how do scientists know when there is an erupting volcano?

Question

Please help me to answer this question as fast as we can...if i'm not mistaking scientists had a device to know that a volcano is erupting...am I correct?thanks!for answering...

Answer 1

It probably erupts just about a minute before Mrs. Volcano wanted him to. ;-))

Answer 2

It is hard to predict on when a volcano erupts. But there are devices which they use to know the probability of a volcano erupting. They have a seismograph to see how often there are earthquakes in that area. Earthquake is one of the area they are trying to see, the more earthquakes, the probable of an eruption. They also check the acidity of the sorrounding water and its temperature. Aside from that, they have devices to look at the magma in its chamber, the liquidity of it and the speed it rises from underground. There are so many factors to consider including death of trees near the volcano and some even believe that animals can predict one. You better watch the movie Dante's Peak.

Answer 3

One of the major signs that a volcano is about to erupt is de-gassing will occur. This means that there will be elevated levels of gas (i.e, methane, sulphur, etc...) coming out of any and all openings. Scientists can not accurately predict all eruptions it also depends on what type of volcano it is (Strato, Cinder, Caldera, etc...). Another sign can be small or large seismic activity or earthquakes.

Answer 4

Some volcanologists are using satellites to monitor active volcanoes. Other scientists are looking at the gases emitted from volcanoes. Carbon dioxide (CO2) is one of the gases to first leaves a magma as it creeps up into the Earth's upper crust. Geographical Positioning Systems satellites (GPS) are also used to continuously monitor deformation at volcanoes

Answer 5

To learn factual information about volcanoes consult www.usgs.gov. --- The official site of the United States Geological Survey.

Skip Dante's Peak, its another Hollywood disaster movie that we geologists laugh at because of its limited and mis-represented truth.

Instruments used to detect active magma movement within the chamber does involve a seismometer. Laser guided seismometers can detect meter sometimes even centimeter scale deformation.

Answer 6

Yeah, the lava burning their feet, that's a good clue.

Also being blown a mile into the sky might tip them off.

There is no 'device' to predict volcanic eruptions. They use gas build up, seismic readings, water readings, temperature readings, historical data, and combine it all into a very educated guess.

Answer 7

Remote sensing is the detection by a satellite’s sensors of electromagnetic energy that is absorbed, reflected, radiated or scattered from the surface of a volcano or from its erupted material in an eruption cloud.

Answer 8

They're pretty hard to miss;
earth tremors, venting gases,
ejected solids & lavas.
The device you refer to is probably the
'seismograph' that records the earth tremors,
sometimes at great distances.