Lava
coming down a volcano is like a
coming down at you.
The
volcanoes explode because of all the heat and pressure. Scientist
can predict volcanic eruptions by the small tremors that precede it. There
are three types of volcanoes.
First is shield. Lava just flows out of it. Second is cinder cone. It blows
lava out. Last, Composite. Composite can flow out or blow up.
Volcanoes occur mostly at plate boundaries. So don't worry, one's not going to pop up in the middle of the street, or your back yard. Plus, some volcanoes have to build up steam before the can explode. But, if you live in Hawaii, The best advice is to get out of the way of the lava. don't try to fight it with your garden hose. There is also a place called the ring of fire. It is a plate boundary with at least 30 volcanoes. It is the continental boundaries of North America, Pacific plate, and Asia.
Volcanoes are vents to the Earth. Its like a balloon that's been over filled
with air. Its got to vent some of the pressure. This also causes earthquakes.
I'm not necessarily saying that with out volcanoes earth would pop, but
it would have more earthquakes.
Scientist
notes the Tremors before Mt.
Saint Helens (above) was about to blow. They thought that it was just
letting off steam. But they were wrong. Half the mountain collapsed, and
is released ash & poison gasses that suffocated people. It had huge
destructive power. The sky was black and NO sun came through. In fact,
it is still steaming today. It, from the 1980 explosion, is still giving
off after shocks TODAY!
.The veterans living there said it was like a nuclear bomb going off. It didn't put out a ton of lava, but it put out a ton of ash, almost literally. The scary thing is that it could go off at any time again. But this his time we'll be prepared. Scientist now can detect even the slightest volcanic activity. Plus, we have newer, faster cars, so we can get away more easily.
Mt.
Vesuvius is a volatile volcano in Italy. It pictured above, had one
of the strongest eruptions in Europe's history in 3580 B.C. In a
eruption in 79 A.D. it was the first eruption recorded in detail. It every
few years has a "plinian" eruption. Plinian means it has sustained explosions
and eruptions, a tall column of smoke, and it blankets an area with an
amount of ash.
It causes many pyroclastic flows and sometimes tsunami. But luckily, what to do in case of an eruption is like a tornado drill is to us. It creates tephirte rock, that, if it cools in the air, can cause sever damage to property. It even buried a famous city now, Pompeii, in ash, preserving people in the last position they were in when they died. So, watch out in Italy, because your town could be the next Pompeii.
Do you know the hazards of volcanoes? One hazard, of course,
is the lava coming down a burning property to the ground. The next hazard
is poisonous gases. You could die of suffocation in this way. Lastly, is
the ash. It's red hot, it buries property, and can fill your lungs. In
conclusion, volcanoes can be deadly. For more information, click here.
Do you know the
causes of volcanoes? Pressure & heat. When the magma rises in
the volcano, it pushes on the walls. When the lava reaches the top, if
there's enough pressure, it will explode. This effect is what caused the
Hawaiian island. Though, all volcanoes don't explode. Some just let lava
flow out. These areas are closer to the mantle, so there's less time for
the volcano to blow. In conclusion, this is what causes the volcanoes to
blow. For more information click
<- there.
These are signs t tell if
you should run for your life from a volcano. Before volcanoes erupt. they
send out small tremors. Secondly, the smoke out of the top. Lastly, the
volcanoes might send out some ash. These are reasons to run from a volcano.
Created by: The god of death A.K.A. Me