EVO Theory - a new paper from Graham Hubler.

  • This is a nice short video, showing lots of different slow-motion leaders.


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  • Was googling for references to "dark lightning", after reading a post by Gennadiy Tarassenko (thanks!) and came across the 2013 page below. I think this might have been mentioned before, somewhere on the forum, but I can'f find it now.


    Scientists detect dark lightning linked to visible lightning


    The (open access) paper itself can be found at: https://agupubs.onlinelibrary.…oi/full/10.1002/grl.50466


    But this short video is quite a good explanation of the events, as detected.


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    What I do think is notable is that the start of the leader formation process appears not to be coincident with the gamma ray flash (that seems to come later in the leader sequence), but is coincident with an initial short pulse of VLF radio frequency noise.

  • Another interesting paper, from July 2022:


    Multi‐Pulse Corona Discharges in Thunderclouds Observed in Optical and Radio Bands
    How lightning initiates inside thunderclouds remains a major puzzle of atmospheric electricity. By monitoring optical emissions from thunderstorms, the…
    www.ncbi.nlm.nih.gov


    Quote

    How lightning initiates inside thunderclouds remains a major puzzle of atmospheric electricity. By monitoring optical emissions from thunderstorms, the Atmosphere‐Space Interactions Monitor (ASIM) onboard the International Space Station is providing new clues about lightning initiation by detecting Blue LUminous Events (BLUEs), which are manifestations of electrical corona discharges that sometimes precedes lightning. Here we combine optical and radio observations from a thunderstorm near Malaysia to uncover a new type of event containing multiple optical and radio pulses. We find that the first optical pulse coincides with a strong radio signal in the form of a Narrow Bipolar Event (NBE) but subsequent optical pulses, delayed some milliseconds, have weaker radio signals, possibly because they emanate from a horizontally oriented electrical discharges which does not trigger full‐fledged lightning. Our results cast light on the differences between isolated and lightning‐initiating electrical discharges.

  • Possibly of interest to bayak (and others.!)


    Ball Lightning as Plasma Vortexes.

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    Abstract

    The idea that ball lightning is a plasma manifestation has been put forth by many authors. One of the major drawbacks of this approach concerns the stability of these structures. After showing the theoretical existence of pure rotating electromagnetic waves in equilibrium, we argue that these can reasonably provide a robust stabilizing scaffolding for the development of ball lightning phenomena.