Vents may consist of a single, circular-shaped structure, a large elongated fissure or fracture (as seen on the diagram above) or a tiny ground crack. Nyiragongo is notorious for releasing large ...

Lava began flowing from a new fissure vent that opened from east to west within the volcano's Nāpau Crater early Tuesday morning, the USGS said. The eruption continued throughout the day on ...

Volcanic vents, or fissures, have cracked open across the area and gobbled up dozens of homes and vehicles. The eruption came after hundreds of earthquakes jarred the island’s eastern side.

Volcanic vents, or fissures, have cracked open across the area and gobbled up dozens of homes and vehicles. The eruption came after hundreds of earthquakes jarred the island’s eastern side.