The lava flow from Kilauea Volcano crossed Apa'a Street near Cemetery Road, near the town of Pahoa on the Big Island of Hawaii, on Friday. The flow began June 27; residents in the flow path have now been told to prepare for a possible evacuation.
U.S. Geological Survey/AP
Smoke billows from Mount Tavurvur after an eruption in Kokopo, east New Britain, Papua New Guinea, on Friday. The eruption has caused some nearby residents to be evacuated and some flights to be rerouted.
Sicily's Mount Etna early this week, as seen from space. The bright red is lava. Snow is blue-green. Clouds are white. "Shortwave infrared, near infrared, and green light" combine to produce the colors.