Where do tidal waves occur?

Tidal waves are formed by the gravitational forces of the earth, sun, and moon. The gravitational forces of the sun and (to a greater extent) the moon pull on the oceans causing the oceans to swell on either side of the earth (the side closest to the moon and the side farthest from the moon).

What’s the difference between a tsunami and a tidal wave?

A tidal wave is by definition a wave caused by ocean tides, whereas a tsunami is almost always caused by an earthquake under water. Tsunami waves are also very different from normal wind-generated waves, which many of us may have observed on a local lake or at a coastal beach.

How big is a tidal wave?

Most tsunamis cause the sea to rise no more than 10 feet (3 meters). The Indian Ocean tsunami caused waves as high as 30 feet (9 meters) in some places, according to news reports. In other places witnesses described a rapid surging of the ocean. Flooding can extend inland by a thousand feet (300 meters) or more.

Can a 6.2 earthquake cause tsunami?

It won’t cause any significant tsunami at this magnitude, still considered small with respect to tsunami generation hazard.

Can an earthquake cause a volcano to erupt?

Sometimes, yes. A few large regional earthquakes (greater than magnitude 6) are considered to be related to a subsequent eruption or to some type of unrest at a nearby volcano. However, volcanoes can only be triggered into eruption by nearby tectonic earthquakes if they are already poised to erupt.

Is it safe to go to the beach after an earthquake?

Avoid staying close to the beach, as earthquakes can trigger tsunamis. If you must evacuate after an earthquake, stay safe by making your way to a shelter or a disaster recovery center.

How many minutes before a tsunami hits?

Warning criteria That warning, he says, can go out within three to five minutes of the undersea earthquake and gives an early indication of its potential to cause a tsunami which may do damage. “If the earthquake is big it could be moving quite a lot of sea floor — often along a subduction zone”, he explains.

Can you tell when a tsunami is coming?

Witnesses have reported that an approaching tsunami is sometimes preceded by a noticeable fall or rise in the water level. If you see the ocean receding unusually rapidly or far it’s a good sign that a big wave is on its way. A tsunami wave train may come as a series of surges that are five minutes to an hour apart.

Where do tidal waves occur?

How are tidal waves formed?

A tidal wave is a shallow water wave caused by the gravitational interactions between the Sun, Moon, and Earth. The rise and fall of the tides play an important role in the natural world and can have a marked effect on maritime-related activities.

What is the origin of ocean tides?

Tides are caused by the gravitational interaction between the Earth and the Moon. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Since the earth is rotating while this is happening, two tides occur each day.

How tides are formed?

Tides are very long waves that move across the oceans. They are caused by the gravitational forces exerted on the earth by the moon, and to a lesser extent, the sun. Gravity pulls the ocean towards the moon and high tide occurs. The bulge on the far side of the Earth is caused by inertia.

What are 3 drawbacks of tidal?

Cons of Tidal Power

Specific site requirements. The acquisition of tidal energy along with the amount of it being generated from the power plants has been slow due to the specific site requirements to produce electricity.
Lack of supply for the demand.
Installation costs.
Environmental risks.
Corrosion.

What are the disadvantages of tidal?

Some of the disadvantages of tidal energy are:

High tidal power plant construction costs.
Negative influence on marine life forms.
Location limits.
The variable intensity of sea waves.

Who invented OTEC?

Jacques-Arsène d’Arsonval

How much does OTEC cost?

The proposed structure has some portion above the ocean surface. The structure can be assembled in the ocean. The cost of a proposed 50 megawatt (MW, net power) OTEC plant is approximately 75 million dollars.

What are the disadvantages of ocean thermal energy?

Disadvantages of OTEC system

Capital investment is very high.
Conversion efficiency is very low about 3-4% due to small temperature difference in between the surface water and deep water.
Low efficiency of these plants coupled with high capital cost and maintenance cost makes them uneconomical for small plants.

How can we increase the efficiency of OTEC?

Yamada et al.2 reported that the system efficiency of the OTEC power cycle can be increased 1.5-fold if the temperature of the surface seawater flowing into an evaporator with a solar collector will be increased or by providing more superheat to a working fluid that evaporates in an evaporator.

Why is ammonia used in ocean thermal energy conversion?

In a closed cycle OTEC system, water flows through a large pipe and heat exchanger, which heats a liquid with a low boiling point, such as ammonia. As the boiling ammonia creates steam, it turns a turbine generator to produce electricity.

Which of the following has the lowest efficiency?

6. Which of the following has the lowest efficiency? Explanation: OTEC power generation gives less efficiency.

Why is OTEC not feasible outside tropics?

Another major factor that hinders the OTEC plant development is the limited availability of land-based sites in the tropical regions where deep-sea water is close enough to the shore to make the operation of the plant feasible.

How does OTEC work in different cycles?

How closed-cycle OTEC works. Ammonia (or another low-boiling, heat-transport fluid) flows around a closed loop at the heart of the system. The vaporized ammonia flows through a turbine, making it spin. The turbine spins a generator, converting the energy to electricity.

Why OTEC is the best alternative source of energy?

Clean Energy: OTEC has the potential of being a very clean alternative energy – unique for a firm power source capable of providing massive energy needs. The environmental risk with OTEC is very low. Offshore: OTEC production occurs offshore. Land resources are not needed other than for on-shore landing.