how to measure lightning distance
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how to measure lightning distance
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how to measure lightning distance, how to measure lightning distance by thunder, how to measure distance of lightning by sound, how to tell distance of lightning, how to measure lightning, how to calculate lightning distance, how to estimate distance of lightning, how to determine how far lightning is, how to tell lightning distance miles, how to count the distance of lightning, how to calculate how far lightning is, how to tell how far lightning is, how is lightning measured
