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<br /> <br />// <br /> <br />/ <br /> <br />/ <br /> <br /> <br />I <br /> <br />I <br /> <br />5 sec <br /> <br />t <br />4100 metres <br /> <br />20~c <br /> <br />Path of growl <br />or whistle <br /> <br />3400 metres <br /> <br />I <br />I <br /> <br /> <br />n,",..:',.;','", <br /> <br />;,\:,,", :~,,~ ";:" ;""~'-:\l\;;'_':~~ :~':. ';~. ~:;. ~';:'~Tr~:Si~:.;~~~~f~r.~;~Y:~t\\~j:lr:~:~;(!~~t~i~~ ~};~:~"::';.5~/~t~:;:,:~~~~~::: ~;~;;';:\; "~i:::!\;!;l:1;~;:~::j~~~::;:~;;:~-::;;~i; ;,::t~~;;;;Lt:i_:~:~;;'::'.::~ ;..." <br /> <br /> <br />1700 m~ <br /> <br />audible <br />range <br /> <br /> <br />The whistle continues for 30 seconds, therefore the shock wave <br />has reached 4 km and is still strong. <br /> <br />Penetration of Shockwave into Cloud <br />Copyright ~ 1994 ' <br /> <br />14 <br />