- 1 What type of lava is produced by volcanoes?
- 2 What type of volcano is Mt Agung?
- 3 What type of lava is associated with violent eruptions?
- 4 Do cone volcanoes have thick or thin lava?
- 5 What are the 3 types of volcano?
- 6 What is the most dangerous type of volcano?
- 7 Why is Mount Agung so dangerous?
- 8 How many volcanoes erupted in 2020?
- 9 How many people have died from Mount Agung?
- 10 What are the 7 types of volcanoes?
- 11 Is Lava found inside a volcano?
- 12 Do volcanoes erupt without warning?
- 13 What is the most powerful type of volcano?
- 14 What is the least explosive type of volcano?
- 15 What are the 4 types of volcanoes?
What type of lava is produced by volcanoes?
Most shield volcanoes are formed from fluid, basaltic lava flows. Mauna Kea and Mauna Loa are shield volcanoes. They are the world’s largest active volcanoes, rising over 9 km above the sea floor around the island of Hawai’i.
What type of volcano is Mt Agung?
Mount Agung or Gunung Agung is a active volcano in Bali. This stratovolcano is the highest point on the island. It dominates the surrounding area influencing the climate.
What type of lava is associated with violent eruptions?
Explosive eruptions are favored by high gas content & high viscosity magmas (andesitic to rhyolitic magmas). The explosive bursting of bubbles fragments the magma into clots of liquid that cool as they fall through the air. These solid particles become pyroclasts or volcanic ash.
Do cone volcanoes have thick or thin lava?
Shield cones are very low and very broad shaped volcanoes. These volcanoes erupt many times over the same area forming huge, and thick lava plateaus. The lava that flows from both types of eruptions is very hot, thin, and runny which allows for fast flowing lava flows.
What are the 3 types of volcano?
There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes ), and shield volcanoes. Figure 11.22 illustrates the size and shape differences amongst these volcanoes. Shield volcanoes, which get their name from their broad rounded shape, are the largest.
What is the most dangerous type of volcano?
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.
Why is Mount Agung so dangerous?
During the last eruption, most victims were killed by pyroclastic flows. Those are hot clouds of gases, ash and rock debris that race down the flanks of the mountain. They pose the biggest threat. It’s an unbelievably fast event: The pyroclastic streams reach speeds of several hundred kilometers per hour.
How many volcanoes erupted in 2020?
There were 73 confirmed eruptions at some point during 2020 from 68 different volcanoes; 27 of those were new eruptions that started during the year.
How many people have died from Mount Agung?
On March 17, the volcano erupted (VEI 5), sending debris 8 to 10 km into the air and generating massive pyroclastic flows. These flows devastated numerous villages, killing an estimated 1,100–1,500 people.
What are the 7 types of volcanoes?
What are the Different Types of Volcanoes?
- Cinder Cone Volcanoes: These are the simplest type of volcano.
- Composite Volcanoes: Composite volcanoes, or stratovolcanoes make up some of the world’s most memorable mountains: Mount Rainier, Mount Fuji, and Mount Cotopaxi, for example.
- Shield Volcanoes:
- Lava Domes:
Is Lava found inside a volcano?
When geologists refer to magma, they’re talking about molten rock that’s still trapped underground. If this molten rock makes it to the surface and keeps flowing like a liquid, it’s called lava. Magmas vary in their chemical composition, which gives them—and the volcanoes that contain them—different properties.
Do volcanoes erupt without warning?
Most volcanoes provide warnings before an eruption. Magmatic eruptions involve the rise of magma toward the surface, which normally generates detectable earthquakes. It can also deform the ground surface and cause anomalous heat flow or changes in the temperature and chemistry of the groundwater and spring waters.
What is the most powerful type of volcano?
A supervolcano must erupt more than 1,000 cubic km (240 cubic miles) of material, compared with 1.2 km3 for Mount St. Helens or 25 km3 for Mount Pinatubo, a large eruption in the Philippines in 1991. Not surprisingly, supervolcanoes are the most dangerous type of volcano.
What is the least explosive type of volcano?
Shield volcanoes tend to be the least explosive volcanoes.
What are the 4 types of volcanoes?
Geologists usually group volcanoes into four main types: cinder cones, composite volcanoes, shield volcanoes, and lava domes.