0
What else can I help you with?
True or false A volcano can erupt by slowly oozing hot lava which flows down the sides?
True. Some volcanoes have a type of eruption called effusive eruption, where lava slowly oozes out and flows down the sides of the volcano. This type of eruption is typically less explosive than other types.
What factors determine how explosive the eruption of a volcano will be?
In a volcano, the higher the pressure rises before eruption takes place, the more explosive the eruption will be. Some volcanoes seem to be "gentle flow" as a matter of course (like Mauna Loa in Hawaii). Some seem to be explosive as a matter of course (like Vesuvius in Italy). Others manifest both types of eruptions.
What kind of eruption form composite cone volcano?
Composite volcanoes are highly variable in what they erupt. Most often, eruptions will release clouds of ash, pumice, and rock fragments. In some cases they fountain or extrude lava.
What are the stages of an eruption column?
An eruption column consists of hot volcanic ash emitted during an explosive volcanic eruption. An explosive eruption always begins with some form of blockage in the crater of a volcano When magma flows towards the surface pressure builds, eventually causing the blockage to be blasted out in an explosive eruption. The pressure from the magma and gases are released through the weakest point in the cone, usually the crater. The sudden release of pressure causes the gases in the magma to suddenly froth and create volcanic ash and pumice, which is then ejected through the volcanic vent to create the signature eruption column commonly associated with explosive eruptions.
Does Mount Etna have a explosive or nonexplosive eruption?
As of 2010, Popocatepetl is erupting. According to the Smithsonian National Museum of Natural History, continuous activity since Jan. 2005 has resulted in phreatic explosions, which occur when molten lava contacts water. In Popocatepetl's case the water inside the crater comes from the heat of the rising magma melting the glaciers on its peak.
Was mount Aso a quiet or explosive eruption?
There were 4 large eruptions of Mount Aso, from 300,000 BC to 90,000 BC. They were all very powerful, explosive eruptions. The last was the most powerful, probably as powerful as the Santorini eruption of c. 1620 BC, or some 4 times more powerful than that of Krakatoa in 1883.
Is mount Fuji an explosive volcano or a non-explosive volcano?
Mount Fuji is considered a stratovolcano, which means it has the potential for both explosive and non-explosive eruptions. Historically, it has exhibited explosive behavior, particularly during its last major eruption in 1707. However, eruptions can vary in intensity, and some eruptions may be non-explosive, characterized by lava flows rather than explosive ash clouds. Overall, while it has the capability for explosive eruptions, it can also produce less violent activity.
How long does it take for a volcano to collapse?
The time it takes for a volcano to collapse can vary significantly based on its size, structure, and the nature of the eruption. Some volcanoes may experience a rapid collapse during explosive eruptions, occurring within minutes to hours. Others may undergo gradual subsidence over days, weeks, or even years as magma is drained from beneath the surface. Geological factors and the specific eruption dynamics play crucial roles in determining the collapse timeline.
Type of vesuvius eruptions?
Like many other stratovolcanoes, Mount Vesuvius varies in its type of eruptions. Some eruptions are explosive, producing clouds of ash. Others are are effusive, producing lava flows. The famous eruption that buried Pompeii in the year 79 was a highly explosive Plinian eruption.
Why did the volcano outside of Pompeii erupt?
Mount Vesuvius erupted in 79 A.D. because this is what active volcanoes do. They continually smoulder and produce eruptions every few thousand years. Scientific research has shown that Mt Vesuvius was formed 25,000 years ago and was built up by a series of small lava flows and by some eruptions. Around 19,000 years ago, there was the beginning of large explosive eruptions (eruptions which involve explosions which throw volcanic ash in the air). A large explosive eruption which occurred 18,000 years ago created the mountain's current caldera (the cauldron-like feature at the top). This was followed by a series of non-explosive, but lava-producing eruptions. There was a large explosive eruption 11,000 years ago and three small explosive eruption 8,000 and 5,000 years ago and 3,800 years ago there was a large one. The explosion which buried Pompeii and Herculaneum in 79 A.D. was the last large explosive eruption of Mt Vesuvius. There will be further explosive eruptions in the distant future.
What was the damage on the ngauruhoe eruption?
The Ngauruhoe eruption in 1975 caused minor damage, mainly due to ash fall and lahars. Some infrastructure was affected, but there were no casualties. Despite its explosive nature, the damage was limited because the volcano was in a remote area of New Zealand.
What are some physical properties of magma from an explosive eruption?
Magma is a liquid form of rock beneath the surface of the planet. It has two properties, physical and chemical, you can notice if it is not the physical property of magma if it has the chemical properties of whatever it contains.
