German photographer Martin Rietze travels around the world every year to capture the most stunning, breathtaking places on Earth, from the peaks of the Swiss Alps to the deserts of Namibia.
Rietze's specialty lies in photographing volcanoes, especially those about to erupt or actively erupting. He has (literally) written the book on the subject -- he's the author of a German volume on what he calls "extreme photography," which detail how to photograph natural phenomena, and has also published a pair of books on the geological background of volcanoes.
In January, he traveled to southern Kyushu in Japan to photograph the Sakurajima volcano as it ejected smoke, fire and lava bombs from its mouth, including a lightning show that lasted for some 20 seconds.
Why volcanic eruptions create lightning is unclear, Rietze told NASA in his brief essay for the photos -- possible causes range from electrically-charged catapulting magma bubbles or volcanic ash, to charge-inducing collisions in volcanic dust.
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