Types of Volcanic Eruptions
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- Lahar: Mudflows formed by volcanic ash, ice, and snow that flow into rivers and waterways.
- Rhyolite flow: Lava containing the volcanic form of granite (melted)
- Basalt flow: Lava with high contents of magma and iron that will later form basalt when it has been cooled.
- Pyroclastic flow: Hot ash that moves about quickly with fragments of volcanic rock and gas.
- Phreatic: An explosion of steam, water, ash and rock caused by the contact of magma with water belowground.
- Gaseous emissions:
Carbon dioxide is a form of greenhouse gas that causes global warming by damaging the ozone layer and allowing more radiation from the sun than we need onto the earth’s surface. Other gasses from volcano eruptions also cool earth’s global temperatures, creating what is called the Haze effect, and may cause acid rain to fall (sulphur dioxides).
- Rhyolite flow: Lava containing the volcanic form of granite (melted)
- Basalt flow: Lava with high contents of magma and iron that will later form basalt when it has been cooled.
- Pyroclastic flow: Hot ash that moves about quickly with fragments of volcanic rock and gas.
- Phreatic: An explosion of steam, water, ash and rock caused by the contact of magma with water belowground.
- Gaseous emissions:
Carbon dioxide is a form of greenhouse gas that causes global warming by damaging the ozone layer and allowing more radiation from the sun than we need onto the earth’s surface. Other gasses from volcano eruptions also cool earth’s global temperatures, creating what is called the Haze effect, and may cause acid rain to fall (sulphur dioxides).
DUN, DUN, DUNNNNN......
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After a volcanic eruption, the effects can be beneficial or destructive. This includes fire hazards, destruction caused by super hot magma, air poisoning to the lungs of infants, older adults and people with severe respiratory problems from the high temperature lava and heavy ash, and sometimes a temporary (may last a few years) cooling of the atmosphere caused by the particles and ash from the volcanic eruption. On the good side, the particles and ash that spewed out of the volcano provides nutrients to the soil once they settle on the ground.
Scientists figure that about 200,000 lives have been lost due to volcanic eruptions within the last 500 years. Events such as the eruption of Mount Meager in BC more than 2,000 years ago– with the ash cloud spreading as far as southern Alberta– could cause the loss of many lives. Past studies also show Mount Baker may erupt again (time unknown) because it has not been classified as extinct, and show signs of activity for a possible eruption in the future.
Possible eruptions in the U.S. could affect us in terms of falling ash or bad weather conditions. Alaskan volcanoes (they’re part of the U.S. and the NAP) also have a higher chance of erupting than the volcanoes in BC.
Scientists figure that about 200,000 lives have been lost due to volcanic eruptions within the last 500 years. Events such as the eruption of Mount Meager in BC more than 2,000 years ago– with the ash cloud spreading as far as southern Alberta– could cause the loss of many lives. Past studies also show Mount Baker may erupt again (time unknown) because it has not been classified as extinct, and show signs of activity for a possible eruption in the future.
Possible eruptions in the U.S. could affect us in terms of falling ash or bad weather conditions. Alaskan volcanoes (they’re part of the U.S. and the NAP) also have a higher chance of erupting than the volcanoes in BC.
Positive Effects of Volcanoes:
-Scenery attracts tourists. -Provides nutrients for the soil. -If you live close to volcanoes, you can get geothermal energy. |
Negative Effects of Volcanoes:
-Lives can be lost. -Fast moving mudflows can be made. -Lava flows and/or lahars can demolish communities, settlements, woodlands, and agriculture. -Artificial and natural landscapes can be destroyed and changed forever. |