Volcanoes?????

Question

i have five questions.. can u help wiv ny of them?
1) What are the imediate effects of a volcano errupting?
2)On average how many people would die from a strato volcano erruption?
3) How do volcanoes effect homes, jobs and transport?
4) What are the long term effects?
5) What are the global effects?

ok its a skool project.. where we hav to invent our own volcano and choose lyk here it is n all that .... and i would get alot out of doing it 4 myself im sure but when u hav 2 essays, a book report, and 2 projects due in nxt week sumtimes u hav 2 compromise! n ok mayb thats a slight exxageration

ok its a skool project.. where we hav to invent our own volcano and choose lyk here it is n all that .... and i would get alot out of doing it 4 myself im sure but when u hav 2 essays, a book report, and 2 projects due in nxt week sumtimes u hav 2 compromise! n ok mayb thats a slight exxageration

Answer 1

1) firstly earthquakes prior to and during the event, a large dust cloud rising upwards to eventually form a mushrom cloud which then collapses several hours after the eruption to form pyroclastic flows, ash falls from the cloud can bury people/towns and reduce the oxygen levels as well as the main danger of collapsing roofs, lava is actually the least dangerous of all of them. You can generally run faster than a lava flow unless it's one such as in Hawaii which happen so regularly people know they're there.

2) Any number of people. It's not a question that can be answered. If the Mount St Helens eruption had erupted as planned none should have died. They are the most common volcanos in the world but it all depends on population in the area, the lay of the land and amount of warning time we manage to get,

3) During eruptions, lava, pyroclastic flows or ash could destroy homes by fire, wiping them out or simple weight forcing collapse. Obviously not manye people would be working! Transport is pretty much brought to a stand still; visinbility is low, roads are blocked from ash and lava, cars stop working after choking with ask... Before the eruption farming is a great way to make a living on a volcano. Fabulously fertile soils make for great cultivation. Rock in the area will genereally be very hard igneous stone so good and strong for building not so good for quarrying or carving into shape though! Obviously the worry of impending eruption will always be there but most locals just live life day to day and forget it's there.

4) Loss of farmland which needs to be re cultivated could cause food problems, global warming as the ash blocks out the sun's rays, illnesses resulting from ash in the lungs, better farmland, new species of plants and animals. A supervolcano erupting could cause worldwide mass extinction... it all depends on the volcano

5) See above, also the increased global warming is important and ash could fall over neighbouring countries hundreds or thousands of miles away. Eruptions can be heard from the same distance sometimes, e.g. krakatoa.

Answer 2

1 - Much debris, dust, soot, rocks and smoke thrownn into the atmsphere; shaking of the local ground; lava flows (some pyroclastic) destroying whotever is on the slopes; a great deal of noise; bad smells; probable initiation of big wave.
2 - don't know.
3 - if within range of the lava flows or descending aerial debris expect destruction, disruption and damage, also possible EM interference to radios.
4 - Depends on the size and duration of the eruption. May be very little beyond the immediate disruption or it could be spectacular sunsets for a while if it's another Krakitoa.
5 - As 4, but consider that if all volcanoes were stoppered then there would be delayed super bangs at plate boundaries.

Answer 3

ok...
1) the imediate effects are, lava flows, pyroclastic flows, ash falls, volcanic bombs, explosions, lava fountains, gas release.

All of these effects dont happen at every volcano tho.

2) don't know it would really depend on how many people live close to it I suppose.

3) homes and roads etc can be destroyed by lava flows, pyroclastic flows and lahars. Fallout of volcanic ash can cause roof collapse. Volcanoes can effect jobs cos workplaces can be damaged or destroyed or routes to work may be cut off. Jobs in tourism may be effected by an eruption or predicted eruption as people could stop visiting the area. However they can be good for jobs too, they have fertile soil so are good areas for farming. If there is no sign of eruption or if eruptions are frequent and predictable they can be very attractive to tourists and therefore good for he tourist indusry.

4) long term effects of an eruption can be (but aren't always), contamination of the land by gases such as HF, death of livestock due to this. Alteration of Climate due to large amount of gas realease.

5) can effect the global climate if it is a large eruption releasing lots of volatiles and ash in to the atmosphere e.g. if Yellowstone park erupted it would effect global climate.

Answer 4

Each of these questions has no specific answer. The calculations depend fully on the enormity of the blast, the geographical location of the caldera and the inhabitance level of the surrounding area. Even in densely populated volcanic regions, eruptions can be quite harmless depending on weather conditions. Many variables, so not enough information to answer your question I'm afraid.

Answer 5

hmmm. Smells like a little school research project!

Honestly, you will get a lot more out of this if you do your own research, rather than copying down whatever you find here.

Start with a book from the library on volcanoes. Read that. Then do a web search on volcanoes.

Answer 6

i think you should get out your textbooks and work your way through these questions one at a time-

Answer 7

http://en.wikipedia.org/wiki/Volcanic_eruption

have a read here