A regime of persistent lahar activity results when eruptive activity continually supplies unconsolidated volcanic material for remobilization.
A very rapid type of downslope mass movement that involving mudflows from volcanic ash
An Indonesian word used for the mudflows that frequently occur near volcanoes They are made up of large amounts of water, volcanic ash, and soil They can travel at speeds over 60 miles per hour with travel distances of up to 100 miles from the volcanic vent
A flow of pyroclastic material mixed with water A lahar is often produced when a snow-capped volcano erupts and hot pyroclastics melt a large amount of snow or ice
A mudflow composed chiefly of pyroclastic material on the flanks of a volcano Lahars are also referred to as volcanic mudflows or debris flows They form in a variety of ways, chiefly by the rapid melting of snow and ice by pyroclastic flows, intense rainfall on loose volcanic rock deposits, breakout of a lake dammed by volcanic deposits, and as a consequence of debris avalanches
A type of mudflow that originates on the slopes of volcanoes when volcanic ash and debris becomes saturated with water and flows rapidly downslope
A torrential flow of water-saturated volcanic debris down the slope of a volcano in response to gravity A type of mudflow Also known as a "glowing avalanche "
A flowing mixture of water and rock debris that forms on the slopes of a volcano, sometimes referred to as debris flow or mudflow The term comes from Indonesia