Where do volcanoes normally appear and why is Hawaii different?

Answer 1

Volcanoes normally appear on the edges of the tectonic plates (the "plates" that make up the Earth's crust) because they're weaker and allow magma to come to the surface easier. Hawaii is different because it now sits in the middle of one of these plates, which is still active and constantly spewing slow moving lava.

Answer 2

hey! vlocanoes appear on the boundaries of the 7 tectonic plates. This is because when two plates move towards each other one falls underneath. The magma meltz the rock forcing it up to create a volcano! Hawaii is different beacuse there used to be two samll tectonic platesbut over time they joined uinto one forcing th land up to make 1 large volcano!!

i hope i cud help
ta

Answer 3

Volcanoes are the result of cracks in the Earth's crust. Under these cracks are liquid magma, (molten lava) which builds up under pressure until it exceeds the pressure of the Earth's crust above it. These cracks in the Earth are the tectonic plates that are part of the mountain forming geology of the planet. One side of the crack moves over the top of the other, rising up to form mountains. The magma follows these overlapped areas of the crust, seeking a way to rise to the surface of the Earth. When the magma reaches to the surface, a volcano is formed from the mountain already there.

Hawai'i is no different. The volcanoes there were formed in the same manner -- just that they were underwater. Underwater volcanoes are not uncommon.

Answer 4

Usuallythey appear at the edges of tectonic plates, where a weakness allows the pressure to get through.

The Hawaiian chain was formed over a hot spot beneath the seabed. The bed is moving, so as the activity below increases, it sometimes perforates the ocean bed and forms a new island. The islands erode too, so the oldest one, furthest away from the hot spot may be in decline. See also the Galapagos islands.

Answer 5

Volcanoes mostly occur along fault-lines.
The Hawaiian volcano occurs in the middle of a plate.
This is explained by the presence of a hot-spot which in effect punches through the earths crust. This can be seen by satellite images of the Hawaiian Island chain. The tectonic plate moves but the hot-spot doesn't.
Why don't you ask your teacher to explain the recent Australian earthquake?

Answer 6

One of the most dangerous volcanoes is in the Afar depression in Ethiopia. It is also one of the least-known volcanoes. It has been active on and off for thousands of years, but has been constantly active since 1967.

The temperature in that area is never less than 140 fahrenheit and the volcano itself is huge - it is about 50 kilometres around its rim. It is situated at the meeting of the European and Asian tectonic plates.

Answer 7

Volcanoes normally appear near the edges of tectonic plates, but Hawaii is not near the edge of one.

Answer 8

They normally appear at the junctions of tectonic plates eg. the pacific 'ring of fire.'
Hawaii is different because it is intra-plate or in the middle of a plate. This is due to the plate moving over the top of a hot-spot of magma in the mantle. If you look at the positions of the islands in Hawaii you will see the direction the plate is moving as it passes over the hot-spot.