How do scientists predict when a volcano will erupt?
969507
http://volcanoes.usgs.gov/About/What/Monitor/monitor.html\nThis USGS site will get you to more information about volcano monitoring techniques: remote sensing, gas measurements, ground deformation measurements, seismicity measurements, geophysical measurements, hydrology monitoring.\n"Volcano monitoring methods are designed to detect and measure changes in the state of a volcano caused by magma movement beneath the volcano. Rising magma typically will (1) trigger swarms of earthquakes and other types of seismic events; (2) cause swelling or subsidence of a volcano's summit or flanks; and (3) lead to the release of volcanic gases from the ground and vents. By monitoring these phenomena, scientists are sometimes able to anticipate an eruption days to weeks ahead of time and to detect remotely the occurrence of certain volcanic events like explosive eruptions and lahars ."--no copyright because government site.
1034765
It's impossible to say when an earthquake will strike, it's only possible to predict statistically when an earthquake might happen. However, this prediction will be so broad in real terms that it will have no value to anyone in terms of safety or doing anything pre-emptive.\n\n\nThe earthquake regions are however well known and follow the recognised earth's fault lines.\n\nIt will however give people some idea of the frequency or expectation of experiencing earthquakes in their own area and allow services to be put in place. The San Andreas fault is due to have another big one soon based on past patterns but the exact date cannot be predicted and I seem to remember reading that it's already late. Only when it's actually happened will it be possible to accurately predict when it was!
212359
Remote sensing is getting data (sensing) remotely. Without going into volcanoes, we can put some instruments in the mountain and get the information. This is called remote sensing.\n\nAlso having instruments in oceans, will help in predicting Tsunamis.
226999
Here ya go : \nhttp://volcano.und.nodak.edu/vwdocs/volc_images/img_fuji.html
755153
start from here:http://en.wikipedia.org/wiki/Volcano\nthan click here:\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBUXpXNyoA;_ylu=X3oDMTE2ZGhvZmh2BGNvbG8DZQRsA1dTMQRwb3MDMQRzZWMDc3IEdnRpZANERlg1XzMw/SIG=19tfhms70/EXP=1163277749/**http%3a//rdre1.yahoo.com/click%3fu=http%3a//www.volcanolive.com/%26y=04D6D45EA8332C5A9E%26i=680%26c=21908%26q=02%255ESSHPM%255BL7sviz%253Fips%257C%7eqpzl6%26e=utf-8%26r=0%26d=wow%7eDFX5-en-us%26n=0IHKK1KQNHA4BU6E%26s=12%26t=%26m=4554E436%26o=01C888B21CE6710E36%26x=052DFE91D28B9E0A83349375261B2BB2A1\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBXHpXNyoA;_ylu=X3oDMTE2aXBvZDkwBGNvbG8DZQRsA1dTMQRwb3MDMwRzZWMDc3IEdnRpZANERlg1XzMw/SIG=12fj2lehe/EXP=1163277749/**http%3a//www.geo.mtu.edu/volcanoes/west.indies/soufriere/govt\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBaXpXNyoA;_ylu=X3oDMTE2bTQybGs2BGNvbG8DZQRsA1dTMQRwb3MDNQRzZWMDc3IEdnRpZANERlg1XzMw/SIG=13154364e/EXP=1163277749/**http%3a//interactive2.usgs.gov/learningweb/explorer/topic_hazards_volcanoes.asp\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBV3pXNyoA;_ylu=X3oDMTE2MWFla2V2BGNvbG8DZQRsA1dTMQRwb3MDMgRzZWMDc3IEdnRpZANERlg1XzMw/SIG=1aaavi8gn/EXP=1163277749/**http%3a//rdre1.yahoo.com/click%3fu=http%3a//www.volcanolive.com/contents.html%26y=04BF5322B24FA45313%26i=680%26c=15685%26q=02%255ESSHPM%255BL7sviz%253Fips%257C%7eqpzl6%26e=utf-8%26r=1%26d=wow%7eDFX5-en-us%26n=0IHKK1KQNHA4BU6E%26s=12%26t=%26m=4554E436%26o=018610364A2BA0082E%26x=05679277237FEB7DFC07236F0AED3006C9
650322
There isn't a set time.  Magma could erupt from a volcano and cool into igneous rock and then sit their for the rest of eternity, or it could erode and be compacted into sedimentary rock in as little as a few years.  To understand the rock cycle check out wikipedia.
133523
http://www.fs.fed.us/gpnf/volcanocams/msh/images/mshvolcanocam.jpg\nits usualy a cloudy day
536076
You need to include:\n1. A world map of volcanoes. \n2. Statistics about volcanoes (average number of people died from them, how frequently they erupt and destroy things).\n3. Glossy color pictures of volcanoes.\n4. A scientific basis, such as \n.....a question "why do volcanoes occur?"\n.....specific hypotheses as explanations of natural phenomena (a short guess about why volcanoes erupt before the kid does any research, such as "I thought volcanoes erupted because it was like a big pimple. I wasn't sure, so I decided to research this topic.")\n.....research about why (check the Internet, encyclopedia or library)\n.....a conclusion "volcanoes happen because ..."\n.....and "my hypothesis was wrong. I found that volcanoes are not like pimples. They are more like open arteries, because once they erupt they keep spewing until they go dry."\n5. All the good volcano projects have videos of live volcanoes (use an LCD monitor).
13162
Actually, scientists understand a lot about tornadoes, but cannot completely predict them because they happen on such a micro-scale compared to other weather phenomenae.  Scientists can predict when conditions are favorable for tornadic activity (like when a tornado warning is issued), but can't predict excatly where one will occur until moments before hand.
945885
Volcanoes are a result of the Earth trying to lose its internal heat. If the Earth's interior was cold, there would be no volcanoes. So how does a volcano form hey.\n\nWell, deep inside Earth, between the molten iron core and the thin crust at the surface, there is the mantle, a large layer of rock that is largely solid, but flows like plastic. When, for various reasons, rock from the mantle melts, it sometimes moves to the Earth’s surface through weak spots in the crust, releasing heat, gasses, and rock, what do you get when you put all this together..... you got it,  a volcanic eruption.\n\nVolcanoes erupt because magma is less dense than the solid rocks surrounding it in the mantle of the earth. As it nears the surface, gases expand and boil out of the rock, and this force of explosion propels lava from the vent. \n\nVolcanoes can occur by themselves or in belts and chains. The location of these volcanoes splits them into three groups. Rift volcanoes, subduction volcanoes, and hot spot volcanoes. This has a lot to do with plate tectonics, or moving of the segments of the earth's lithosphere. \n\n· Rift volcanoes occur where the plates are moving away from each other. They fill the separations with lava flows, creating new sea floor and mountain ridges beneath the waves. \n\n· Subduction volcanoes form where the plates collide and slide over each other. They create ridges and peaks. The Ring of Fire is a famous chain of volcanoes that rim the Pacific Ocean. About 1,000 live subduction volcanoes occur in this ring, and in any one-year, approximately 40 will be in some state of eruption. The Ring of Fire is composed of stratovolcanoes, which normally occur in chains, and account for over 95% of the world's active volcanoes.\n\nHot spot volcanoes are the exception to the rule of volcanoes occurring along plate margins. There are constant zones of magma within the earth in some places beneath the plates. The magma pierces through the plate. As time passes and the plates move, new volcanoes appear, and the extinct volcanoes are carried away with the drift of the plates. The common forms of hot spot volcanoes are shield volcanoes, like Mauna Loa of the Hawaiian Islands.\n\nMany factors determine the location, appearance, and amount of activity of each volcano. The location and consistency of magma determine the type of explosion, which determine the type of volcano that is formed. \n\nVolcanoes are both facinating and deadly examples of natures power. They are natural wonders that should be not just appreciated, but studied aswell. \n\nSorry this is long its just I studied volcanoes at uni and just find them fascinating.
1070105
Mt. Etna's eruptions, while obscuring visibility in the area surrounding the volcano, were captured by cameras on board the Terra and SeaWiFs satellites in recent days.\n\nThe eruption opened six vents in the mountain, releasing a cloud of ash stretching southeastward over the Mediterranean Sea, though the volatile mountain's lava flows have appeared to slowed.\n\nA new fissure cracked open at a height of 2,700 yards (2,470 meters) on the eastern side of the volcano, officials told Reuters on Tuesday, weakening the main lava flow that threatened the village of Nicolosi, a community of 5,000 people. \n\nThe magma pouring out of the new fissure, one of a half-dozen that have burst open on the almost 11,000-foot (3,350-meter) mountain, was heading toward the uninhabited Valle del Bove valley. \n\n"There are very slight signals that the eruption activity is diminishing. I am cautiously optimistic,'' said Alberto Di Pace, prefect of Catania, a city at the base of the volcano. \n\nBut experts say the volcano is highly unpredictable, making it extremely difficult to tell whether the eruptions will stop soon. In the past 20 days there have been more than 2,500 tremors under the mountain, with no signs of any let-up. \n\nCatania's international airport, which was shut for a second time on Monday as thick layers of volcanic ash covered the runway, was re-opened at 6:00 a.m. on Tuesday. \n\nFor a week, Europe's most active volcano has been billowing huge clouds of smoke and black ash, and spitting rivers of lava, leading the government to declare a state of emergency. \n\nThe lava flow approaching Nicolosi has almost stopped as it pools in a shallow basin some 2.5 miles above the village. \n\nOn Sunday, the community organized a religious procession to pray that the flow be diverted or stopped. \n\nLegend has it that in 1886 the local archbishop managed to divert a wave of boiling magma descending on the village by brandishing before it a statue of Saint Anthony. \n\nThe magma has already damaged ski lifts dotting the volcano's slopes and civil protection teams were trying to save the ones left intact. \n\nMount Etna is a popular winter resort, but tourism officials say snow is unlikely to settle this winter because of the extreme heat of the lava. \n\nThe last time Etna posed a threat was in 1992 when lava streams headed toward Zafferana, a town of 7,000 people on Etna's lower slopes. The Italian military had to use controlled explosions to divert the flow.
387671
it depends when the last eruption was...if the volcano had recently erupted you might find plants starting to sprout,if it erupted a while ago, then the surrounding would be filled with vegetation and many animals.
995032
It may gas off or have some activity,but the conditions that created it will probably not happen again.No one should be ramping up fear of the super volcanoes as there is not even a scintilla of enough earth heating to make them blow.
216932
http://en.wikipedia.org/wiki/Volcanos
581208
When there is earthquake around it.\nWhen you start seeing smoke rising.\nWhen you hear a big explosion and see black smoke.\nWhen you see lava coming down it.\n..well, that's the process anyway.
448232
Depends on the composition of the magma.\n\nMagma high in silica tends to be thick & gas bubbles are trapped. The gas builds up & boom! Explosion.\n\nBasaltic lava tends to be "soupy" so that the gas bubbles escape. No explosions here.\n\n:)
934882
Curiously, I could not find a comprehensive listing.  This site might be helpful, however, or at least give you a start.\n\nhttp://dir.yahoo.com/Science/Earth_Sciences/Geology_and_Geophysics/Volcanology/Volcanoes