Download Ball lightning : an unsolved problem in atmospheric physics by Mark Stenhoff PDF

By Mark Stenhoff

Down comes a deluge of sonorous hail, Or prone-descending rain. Wide-rent, the clouds Pour an entire flood, and but, its flame unquenched, Th’unconquerable lightning struggles via. Ragged and fierce, or in purple whirling balls, And fires the mountains with redoubled rage. Black from the stroke, above, the smould’ring pine Stands a tragic shattered trunk; and, stretched lower than, a dull crew the blasted livestock lie. James Thompson, “The Seasons” (1727) were investigating ball lightning for greater than twenty years. I released a ball lightning file in Nature in 1976 that bought around the world exposure and that i as a result many of us wrote to me with debts in their personal reports. inside of a truly short while, I had amassed approximately two hundred firsthand bills, and the dossier has persisted to develop gradually when you consider that then. a number of issues inspired me. Few of these who wrote to me had any particular foreknowledge of ball lightning on the time in their statement. still, as soon as reviews of different phenomena similar to St. Elmo’s fireplace have been eradicated, the remainder descriptions have been remarkably constant. additionally, approximately all who contacted me have been prepared to have a proof of what that they had noticeable and appeared fullyyt honest

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Positive discharges are of particular interest because their maximum current and total charge transfer are usually much greater than that of more common –CG lightning. The largest recorded peak currents for CG lightning (200–300 kA) are due to return strokes of +CG lightning (Uman 1987). Positive flashes consist of a single stroke followed by a period of continuous current that is of a duration comparable to continuing currents in those –CG lightning flashes that have them (Uman 1987). Furthermore, +CG flashes have very broad frequency distributions, so that the highest measured values for these parameters are considerably higher than for –CG strokes or flashes.

At the end of that time the ball disappeared completely and instantaneously. . [My wife, who was in another room] did not see the ball but had been alarmed by a loud noise (she thinks perhaps a thunderclap) and then a “sizzling” or “crackling” noise like a wood fire burning or bacon frying [which] moved downward along the outside wall. She believes as well that she saw a flash outside the house as the sizzling/crackling sound was going on. . We searched the house both inside and outside for any signs of damage after the incident but found none.

We searched the house both inside and outside for any signs of damage after the incident but found none. (Lennox, D.

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