A scientific expedition in the summer of 2010 descended into the crater of Nyiragongo in the Virunga Mountains of eastern DRC. Nyiragongo is the home of the largest open lava lake in the world and the volcano whose 2002 eruption covered a portion of the city of Goma (including a large part of its airport). Nyiragongo's proximity to Lake Kivu prompted fear of a Lake Nyos-like explosion that could affect nearly a million people.
Photographer Olivier Grunewald captured a number of spectacular images that have been published on The Big Picture at www.boston.com.
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