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This long-exposure photograph (left) shows a triggered lightning event. Image Courtesy of University of Florida, Florida Institute of Technology, and Southwest Research Institute This long-exposure photograph (left) shows a triggered lightning event. The initial copper wire burn glows green, while nine subsequent return strokes are more purplish. Southwest Research Institute scientists plotted acoustic data (right) measured at the
Image Courtesy of University of Florida, Florida Institute of Technology, and Southwest Research Institute