Ground Truth: A Positive Cloud-to-Ground Lightning Flash
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We describe the circumstances and effects of a cloud-to-ground lightning flash that lowered positive charge and struck a residential home near Albany, New York. The characteristics of the flash were detected and recorded by a wide-band magnetic direction-finding system operating along the East Coast. The flash contained one stroke, had an estimated peak current of 70 kA and was apparently the only ground flash in the storm. A 70 mm2 hole in a section of iron roof flashing suggests that the charge transfer may have been between 25 and 150 coulomb. -from Authors