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Why in some areas mudflows have followed rivers and in other areas mudflows have spread out?
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Some volcanoes have glaciers on top which may melt causing what type of hazard?
The glaciers may melt and mix with volcanic ash, forming mudflows called lahars.
What was the cause of deaths in nevado del ruiz in 1985?
Around 2,500 deaths were caused by the most serious eruption of the Nevado del Ruiz volcano in 1985. The town of Armero was covered in a mass of mud and debris (or lahar) which the volcano produced.
What are some ways you can pervent and slow down mudflows?
Planting vegetation, building retaining walls, creating diversion channels, and constructing debris basins are effective ways to prevent and slow down mudflows. It is also important to properly manage land use practices in areas prone to mudflows to minimize the risk of erosion and sedimentation.
What are the fastest forms of mass wasting?
Some of the fastest forms of mass wasting include rockfalls, debris flows, and lahars. Rockfalls involve the rapid freefall of rocks down a slope, debris flows are fast-moving mixtures of rock, soil, and water that flow downslope like a fluid, and lahars are volcanic mudflows that can travel at high speeds down volcano slopes.
Are lahars hot?
Lahars are typically a mix of water, volcanic ash, and debris that flow down the slopes of a volcano during an eruption. While they can be very destructive due to their speed and volume, lahars are not typically hot like lava flows.
What are some less hazards from volcanic eruption?
The only effective method of risk mitigation is evacuation prior to such eruption from areas likely to be affected by pyroclastic flows. 5 - Lahars ( volcanic mud and debris flows) are a common major volcanic hazard for people and property. Laharslikewise proceed very quicky and possess great destructive power.
What can ash do?
Volcanic ash can have a variety of effects. In some eruptions it can fall like snow, but with different effects. The silica in the ash can be toxic to plants and animals. The weight of the ash can bring down trees and collapse roofs. Large areas can be buried. Over the long term, however, volcanic ash, once weathered, makes very fertile soil. Volcanic ash is also harmful when inhaled and can damage the eyes and lungs. It can clog the engines of cars and aircraft, and can bring down planes in flight. In some eruptions, superheated clouds of ash and gas called pyroclastic flows race down the slopes of a volcano. Anything living caught in such a flow will burn to death. When ash mixes with rain or melted snow and ice it can form mudflows called lahars. These lahars behave like floods, but are denser and more destructive, burying the areas where they come to rest in hardened mud. Lahars can fill in stream beds as well, causing floods.
What are some volcano dangers?
Some volcano dangers include lava flows, pyroclastic flows, ashfall causing respiratory issues and damage to infrastructure, lahars (mudflows), and volcanic gases such as sulfur dioxide that can cause health problems. It's important to stay informed and follow evacuation orders during volcanic eruptions to stay safe.
What are some common features seen in disaster affected areas?
distruction distruction distruction
How did the nevado del ruiz volcano effect animals?
The Nevado del Ruiz volcano, which erupted in 1985, had devastating effects on local wildlife. The eruption and subsequent lahars (volcanic mudflows) destroyed habitats, leading to significant loss of animal life and displacement of species. Many animals either perished in the eruption or were forced to flee to safer areas, resulting in disruptions to local ecosystems. The long-term impacts on biodiversity and animal populations in the region have been profound, with some species struggling to recover.
What is it like after an eruption?
After an eruption, there can be widespread devastation, including destruction of property, loss of life, and environmental damage. The landscape may be altered with ash covering the ground, and there can be ongoing hazards such as lahars (mudflows), pyroclastic flows, and toxic gases. Recovery efforts can take years or even decades.
