Volcanic eruptions can be explosive
, sending ash, gas and lava high up into the atmosphere, or the magma can form lava flows, known as effusive eruptions. Whether an eruption is explosive or effusive largely depends upon the amount of gas in the magma.
Why are some volcanoes not explosive?
Some volcanic eruptions are explosive and others are not. The explosivity of an eruption depends on the composition of the magma. If magma is thin and runny, gases can escape easily from it. … Pressure builds up until the gases escape violently and explode.
Which volcanoes tend to not have explosive eruptions?
Shield volcanoes
What type of volcano rarely explodes?
Shield Volcanoes
:
These volcanos build up slowly over time, with hundreds of eruptions, creating many layers. They're not likely to explode catastrophically. Perhaps the best known shield volcanoes are the ones that make up the Hawaiian Islands, especially Mauna Loa and Mauna Kea.
What is the most explosive volcano type?
Because they form in a system of underground conduits,
stratovolcanoes
may blow out the sides of the cone as well as the summit crater. Stratovolcanoes are considered the most violent.
What is the most destructive volcano?
| Eruption Year Casualties | Mount St. Helens , Washington 1980 57 3 | Kilauea, Hawaii 1924 1 1 | Lassen Peak, California 1915 0 4 | Mount Vesuvius, Italy 79 A.D. 3,360 2 |
|---|
Where is the largest active volcano in the world?
Rising gradually to more than 4 km (2.5 mi) above sea level,
Hawaii's Mauna Loa
is the largest active volcano on our planet.
Which volcanoes are more likely to explode thick or thin lava?
Shield volcanoes
spew lava that is comparatively thinner and runnier than stratovolcanoes. The result is that gas can more easily escape, so their eruptions tend to be less dramatic.
What are the 3 types of volcano?
Individual volcanoes vary in the volcanic materials they produce, and this affects the size, shape, and structure of the volcano. There are three types of volcanoes:
cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes
.
What is the 22 active volcanoes in the Philippines?
| Item No. Name of Volcano Province | 19 Musuan (Calayo) Bukidnon in Mindanao | 20 Parker South Cotobato/General Santos/ North Cotabato/Sarangani Provinces in Mindanao | 21 Pinatubo Boundaries of Pampanga, Tarlac and Zambales in Luzon | 22 Ragang Lanao del Sur and Cotobato in Mindanao |
|---|
What are the 7 types of volcano?
The result is the classic cone shape of composite volcanoes. A cross section of a composite volcano reveals alternating layers of rock and ash: (1) magma chamber, (2) bedrock, (3) pipe, (4) ash layers, (5) lava layers, (6) lava flow,
(7) vent, (8) lava, (9) ash cloud
.
What would a non explosive eruption look like?
Non-explosive type eruptions mostly produce various types of lava, such as a'a,
pāhoehoe and pillow lavas
. Some signs that a volcano may soon erupt include earthquakes, surface bulging, gases emitted as well as other changes that can be monitored by scientists.
How many craters does Taal volcano have?
The island consists of different overlapping cones and craters, of which
forty-seven
have been identified. Twenty six of these are tuff cones, five are cinder cones, and four are maars.
What is the least explosive type of volcano?
Shield volcanoes
tend to be the least explosive volcanoes. Most of the material they produce is lava, rather than the more explosive pyroclastic material.
Can one volcano trigger another?
There is no definitive evidence
that an eruption at one volcano can trigger an eruption at a volcano that's hundreds of kilometers/miles away or on a different continent. … Volcanoes that share common magma reservoirs can sometimes trigger unrest at each other.
What is the most powerful volcano on Earth?
The explosion of
Mount Tambora
is the largest ever recorded by humans, ranking a 7 (or “super-colossal”) on the Volcanic Explosivity Index, the second-highest rating in the index.
