They don't. Few, if any volcanoes in the world do. The volcanoes, especially at subduction zones, will often go dormant for years and even centuries without erupting.
The volcanoes that erupt both ways are located on or near boundaries between oceanic and continental crust over subduction zones.
Volcanoes erupt infrequently more destructive and active than volcanoes that erupt continuously because the volcano that didn't erupt in a while had more pressure than the volcano that erupts constantly. When more pressure builds up, gas wants to get out as soon as possible. When it does, the magma comes out, it pushes and pushes out since all thee pressure builded up.
Volcanoes can erupt at any time, regardless of whether it is day or night. The frequency of eruptions is not directly influenced by the time of day. Eruptions are generally monitored continuously, regardless of the time.
No, oceanic crust hot spot volcanoes tend to erupt with less explosiveness compared to subduction zone volcanoes. The lava from hot spot volcanoes is typically less viscous, allowing gases to escape easily and reducing the likelihood of explosive eruptions.
Cone volcanoes which are likely to erupt explosively are found at subduction zones. Spreading zones (constructive plate boundaries) and hot spots produce quieter volcanoes because their lava is thinner. The ones at hot spots are shield volcanoes.
The volcanoes that erupt both ways are located on or near boundaries between oceanic and continental crust over subduction zones.
Subduction.
Volcanoes erupt infrequently more destructive and active than volcanoes that erupt continuously because the volcano that didn't erupt in a while had more pressure than the volcano that erupts constantly. When more pressure builds up, gas wants to get out as soon as possible. When it does, the magma comes out, it pushes and pushes out since all thee pressure builded up.
Volcanoes can erupt at any time, regardless of whether it is day or night. The frequency of eruptions is not directly influenced by the time of day. Eruptions are generally monitored continuously, regardless of the time.
No, oceanic crust hot spot volcanoes tend to erupt with less explosiveness compared to subduction zone volcanoes. The lava from hot spot volcanoes is typically less viscous, allowing gases to escape easily and reducing the likelihood of explosive eruptions.
Cone volcanoes which are likely to erupt explosively are found at subduction zones. Spreading zones (constructive plate boundaries) and hot spots produce quieter volcanoes because their lava is thinner. The ones at hot spots are shield volcanoes.
Volcanoes that erupt both explosively and effusively are typically located along tectonic plate boundaries, known as subduction zones. Examples include stratovolcanoes in the Ring of Fire in the Pacific Ocean, like Mount St. Helens in the United States and Mount Merapi in Indonesia. These volcanoes can have both explosive eruptions, ejecting ash and lava, as well as effusive eruptions with flowing lava.
Volcanoes supplied by subduction zones usually erupt due to buildup of pressure of these gases. This lava tends to erupt explosively as solid pieces of ash, cinders, bombs, etc. often filled with gas bubbles. Volcanoes supplied by deep mantle hotspots have almost no gas in their lava and erupt due to buildup of magma rising from the hotspot. This lava tends to erupt quietly as a fluid.
No. Volcanoes erupt.
Some volcanoes lie over 'hot spots' in the Earth's mantle where molten material is continuously being produced and injected through the crust. Other types of volcanoes are produced from the subduction processes of tectonic plate collisions where magma pressure builds, erupts, then builds again in a cycle of sorts.
About 60 volcanoes erupt each year.
An unlimited amount of volcanoes can erupt at once