How come the verhehrenden damage from lightning strikes?
A lightning discharge involves several steps. A very high, short-term surge current flows during the main discharge of the struck object. in millionths of a second range of surge current rises to its maximum value of some 10 000 amperes and sounds then in less than thousandth of a second again from. Often it is also to multiple discharges (lightning part) of lightning discharges. They are created by the fact that after a break of a few ten-thousandths to a few thousandth seconds in the still highly conductive lightning channel of the main discharge, a new Leitblitz to earth moves. Which is then followed by partial discharge has a renewed surge current of the struck object result. Measurements have been registered up to 40 such consecutive flashes of what is sometimes visually by the flickering of the lightning makes noticeable. Sometimes one can observe that connects to a power surge or a so-called tail current with some 100 amps, which is about the current corresponds to the electric welding.
Finds the lightning current at its point of impact no electrically conductive path to ground particularly well, he can heat penetrated the materials he or adjacent items so strong that the ignition temperature is reached, thus creating a fire or even an explosion takes place. Especially light can ignite naturally, for example, Reed roofs, storage of hay, straw or paper, and explosive materials in solid, liquid or gaseous form.
flashes with great blow power to choose their path often wet components (chimneys, roofs, walls) or by columns in trees, where explosive water vapor is formed. This not only wood beams, tile or stone fireplace, but entire roof and wall parts are damaged or destroyed, without any internal fire. This is called a non-igniting the cold or lightning.
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