An image of Augustine erupting on January 13, 2006, from about 50 miles away from the volcano. Courtesy of Gerald Andrew When Mount St. Augustine in Alaska erupted in mid-January 2006 for the first ...

The dramatic volcanic eruption on a remote island in Indonesia's North Sulawesi province on April 17 threw a fiery-red column of lava, incandescent rock and ash as much as 3 km (2 miles) into the sky.

Volcanic eruptions tend to evoke images of flowing molten lava and giant ash plumes, but when an underwater volcano off Tonga began a major eruption on Jan. 13, it was accompanied by one of the ...