It depends on how far from the coast did the movement of the seafloor occurred. Tsunami waves can travel up to 800 km/hr (the speed of jets!) in deep waters and become slower at shallow depths. If you lived in Chile and an earthquake produces a tsunami just offshore, then the tsunami could reach the coast of Chile in just 15 to 30 minutes. However, tsunami waves from the same earthquake will take about 15 hours to reach Hawaii further out in the Pacific ocean.
It really depends on where the earthquake or event to trigger the tsunami has occurred and where it is heading as Daniel pointed out. Anywhere from 10s of minutes if near the coast of a continent and up to 24 hours.
As Daniel correctly answered, tsunami can be really – really! – fast (800 km/h is a good guess for open ocean condition), their velocity goes like the square root of the depth in which they are travelling, and thus you would need to know where the tsunami is generated and where is the closest coast to be able to predict the arrival time.
They are very dangerous, as you probably already know, that is why there are many oceanographic research centres that also operate as “tsunami early warning” centres. In these institutes there is people working 24/7 constantly cross checking earthquakes and satellite information (from which they can estimate the sea level), to be able to detect as soon as possible the generation of a tsunami and give the information to the authorities, in order to start the evacuation of the cities and villages on the coast.
This depends on the location. As rightly mentioned by Daniel, tsunami waves can travel with speeds of up to 800km/hr. Just to give you some perspective as to the speed of a tsunami, the speed of a normal ocean wave is around 90km/hr.
As the others have mentioned, it really does depend on the magnitude of the earthquake which occurs, how far down inside the earth it happens, the type of fault on which the earthquake occurs (so whether rocks were sliding past each other or did one rock get pushed up/down) and how far away the coast is from the location of the earthquake.
Its always good to know about tsunamis and how they work – in the 2004 Indonesian earthquake, a 10 year old schoolgirl noticed that the ocean was receding, which is a clear indicator of a tsunami. She was taught this in a school geography lesson, and in applying her knowledge she saved 100 tourists from immediate danger
It depends on how far from the coast did the movement of the seafloor occurred. Tsunami waves can travel up to 800 km/hr (the speed of jets!) in deep waters and become slower at shallow depths. If you lived in Chile and an earthquake produces a tsunami just offshore, then the tsunami could reach the coast of Chile in just 15 to 30 minutes. However, tsunami waves from the same earthquake will take about 15 hours to reach Hawaii further out in the Pacific ocean.
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It really depends on where the earthquake or event to trigger the tsunami has occurred and where it is heading as Daniel pointed out. Anywhere from 10s of minutes if near the coast of a continent and up to 24 hours.
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As Daniel correctly answered, tsunami can be really – really! – fast (800 km/h is a good guess for open ocean condition), their velocity goes like the square root of the depth in which they are travelling, and thus you would need to know where the tsunami is generated and where is the closest coast to be able to predict the arrival time.
They are very dangerous, as you probably already know, that is why there are many oceanographic research centres that also operate as “tsunami early warning” centres. In these institutes there is people working 24/7 constantly cross checking earthquakes and satellite information (from which they can estimate the sea level), to be able to detect as soon as possible the generation of a tsunami and give the information to the authorities, in order to start the evacuation of the cities and villages on the coast.
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This depends on the location. As rightly mentioned by Daniel, tsunami waves can travel with speeds of up to 800km/hr. Just to give you some perspective as to the speed of a tsunami, the speed of a normal ocean wave is around 90km/hr.
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As the others have mentioned, it really does depend on the magnitude of the earthquake which occurs, how far down inside the earth it happens, the type of fault on which the earthquake occurs (so whether rocks were sliding past each other or did one rock get pushed up/down) and how far away the coast is from the location of the earthquake.
Its always good to know about tsunamis and how they work – in the 2004 Indonesian earthquake, a 10 year old schoolgirl noticed that the ocean was receding, which is a clear indicator of a tsunami. She was taught this in a school geography lesson, and in applying her knowledge she saved 100 tourists from immediate danger
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