Illustrated Volcano Glossary
Updated: Jul 3, 2022 03:24 GMT - Refresh
Hawaiian eruption
- Volcanology
Lava fountain more than 1,000 ft tall from Mauna Ulu, a vent of Kilauea Volcano in Hawaii, on 22 Aug 1969, a spectacular example of a Hawaiian eruption. Photo by D.A. Swanson, HVO / USGSDuring a Hawaiian eruption, very fluid, basaltic lava is erupted from the vent as lava fountains and forms lava flows. The fountains are driven by the expanding gasses that were contained in the magma and leave the vent as a jet. Such eruptions are common for hot-spot volcanoes such as Kilauea on Hawai'i.The lava fountains can reach heights of several hundreds meters, sometimes even more than 1 km. They can last for hours or even days and often occur from fissure vents to form so-called curtains of fire.
The lava spatter that falls back from the fountain can form lava flows if it is still fluid enough, or build up welded spatter ramparts and cinder cones around the vent. Along with the lava foun... Read allRelated keywords (1):
lava fountain hornito
- Volcanology
Erupting hornito on Kilauea volcano (Hawaii)Hornito (Spanish) = "Little oven".
Volcanic hornitos are small (usually a few meters high) rootless spatter cones that form on the surface of a (usually basaltic pahoehoe) lava flow. A hornito develops when lava is forced up through an opening in the cooled surface of a flow (a skylight) and then accumulates around the opening. Typically, hornitos are steep sided and form conspicuous pinnacles o... Read allRelated keywords (1):
Ambrym
