By the year 1200, he was a seasoned chronicler of around 50 years of age based in Canterbury. The identity of the observer isn't clear, though it's unlikely to be the monk himself. From there a sort-of fiery globe threw itself down into the river with a spinning motion it dropped time and again below the walls of the previously mentioned bishop's household." That, growing into a spherical shape under the black cloud, remained suspended between the Thames and the lodgings of the bishop of Norwich. In the middle of this, growing from an uncovered opening, like the opening of a mill, I know not what white colour ran out. ![]() For the densest and darkest cloud appeared in the air growing strongly with the sun shining brightly all around. "On the 7th of the ides of June, around the sixth hour, a marvellous sign descended near London. One of these copies, a Latin text edited in 1879 by Bishop William Stubbs, was subsequently translated into the following English by Gasper. The monk's Chronicle was most likely written around the start of the 13th century, with translations being made over time and preserved in collections in the British Library and Cambridge. Some appear much larger than a handspan, for example, up to the size of a truck tire in one case. Just to add to the frustrations of those wishing to understand them, details on the appearance and behavior of these balls vary significantly. There's no shortage of speculation over the physical nature of these bright spheres, from the more mundane explanation of blobs of plasma accumulating on insulated surfaces, to the more wild suggestions of refractive bubbles of trapped photons. While commonly seen during thunderstorms, they appear less like massive, explosive flashes and more like silent, grapefruit-sized, glowing spots that drift around for a handful of seconds before blinking out of existence. If we go by eyewitness accounts, ball lightning seems like a misnomer. Nonetheless, it just might be the earliest convincing mention of a mysterious meteorological phenomenon in English history. A number of models considered allow us to study the nature of ball lightning in detail.The observation – recorded by the Benedictine monk Gervase of Christ Church Cathedral Priory in Canterbury, England – is unlikely to be a first-hand account, and is otherwise light on detail. The glowing of ball lightning is created by many thermal waves that propagate along separate fibers, use the surface energy of the structure, and form glowing hot zones with a temperature of about 2000 K. The best model resembling the ball lightning structure is a knot of fractal fibers. According to this analysis, the substance composing ball lightning has a sparse fractal structure, similar to an aerogel, with the density of a gas and the behavior of a solid or liquid. ![]() The mechanical, gas-dynamical, energetic radiative and electrical processes of ball lightning are analyzed on the basis of such analogs and recent scientific information. ![]() Ball lightning is a many-sided phenomenon, and therefore has a number of analogs which are related to its separate properties and which can be modeled. The analysis leads to the conclusion that ball lightning has a rigid skeleton a spotted structure of its glowing follows from a large difference between the radiative and mean temperatures of the ball lightning. The experimental modeling of ball lightning as a whole is reviewed. The properties of ball lightning have been derived from a statistical treatment of thousands of observations. An up to date description of the state of the ball lightning problem is given.
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