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Tsunamis

Tsunami are huge waves that form in large bodies of water (e.g., oceans, seas, large lakes), that are caused by abrupt vertical displacement of a huge column of water. The displacement can be caused by naturally occurring events such as earthquakes, landslides, volcano eruptions, etc., and even sometimes from underwater explosions. These can become natural disasters devastating to the people and properties along the shore lines where they ultimately appear, sometimes in waves as big as hundreds of feet high or higher.

2,290 Questions

What would you tell people if a tsunami was heading their way?

I would advise people to seek higher ground immediately and move away from the coast to avoid being caught in the path of the tsunami. It is important to follow evacuation orders and take any necessary precautions to ensure their safety.

Where is lituya bay located?

Lituya Bay is located in Alaska, USA. It is a fjord on the coast of the southeastern part of the state, in the Fairweather Range of the Saint Elias Mountains.

Do tsunamis occur in Alaska?

Yes, tsunamis can occur in Alaska due to its location along the Pacific Ring of Fire, a region prone to tectonic activity that can trigger underwater earthquakes and landslides, resulting in tsunamis. Alaska has experienced tsunamis in the past, including the devastating 1964 Great Alaska earthquake and tsunami.

What is it when a tsunamis are only a few feet high in?

A tsunami that is only a few feet high in is typically considered a minor or small tsunami. While it may not cause widespread damage or destruction, even small tsunamis can be dangerous to coastal areas and should be taken seriously in terms of evacuation and preparedness.

How big was the tallest tsunami in eureka?

The highest tsunami in Eureka, California was recorded at around 21.3 feet on March 28, 1964. It was caused by the Great Alaska Earthquake, which triggered tsunamis along the West Coast of the United States.

When a tsunami hits a coastline it can cause great destruction and loss of?

great loss of life, destruction of infrastructure eg. Roads, many injured and made homeless, destruction of homes and buildings eg tourist resorts, sometimes whole villages can be swept away like in the Asian 2004 tsunami.

Why is it called Indian Ocean Tsunami Not Indonesian Tsunami?

The term "Indian Ocean Tsunami" is used because the tsunami affected multiple countries surrounding the Indian Ocean, not just Indonesia. The impact of the tsunami was felt in countries such as Sri Lanka, India, Thailand, and others, leading to the broader geographical reference in the name.

Can a tsunami cause the sea surface to go down?

Yes, before a tsunami hits the shore, it can cause the sea surface level to recede significantly. This is known as a drawback effect, where water is pulled away from the coast as the tsunami energy builds up. Once the tsunami makes landfall, the water is then quickly pushed back towards the shore with tremendous force.

Why don't transform plate movements cause a tsunami?

Transform plate boundaries involve horizontal movement of tectonic plates sliding past each other. This type of movement doesn't usually displace large amounts of water vertically, which is necessary to generate a tsunami. Tsunamis are more commonly produced by subduction zones where one plate is being forced beneath another.

What is the difference between seismograph and tsunami?

A seismograph is an instrument used to measure seismic waves in the earth's crust. In other words a seismograph detects earthquakes. A tsunami occurs when there is an earthquake at sea. The earthquake causes colossal tidal waves to form and the waves crash onto shore. This is a tsunami.

Can you detect a tsunami in open ocean?

Yes, tsunamis can be detected in the open ocean using buoys equipped with sensors that measure changes in water pressure. These buoys can transmit data to alert systems onshore, which can then issue warnings to coastal communities.

How do hurricanes cause tsunamis and fires?

Hurricanes do not directly cause tsunamis. Tsunamis are typically triggered by underwater earthquakes, volcanic eruptions, or landslides. Regarding fires, hurricanes can disrupt power lines, leading to sparks that can ignite fires. Strong winds can also spread fires by carrying burning debris.

When has a tsunami caused the most damage in US History?

The most destructive tsunami in United States history was in 1964 when a magnitude 9.2 earthquake in Alaska triggered a tsunami along the West Coast. It caused significant damage in Alaska, Oregon, and California, resulting in loss of life and widespread destruction.

Can a tsunami happen again in japan?

Yes, Japan is prone to tsunamis due to its location on the Pacific Ring of Fire, where tectonic plates meet. Efforts are made to improve warning systems and preparedness in the event of future tsunamis.

When Do you know there is a tsunami?

The best indicator that a tsunami is imminent is when the ocean recedes farther than it would at low tide. The tsunami then comes in a few minutes later, usually appearing as a surge of water. The leading edge may look like a wave, but there is much more water than in an ordinary wave.

How many tsunamis happen in the Pacific Ocean each year?

On average, the Pacific Ocean experiences around 10-15 tsunamis per year. However, the frequency and intensity of tsunamis can vary widely from year to year depending on geological and oceanographic factors.

What is an estuary tidal wave called?

seiche - a french word meaning to sway back and forth This happened back in 1954, about two years after I was born, while my uncle and his family lived in Chicago (although they were far, far from the lake and well out of harm's way). http://ezinearticles.com/?The-Day-a-Tidal-Wave-Hit-Chicago&id=172583 shows an article written by someone who was there when it occurred.

What are some of the ways that loss of life occurs when humans move into an area?

Loss of life can occur due to habitat destruction, leading to displacement and vulnerability of wildlife species. Human-wildlife conflicts, such as vehicle collisions and predation on domestic animals, can also result in loss of life. Additionally, introduction of pathogens and diseases by humans can impact wildlife populations.

How many people died in the tsunami that happen in japan 2004?

According to the U.S. Geological Survey, a total of 227,898 people died.

How does wind speed affect tsunamis?

Wind speed itself does not directly affect tsunamis. Tsunamis are usually caused by underwater seismic activity, such as earthquakes or volcanic eruptions, which generate large waves that can travel across the ocean. However, strong winds can potentially impact the propagation of tsunamis by influencing wave height or speed in coastal areas.

How does wind affect tsunamis?

Wind typically does not directly cause tsunamis, as they are mainly generated by undersea earthquakes, volcanic eruptions, or underwater landslides. However, strong winds can alter the surface of the ocean, influencing the propagation and behavior of tsunami waves as they travel across the water. Wind can cause some distortion in the tsunami wave, but it is usually minor compared to the influence of the initial source of the tsunami.

Why do these changes occur when a tsunami wave is approaching the shore?

When a tsunami wave approaches the shore, two main changes occur: the water level rapidly decreases offshore as the wave pulls water toward it (causing the ebb phase) and then rapidly rises as the wave reaches the shore (causing the flow phase). This phenomenon is due to the displacement of water by the tsunami wave as it travels towards shallower waters.

When was tsunami warning system first used?

The first tsunami warning system was established in the Pacific Ocean in 1948, following the destructive tsunami that occurred in the region in 1946. The system was put in place to help detect and warn about potential tsunamis to minimize their impact on coastal communities.

Why was Thailand tsunami worse than japan tsunami?

The 2004 tsunami in Thailand was particularly devastating due to its proximity to the earthquake epicenter, which resulted in powerful waves hitting the coastal areas with little warning. In contrast, Japan's 2011 tsunami was caused by a massive undersea earthquake that hit farther offshore, giving residents more time to prepare and evacuate. Additionally, Japan has stronger infrastructure and early warning systems in place compared to Thailand, which helped mitigate the impact of the disaster.