The combined effects
of pyroclastic flows, volcanic ashes and tsunamis had disastrous results in the region.
Scientists are now watching to see whether the volcano repeats the violent eruptions of 1963, when superheated gases and volcanic material raced down the mountain in a series
of pyroclastic flows, killing more than 1000 people.
And the flows can travel at incredibly high speeds down the sides of a volcano; an estimate of the average speed
of the pyroclastic flow down the slopes of Mount Saint Helens in Washington State during its 1980 eruption (also Plinian) was around 230 kilometers per hour.
Not exact matches
One possibility is that the eruption column
of hot volcanic ash, gas and rock fragments now extending into the sky above the summit could collapse into what's called a
pyroclastic flow and race down the flanks
of the mountain.
According to Babad Lombok, records
of the island written on palm leaves in Old Javanese, Samalas erupted catastrophically before the end
of the 13th century, devastating surrounding villages — including Lombok's capital at the time, Pamatan — with ash and fast - moving sweeps
of hot rock and gas called
pyroclastic flows.
After a wave
of hot gas and ash, called a
pyroclastic flow, engulfed nearby Pompeii and killed those left in the city, more layers
of ash from the eruption buried the buildings and bodies.
«The magma that originally erupted from the supervolcano had about 1,400 ppm lithium in it,» said Benson, describing a red - hot
pyroclastic flow of pumice, ash, crystals, and rock that spread for 50 miles in all directions.
The Pompeii and circumstance
of billowing ash, earthquakes, flaming meteors, tsunami, and
pyroclastic flow (look it up) finally adds some liveliness to otherwise steady genericalness, but the poignancy - free special - effects spectacle isn't insanely intense, as it should be, instead evoking green screens and video games.
«I've skipped all other reading in favor
of this enthralling world
of loyalty, betrayal, and
pyroclastic flows.»
Volcanologists warn that the main hazards
of a large eruption are hot and fast - moving avalanches
of rocks, dust and gas that can not be outrun, known as
pyroclastic flows, as well as mudflows and ashfall.
Worst possible scenario involves
pyroclastic flows — currents
of hot gas and rock moving at 70 miles per hour
It also involved a
pyroclastic flow - a dangerous fast - moving hot cloud
of gas, ash and volcanic matter.
Most
of the recent activity has been on the north flanks, where lava and
pyroclastic flows have stripped the mountain
of vegetation.
Pyroclastic flows and material thrown from the volcano tragically killed 78 people living in the nearby communities
of Arenal and Pueblo Nuevo.
For the following 40 years, Arenal Volcano has regularly produced
pyroclastic surges sending rivers
of lava
flowing down its impressive cone - shaped sides.
The largest
of them occurred in the late 6th century, and is believed to have generated
pyroclastic flows — that
of hot gas, ash and rocks blown out
of a volcano — reaching at least 50 kilometers from Rabaul.
Dr Kamata also points out that the ash, lava
flow, and the entire picture
of violence such as
pyroclastic flow, and how the mountain body collapsed should be used for the prevention
of future disasters, using the method
of hazard maps.