Helgi Hjorleifsson, a firefighter, is a leader in a national experiment to steer rivers of lava away from important sites.

The eruptions at Kilauea prompted closures at a national park and part of a highway because of falling glassy volcanic fragments, including ash.

Ethiopian volcano eruption: According to the Smithsonian Institution’s Global Volcanism Program, this volcano in Ethiopia has erupted for the first time in about 12,000 years. The eruption did not ...