not so random...
« Reply #13 on: August 06, 2018, 05:55:03 am »
One interesting thing with lightning is before it actually strikes a specific target, there is often discharge from many targets all around.  I forget what they call that, corona?  Or is that something else?  It happens for an extremely short amount of time, before the lightning "decides" what to hit.  This is why stuff can fry even from indirect hits.

It's called the leader.
 

Offline ebastler

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Re: Shape of Lightning bolt not so random...
« Reply #14 on: August 06, 2018, 06:07:13 am »
One interesting thing with lightning is before it actually strikes a specific target, there is often discharge from many targets all around.  I forget what they call that, corona?  Or is that something else?  It happens for an extremely short amount of time, before the lightning "decides" what to hit.  This is why stuff can fry even from indirect hits.

It's called the leader.

I think "streamer" is the specific term for the pre-flash discharge channel which builds from the ground up. The non-localized discharge glow which may or may not result in formation of a flash channel is indeed called corona.

https://en.wikipedia.org/wiki/Lightning#Lightning_leaders
 

Offline mtdoc

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Re: Shape of Lightning bolt not so random...
« Reply #15 on: August 06, 2018, 06:43:49 am »
The non-localized discharge glow which may or may not result in formation of a flash channel is indeed called corona.

Or in some cases St. Elmos Fire.
 
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