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Lightning is rare here, and ground strikes are very rare. we had about
1200 ground hits last night. Our overhead power lines don't often have
top ground wires, so lighning will hit the power conductors.

http://www.sfgate.com/local/article/Bay-Area-thunder-lightning-rain-storm-weather-SF-12189916.php#photo-14095379


--  

John Larkin         Highland Technology, Inc
picosecond timing   precision measurement  

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Re: lightning
On Wednesday, September 13, 2017 at 5:21:39 AM UTC+10, John Larkin wrote:
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You left off the O.T. Lightning is electrical, not electronic.

--  
Bill Sloman, Sydney

Re: lightning
On Tuesday, September 12, 2017 at 3:21:39 PM UTC-4, John Larkin wrote:
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http://www.climatecentral.org/news/lightning-strikes-will-increase-with-warming-18323

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Re: lightning
On Tue, 12 Sep 2017 17:22:30 -0700 (PDT),
snipped-for-privacy@gmail.com wrote:

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Sounds like more thunderstorms. We seem to be having more here last
couple of years. That's great... we love them.



--  

John Larkin         Highland Technology, Inc
picosecond timing   precision measurement  

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Re: lightning
On Tue, 12 Sep 2017 17:45:38 -0700, John Larkin

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We sit out on the patio, with a glass of wine, and watch the "show".
With the Superstition Mountains only 10 miles to the north, and in our
line of sight, it can be quite spectacular.
        
                                        ...Jim Thompson
--  
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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Re: lightning

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You can detect severe weather including tornadoes by locating lightning  
strikes:

  Network for Lightning and Thunderstorms in Real Time
  http://en.blitzortung.org/live_lightning_maps.php?map30%

The organization is a volunteer, global effort to map lighting strikes.

You can join by making your own lightning detector. Here is a brief
description:

  Project Description - (14. February 2016, 11:10)
  Assembly Instructions System Blue - (under developement)

  Our newest detector system is called "System Blue". It  will replace
  the former  detector  system   called  "System  Red".  The essential
  difference between the two systems is the way how these  systems are
  assembled. System Red is a kit with mainly wired  components. System
  Blue contains  mostly  SMD  parts. It  will  be  delivered partially
  assembled. In  addition, the amplifier and filter  system  have been
  changed as  well as the digital part. System Blue  is  also prepared
  for an  installation in a compact housing. This is  achieved  by the
  dimension of  the  controller  board   and  the  arrangement  of the
  terminals. We  will  probably  start with  a  minimal  basic version
  similar to  that  what we are currently  testing,  see  the pictures
  above. Later  on, the system can be extended  by  further components
  and adjusted according to the experience acquired.

  http://en.blitzortung.org/cover_your_area.php

The current system Red is described here. I mirrored the pdf file to reduce  
the load on their server and to increase your download speed:

  System Red Mirror
  https://drive.google.com/open?id0B%w2W6KGPX7fgQkxMamlHbmdnZk0


Re: lightning

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Most cool. Our storm has moved out and it looks like Truckee is
getting hit pretty good.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: lightning
On 9/13/2017 7:57 AM, John Larkin wrote:
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The closest lightning strike I ever experienced was in 1985. I  
was washing my car in my front yard under a torrential downpour  
when it struck a tree at the far end of my backyard, 60m from  
where I was standing. It was LOUD, louder than when a bomb  
exploded 30m from my house some 15 years ago. My servant, who'd  
been looking out a back window, said that he was almost knocked  
off his feet by the shockwave.

But the biggest lightning strike by far in my experience was in  
September 1984. I was in a friend's house when it struck at about  
7 pm. It felt really really close. The TV died immediately. Half  
an hour later, their daughter cam home from night college half a  
kilometer away and she said that it felt like the strike was  
right next door. The next day, I received reports of lightning  
damage from power stations in various parts of the state, some of  
them 150 km apart. The strikes all occurred at the same time and  
everyone claimed that the strike was really close to them.


Re: lightning

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I was walking in a parking lot in the rain holding  an  
umbrella with a metal pole.

lightning hit a tower about 200 yards away.

I felt a shock from the umbrella.

m


Re: lightning
On 09/13/2017 06:09 AM, Pimpom wrote:
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Probably positive lightning.  Those "bolts from the blue" come out the
top of the storm.  The can travel miles, and they're much more intense
than the little bitty negative ones.

Cheers

Phil Hobbs


--  
Dr Philip C D Hobbs
Principal Consultant
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Re: lightning

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I did some circuit design in the early '80's for a Tucson company,
Lightning Location & Protection (some U of A professors & grad
students).

Detection was via E-field and B-field, and multiple units were
data-linked across the state (in those days) by acoustic modems ;-)
        
                                        ...Jim Thompson
--  
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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