What do quiet eruptions result in

Eruptions occur when pressure inside the volcano increases, causing its molten liquid rock to shift and release its energy. These relatively tame eruptions are characterized by an outpouring of thin, liquid-like lava, as seen with many Hawaiian volcanoes.

Explosive eruptions occur where cooler, more viscous magmas such as andesite reach the surface. Dissolved gases cannot escape as easily, so pressure may build up until gas explosions blast rock and lava fragments into the air! Lava flows are much more thick and sticky so do not flow downhill as easily. Strombolian eruptions are often associated with small lava lakes, which can build up in the conduits of volcanoes.

They are one of the least violent of the explosive eruptions, although they can still be very dangerous if bombs or lava flows reach inhabited areas. A Vulcanian eruption is a short, violent, relatively small explosion of viscous magma usually andesite, dacite, or rhyolite.

This type of eruption results from the fragmentation and explosion of a plug of lava in a volcanic conduit, or from the rupture of a lava dome viscous lava that piles up over a vent. Magma that leaves a volcanos vent is called lava an eruption of ash cinders, bombs and gases from a volcano is called pyroclastic flow underground water heated by a nearby body of magma can spray from the ground under pressure forming a geyser The bowl shaped area around a volcanoes central vent is called crater.

Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Users' questions Which type of volcano has both explosive and quiet eruptions? Users' questions. Esther Fleming October 19, The tectonic setting that creates explosive eruptions is a subduction zone. Recent explosive eruptions include: Mt. Helens , Mt.

Pinatubo and Monserrat. The 4 drawings below illustrate how a high silica eruption occurs. Geology home. Igneous Rocks. Sedimentary Rocks. Metamorphic Rocks. Volcanoes Volcanic Eruptions Volcanic Landscapes. Volcanic Eruptions: Low Silica Magma is less dense than the surrounding rock and rises up to the surface through cracks and crevices under the Earth's surface causing an eruption of lava.

Magma with low silica content is very fluid and easily erupts onto the surface through cracks and crevices at the surface.