Check out our destinations and tours!
Follow us:
FacebookTwitterGoogle PlusYouTube

Support us?


Maintaining the volcano and earthquake news sections on this website, the free Volcano Webcams tool and interactive map widget is a free-time, both time- and server cost intensive effort.
If you find the information useful and would like to support us, and help keep it alive and improve it, please consider making a small donation. Thank you!

Illustrated Volcano Glossary

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 / USGS
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 / USGS
During 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... -> See whole entry

Related keywords (1):

lava fountain

hornito

Volcanology
Erupting hornito on Kilauea volcano (Hawaii)
Erupting hornito on Kilauea volcano (Hawaii)
Erupting hornito on Etna volcano (Italy)
Erupting hornito on Etna volcano (Italy)
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... -> See whole entry

Related keywords (1):

Ambrym

More on VolcanoDiscovery:

Comments:

Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Text and images on this webpage are copyrighted. Further reproduction and use without authorization is not consented. If you need licensing rights for photographs, for example for publications and commercial use, please contact us.