What are positive effects of volcanoes?
Volcanoes have done wonderful things for the Earth. They helped cool off the earth removing heat from its interior. Volcanic emissions have produced the atmosphere and the water of the oceans. Volcanoes make islands and add to the continents.
What are the advantage and disadvantage of volcanoes?
When a volcano erupts it throws out a lot of ash. At short notice this ash can be very harmful to the environment, but on the long term the ash layer, which contains many useful minerals, will be converted to a very fertile soil.
What are the advantages of living near a volcano?
Volcanoes can provide people with many benefits such as: volcanic rock and ash provide fertile land which results in a higher crop yield for farmers. tourists are attracted to the volcano, which increases money to the local economy. geothermal energy can be harnessed, which provides cheaper electricity for locals.
What are 5 causes of earthquakes?
Things that cause earthquakes
- Groundwater extraction – decrease in pore pressure.
- Groundwater – increase in pore pressure.
- Heavy rain.
- Pore fluid flow.
- High CO2 pressure.
- Building dams.
- Earthquakes.
- No earthquakes (Seismic quiescence)
What are the causes and effects of earthquakes?
Earthquakes are caused due to sudden lateral or vertical movements in the crust of the Earth. Or we can say that when tectonic plates ride over the other and cause the collision of orogeny or mountain building. The largest faults are formed on the surface of the Earth due to boundaries between moving plates.
Which month has the most earthquakes?
March
What are the 2 types of earthquake?
There are two types of earthquakes: tectonic and volcanic earthquakes.
What is the 3 types of earthquake?
Three Kinds of Earthquakes
- Shallow fault earthquakes. A fault is a break in the rock beneath our feet.
- Subduction zone earthquakes. The largest earthquakes ever recorded are subduction zone earthquakes.
- Deep earthquakes. Deep earthquakes occur in the subducting ocean slab, deep beneath the continental crust.
What is a normal fault in science?
normal fault – a dip-slip fault in which the block above the fault has moved downward relative to the block below. This type of faulting occurs in response to extension and is often observed in the Western United States Basin and Range Province and along oceanic ridge systems.
What is the effect of normal fault?
The hanging wall is to the left of the fault and the footwall to the right. This sliding downward of normal faults creates rifts, valleys, and mountains.
Where does a normal fault occur?
Normal faults are often found along divergent plate boundaries, such as under the ocean where new crust is forming. Long, deep valleys can also be the result of normal faulting.
What is a normal fault caused by?
Tensional stress, meaning rocks pulling apart from each other, creates a normal fault. With normal faults, the hanging wall and footwall are pulled apart from each other, and the hanging wall drops down relative to the footwall. Compressional stress, meaning rocks pushing into each other, creates a reverse fault.
What happens when too much pressure builds at fault?
An earthquake is caused by a sudden slip on a fault. When too much pressure builds, massive chunks of the Earth move and release intense energy. This results in waves that travel through the Earth’s outer crust to cause the shaking during an earthquake.
What are the things that affect the stress in fault lines?
The stress state along a fault affects its stability, and if it is changed, faults that were formerly inactive can be reactivated. Several factors, such as change in pore fluid pressure, may alter stress condition.
What are the 3 types of stress in geology?
Stress is the force applied to a rock and may cause deformation. The three main types of stress are typical of the three types of plate boundaries: compression at convergent boundaries, tension at divergent boundaries, and shear at transform boundaries.