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An observer is estimate the distance for the strike because of the timing the brand new period between your visible super and the clear thunder it creates. Light journey at about 3 hundred,000,000 meters/s (980,000,100 foot/s), while you are voice only trip thanks to air around 343 m/s (step 1,130 ft/s). Anecdotally, there are many types of somebody explaining a great 'storm individually overhead' otherwise 'all-around' but 'zero thunder'. Lightning in the a sufficient point can be viewed and never heard; there is certainly research you to definitely a lightning violent storm is visible in the more than 160 contact $1 deposit kilometres (100 miles) whereas the newest thunder travel from the 32 kilometres (20 miles). Since the voice surf propagate perhaps not from a single section resource but across the amount of the newest super's street, the fresh voice source's varying distances in the observer is make a going or rumbling impression.

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