In this type of eruption, the magma blasts into the air and breaks apart into pieces called tephra Tephra can range in size from tiny particles of ash to house-size boulders Explosive volcanic eruptions can be dangerous and deadly They can blast out clouds of hot tephra from the side or top of a volcano
What are three things that can occur during an eruption?
In an eruption, gases and rock shoot up through the opening and spill over or fill the air with lava fragments Eruptions can cause lava flows, hot ash flows, mudslides, avalanches, falling ash and floods
What happens during an explosive eruption?
In volcanology, an explosive eruption is a volcanic eruption of the most violent type Such eruptions result when sufficient gas has dissolved under pressure within a viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent
What are 5 interesting facts about volcanoes?
Top 10 Facts About Volcanoes Volcanoes are openings of the Earth’s surface The word volcano comes from the word ‘vulcan’ Volcanoes can be active, dormant or extinct The liquid inside the volcano is called magma Lava is the liquid that is expelled from the volcano Lava is very, very hot!
What are the things to do during volcanic eruption?
IF YOU ARE UNDER A VOLCANO WARNING: Listen for emergency information and alerts Follow evacuation or shelter orders Avoid areas downstream of the eruption Protect yourself from falling ash Do not drive in heavy ash fall
What controls the violence of an eruption?
The amount of dissolved gas in the magma provides the driving force for explosive eruptions The viscosity of the magma, however, is also an important factor in determining whether an eruption will be explosive or nonexplosive
What causes a volcano to erupt violently?
A volcano’s explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions
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
What happens when a volcano erupts ks2?
When a volcano erupts, magma comes up and out through the vents Magma is called lava when it’s outside the volcano Depending on how thick the magma is, volcanoes can be different shapes such as shield, composite or dome Ash from volcanoes is very good for growing things
How do you make a volcano erupt for kids?
Combine the vinegar, water, dish soap and 2 drops of food coloring into the empty soda bottle Use a spoon to mix the baking soda slurry until it is all a liquid Eruption time! … Pour the baking soda slurry into the soda bottle quickly and step back!
What are the effects of volcanic eruption?
Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive People have died from volcanic blasts Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires
How will you describe a volcano?
A volcano is defined as an opening in the Earth’s crust through which lava, ash, and gases erupt The term also includes the cone-shaped landform built by repeated eruptions over time
How hot is lava from a volcano?
The temperature of lava flow is usually about 700° to 1,250° Celsius, which is 2,000° Fahrenheit Deep inside the earth, usually at about 150 kilometers, the temperature is hot enough that some small part of the rocks begins to melt Once that happens, the magma (molten rock) will rise toward the surface (it floats)
What will you do during and after volcanic eruption?
What to do after a volcanic eruption Listen to your local radio stations for civil defence advice and follow instructions Stay indoors and away from volcanic ashfall areas as much as possible When it is safe to go outside, keep your gutters and roof clear of ash as heavy ash deposits can collapse your roof
What are the don’ts during volcanic eruption?
Top 10 Don’ts When You’re Caught in a Volcanic Eruption #10:Don’t panic #9:Don’t run outside immediately #8:Don’t forget your skin #7: Don’t wear contacts #6: Don’t ignore your breathing #5: Don’t act alone #4: Don’t act in haste #3:Don’t stay too long under that roof
What should you do before during and after a volcanic eruption?
Wear protection Use masks, glasses/goggles, long sleeves, pants, and shoes when clearing out ash to protect your lungs, skin and eyes Clean your gutters and roof with water after clearing out the ash to prevent corrosion Wait for further announcements from LGUs or national news related to the volcanic eruption
How do you tell if a volcano will erupt?
How can we tell when a volcano will erupt? An increase in the frequency and intensity of felt earthquakes Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground Subtle swelling of the ground surface Small changes in heat flow Changes in the composition or relative abundances of fumarolic gases
What type of eruption is the most explosive?
A Plinian eruption is the most explosive of the eruption types Mt St Helens eruption was a plinian eruption
What is quiet eruption?
Quiet Eruptions Volcanoes that have very hot, low-silica magma generally erupt quietly In a quiet eruption, lava erupts in a stream of low-viscosity lava, called a lava flow Lava flows from a quiet eruption can travel for great distances
How long do explosive eruptions last?
According to the catalog “Volcanoes of the World” by Smithsonian Institution volcanologists Tom Simkin and Lee Siebert, 9 percent of eruptions end in less than one day, 16 percent within two days, 24 percent within one week, 30 percent within two weeks, 43 percent within a month, 53 percent within two months, 83 Jan 7, 1999
What type of volcano has violent explosive eruptions?
Composite volcanoes are some of the most dangerous volcanoes on the planet They tend to occur along oceanic-to-oceanic or oceanic-to-continental boundaries because of subduction zones They tend to be made of felsic to intermediate rock and the viscosity of the lava means that eruptions tend to be explosive
What type of lava is explosive?
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