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Effusive eruptions occur when hot, (1200oC) runny basalt magmas reach the surface. Dissolved gases escape easily as the magma erupts, forming lava that flows downhill quite easily. Effusive eruptions build up gently-sloping Shield Volcanoes like Hawaii.
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. These eruptions build up more steeply-sloping Composite volcanoes like this one in Chile.
What else can I help you with?
How many volcano's are non active?
1200
What is a non-active volcano called?
A shield volcano most commonly found at hot-spots and island chains such as Hawaii they have shallow flanks, a wide base, and runny lava which is frequently erupted, so it is non-explosive because there is little pressure build up
which of the characteristic of active volcano?
An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant. An erupting volcano is an active volcano that is having an eruption... A dormant volcano is an active volcano that is not erupting, but supposed to erupt again.
Is active or inactive volcano Taal Volcano?
Taal Volcano is an active volcano located in the Philippines. It is one of the most active volcanoes in the country and has had several eruptions in recent history, with the most recent one occurring in January 2020.
What is the difference between intermittent volcano and active volcano?
An intermittent volcano is one that erupts infrequently and unpredictably, with long periods of dormancy in between eruptions. An active volcano, on the other hand, is one that is currently erupting or showing signs of potential eruption in the near future.
What is the difference of a dormant volcano and a intermittent volcano?
A dormant volcano has been "non active for a while but may become active at any time. An intermittent volcano has either been non active for a longer or shorter period but I'm not sure which. They don't have a whole lot of difference.
How many volcano's are non active?
1200
What is the difference between a volcano and an active volcano?
one has an on and off switch and the other is a lever
What is a non-active volcano called?
A shield volcano most commonly found at hot-spots and island chains such as Hawaii they have shallow flanks, a wide base, and runny lava which is frequently erupted, so it is non-explosive because there is little pressure build up
What are the names of the most dangerous volcano?
a active volcano
which of the characteristic of active volcano?
An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant. An erupting volcano is an active volcano that is having an eruption... A dormant volcano is an active volcano that is not erupting, but supposed to erupt again.
What is the difference between active euthanasia and non-active euthanasia?
non active euthanasia is the same as assisted suiside :)active euthanasia is just plain old suiside :)
Is active or inactive volcano Taal Volcano?
Taal Volcano is an active volcano located in the Philippines. It is one of the most active volcanoes in the country and has had several eruptions in recent history, with the most recent one occurring in January 2020.
Antarcticas most active volcano?
Antarctica's most active volcano is Mt Erebus, the southernmost active volcano on earth.
What is the difference between intermittent volcano and active volcano?
An intermittent volcano is one that erupts infrequently and unpredictably, with long periods of dormancy in between eruptions. An active volcano, on the other hand, is one that is currently erupting or showing signs of potential eruption in the near future.
Is Mount St Helens an active volcano?
Yes it is an active volcano.
Is the city of naples near an active volcano?
it is next to an active volcano
