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fayaazhussain
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Lava fountain is also a form of jet. When other jets produce noise, why do lava fountains not produce any noise?
fayaazhussain said:Lava fountain is also a form of jet. When other jets produce noise, why do lava fountains not produce any noise?
fayaazhussain said:By other jets i am referring to jets issued from a nozzle for ex. jet engine jets. Considerable amount of noise is produced from the exhaust of jet engines. Why do lava fountains don't create that much noise when compared to the exhaust jets of jet engines?
fayaazhussain said:The famous pompeii volcano eruption caused millions of deaths because people couldn't hear the lava fountain …
fayaazhussain said:By other jets i am referring to jets issued from a nozzle for ex. jet engine jets. Considerable amount of noise is produced from the exhaust of jet engines. Why do lava fountains don't create that much noise when compared to the exhaust jets of jet engines?
tiny-tim said:no, the deaths (less than 50,000 i think) were caused mostly because people couldn't hear or see the very fast (up to 450 mph) completely silent and invisible pyroclastic surges that asphyxiated them, see http://en.wikipedia.org/wiki/Pyroclastic_flow
they knew Vesuvius was erupting, but a lot of people didn't think there was any need to flee (although a lot of people did), since it was 5 miles away, and lava doesn't flow very fast (unlike pyroclastic surges)
Lava fountains are silent because the lava is typically too thick to allow gases to escape. The gases that are responsible for making noise in other volcanic eruptions are trapped within the lava flow itself, resulting in a lack of audible sound.
In some cases, lava fountains can make noise if the lava is thin enough to allow gases to escape. This typically occurs in more explosive volcanic eruptions, where the lava is more fluid and allows for the escape of gases that create sound.
Yes, the distance from the source of the eruption can also impact the perceived silence of lava fountains. If you are far enough away, the ambient noise from the eruption may mask the sound of the lava fountains, making them seem silent.
No, there are different types of lava fountains that can make varying levels of noise. For example, Hawaiian-style lava fountains are often quieter due to the low viscosity of the lava, while Strombolian-style lava fountains can be noisier due to the higher viscosity of the lava.
Although the lava fountains themselves may not make noise, scientists can still study them through other means, such as measuring the temperature, velocity, and composition of the lava. They can also use remote sensing techniques, such as thermal imaging and satellite imagery, to gather data on the size and behavior of the lava fountains.