Lightning in volcanic ash
If a volcanic eruption is not impressive enough already, try seeing it when lightning is involved. Normally ash and dust are electrically neutral. However, when the two elements are emanating from a volcano they are (obviously) very hot, and can have positively and negatively charged ions. These in turn cause electric and magnetic fields, with the result that the positively and negatively charged ions separate from each other. This process can then add severe lightning to a volcanic ash cloud.
Photographer Steve Winter is used to working in tough terrain. But the urban jungle—Griffith Park, in central Los Angeles—has its own challenges, as he... More Photographer Steve Winter is used to working in tough terrain. But the urban jungle—Griffith Park, in central Los Angeles—has its own challenges, as he learned while trying to photograph an elusive big cat that calls the park home. Read the article, and see more photos, online in National Geographic magazine: http://ngm.nationalgeographic.com/2013/12/cougars/chadwick-text. National Geographic Photo Engineering and Remote Engineering contributed to the assignment.
Date 13-12-05, Duration 2:00, Views 16224
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