Characteristics
1. Ballistic Projectiles
2. Ash Fall
3. Pyroclastic Flows
4. Lava Flow
5. Volcanic Gases
6. Debris Avalance or
Volcanic landslide
7. Tsunami
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Characteristics
1. Ballistic Projectiles
2. Ash Fall
3. Pyroclastic Flows
4. Lava Flow
5. Volcanic Gases
6. Debris Avalance or
Volcanic landslide
7. Tsunami
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Answer:
1.Ballistic projectiles are rocks that an erupting volcano may hurl into the air. These blocks and bombs travel like cannonballs and usually land within 2km of the vent (but can travel as far as 5km, or even further, if the eruption is very explosive.)
2.When a volcano erupts, it will eject a wide variety of material into the air above it (called pyroclastic fall). The large fragments of material, 0.1 to 10 metres in diameter, rarely land more than 1-2 km from the vent.
3.A pyroclastic flow is a dense, fast-moving flow of solidified lava pieces, volcanic ash, and hot gases. It occurs as part of certain volcanic eruptions. A pyroclastic flow is extremely hot, burning anything in its path. It may move at speeds as high as 200 m/s. Pyroclastic flows form in various ways.
4.A lava flow is a moving outpouring of lava created during a non-explosive effusive eruption. When it has stopped moving, lava solidifies to form igneous rock. The term lava flow is commonly shortened to lava.
5.The principle components of volcanic gases are water vapor (H2O), carbon dioxide (CO2), sulfur either as sulfur dioxide (SO2) (high-temperature volcanic gases) or hydrogen sulfide (H2S) (low-temperature volcanic gases), nitrogen, argon, helium, neon, methane, carbon monoxide and hydrogen.
6.A debris avalanche is the sudden catastrophic collapse (landslide) from an unstable side of a volcano. Many volcanic cones are steep sided and unstable due to rapid growth of the cone. Avalanched material follows valleys as it moves down the side of the volcano under the force of gravity.
7.A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions.But as the waves travel inland, they build up to higher and higher heights as the depth of the ocean decreases. The speed of tsunami waves depends on ocean depth rather than the distance from the source of the wave.
Explanation: