Lahar is an outflow of mud, rock and other pyroclastic material from a volcano which mixes with water as it proceeds down a river valley . Essentially it is a mudflow or landslide resulting from volcanic action, usually very fast moving and destructive. In some cases it can be more destructive than the actual volcanic eruption.
Lahars look and behave like flowing debris, and concrete, (also ash) and their impact destroys most man made structures. Mt Rainer had lahars that traveled at 70/80 km/h at depths of 30 meters or more.
brilliantly colored sunrises and sunsets
A torrential mudflow of wet volcanic debris is typically called a volcanic lahar. These lahars can be extremely destructive and occur when a volcanic eruption melts snow and ice, or mixes with water from heavy rainfall. They can move rapidly down slopes and valleys, carrying debris and posing serious hazards to communities in their path.
About 300 people were killed in the 1991 Mount Pinatubo lahar disaster in the Philippines. The lahar, which is a type of volcanic mudflow, was triggered by the eruption of Mount Pinatubo. It caused widespread destruction in the surrounding areas.
The most deaths in the 1985 Armero tragedy in Colombia were caused by a combination of the eruption of the Nevado del Ruiz volcano, which triggered a large mudslide known as a lahar, engulfing the town of Armero and surrounding areas. The lahar buried thousands of people and led to the majority of the fatalities.
The tambora is famous for being the volcano responsible for the largest eruption in recorded history. The eruption in 1815 had widespread effects on global climate, leading to the "Year Without a Summer" in 1816.
brilliantly colored sunrises and sunsets
Landslide commonly occur during the year or after a Lahar or just after a Volcanic Eruption
A torrential mudflow of wet volcanic debris is typically called a volcanic lahar. These lahars can be extremely destructive and occur when a volcanic eruption melts snow and ice, or mixes with water from heavy rainfall. They can move rapidly down slopes and valleys, carrying debris and posing serious hazards to communities in their path.
Lahars are the result of volcanic ash mixing with large amount of water. They can form in two ways. In some cases an erupting volcano can melt snow and ice near its summit. The resulting meltwater mixes with the ash and forms a lahar. A lahar can also occur without an eruption if heavy rain falls on ash deposits.
About 300 people were killed in the 1991 Mount Pinatubo lahar disaster in the Philippines. The lahar, which is a type of volcanic mudflow, was triggered by the eruption of Mount Pinatubo. It caused widespread destruction in the surrounding areas.
Cotopaxi volcano is in Ecuador. A volcano magma can be measured during and after volcano eruption. The Cotopaxi eruption in 1987, its lahar has travelled for 60 miles.
Lahars can occur anytime there is a volcanic eruption or when large amounts of rainfall or snowmelt mix with volcanic debris on a slope. Their frequency varies depending on the volcanic activity and local weather conditions, but they can happen during or after an eruption. Monitoring volcanic activity and having early warning systems in place are essential to mitigate their impacts.
The word "lahar" originated from the Javanese language spoken in Indonesia. It specifically refers to a type of volcanic mudflow that is triggered by the rapid melting of snow or ice on a volcano during an eruption.
Most likely the snow would melt from the heat. The water would then mix with ash from the eruption, leading to a mudflow called a lahar.
Kelvin S. Rodolfo has written: 'Pinatubo and the politics of lahar' -- subject(s): Eruption, 1991, Lahars
A Quiet eruption is one in which no rock or material is erupted from the crater , A violent is one where huge load explosion/ eruption throwing Rocks/ Scoria /Steam /Ash from the vent.May be Lahar as well
Neither. It is a volcano that famously erupted in 2010. The eruption produced pyroclastic flows.