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Before a Volcano "erupts" the mountain and surrounding areas will experience seismic activity (Earthquakes) for hours, days, weeks and even months before the initial eruption. Also Vulcanologist monitor gas emissions from the volcano to see if there is a build up gas. And of course there many be some steam/smoke coming from the volcano (Does not have to be from the cone of the volcano, can be from vents on the side or further down the volcano!) In the case of Mt St Helens - A "DOME" appeared on the side of the mountain, this was a build up of Magma further down the mountain slope in which grew larger by the day until the initial and catastrophic eruption.
What else can I help you with?
Why will the Yellowstone vocano erupt in your lifetime?
There is no reason to believe Yellowstone will erupt any time in the next century.
What do scientists look for to try and dicide if a vocano is going to erupt?
because smoke comes out of the volcano
How often can a vocano erupt?
As often as it wants. It all depends on how much pressure is building up underneath it.
Where did the first vocano erupt?
A tree fell down and touched the volcano so the volcano started erupting.
How can you tell if a valcanoes going to erupt?
how can you tell if a volcano going to erupt
What is the difforents from a vocano and a mountain?
the difference from a volcano to a mountain is that a vocano erups but a mountain doesnt.
What vocano was the first to erupt?
Volcanoes have been erupting continuously, somewhere, since the very beginning of our Earth, millions of years before mankind appeared on the surface. Therefore, this question is unanswerable.
How do you tell if a volcano is about to erupt without any shaking?
PLEASE TELL ME!!!
How can you tell if a volcanoes dormant?
It doesn't erupt
When has the vocano eruped in he past?
tomorrow
What sign did the volcano give before it erupts?
they give warnings to tell them that its about to erupt
Where is the chamber by HQ in moshi monsters?
by the vocano
