How to detect tsunami? ?

Question

How to detect tsunami? ?

Answer 1

I am the one issued the warning 2 hours before Tsunami struck our coast. But my warning was not beleived by the local T.V.Stations. Please read the real story. Now we have the instrument called buoys.This will record the pressure development under the sea and send the warning signal to the ground station.

It was about 6.30 am when the telephone bell rang. It was a call from Mr. R. Murugaiyan,( Ph- [phone] )  retired executive engineer from Tamilnadu electricity board. He asked me, if my earthquake instrument sensed any warning. I said that “No, however; I will adjust the sensitivity and see”. He said that he could see cups & saucers moving on the table. Around the same time, my daughter-in-law came from the second floor and said that she felt her cot shake. I was adjusting the sensitivity of my instrument fixed in my hall. Again another phone call from Mr. Gopal (Ph [phone]) a former project engineer of M/s Enfield, India; from Annanagar. He said he was able to see water in the bubble top water filter shaking peculiarly. Most of my friends used to call me to get the clarifications on earthquakes. I replied “I am adjusting the sensitivity of my instrument, I will contact you later”.



My instrument then started sensing the waves and it raised an alarm sound. But there was no ground motion felt by us. As, there was no ground shaking I have disconnected the sounding device and I was observing the flickering of the light in the quake alarm. Since, the frequency of the earthquake (0.5 to 15 Hz) is lower than the capacity of our vision I was able to see the flickering of the bulb. Although, I have 4 early warning instruments in my house (two imported from U.S.A. and the other two were designed by me), only my latest simplified design was adjusted to sense the earthquake on that day.



The warning signal stopped at about 6.42 A.M I.S.T. So the total warning time was 12 minutes. I never heard in the history of earthquake that the signal lasted for 12 minutes. Generally, earthquake produces shakings for a few seconds to one or two minutes only. The earthquake shakings sensed by my quake alarm for 12 minutes is very high. I was upset for a few minutes. I just thought of the concept of Richter scale. If the amplitude of shaking is low and the time of sensing was for very long time it is also equal in magnitude if the amplitude is high and the shaking is for shorter time. Therefore, I came to a conclusion that the magnitude of the earthquake sensed by my instrument is very high and should be from far away distance. As my eye was operated, I was unable to move out of my house.



Mr Chandrasekar from Ambattur ( [phone] )called me over phone and asked about its effect. I explained him that the sea water may rise to a great height. I brought the Xerox copies of earthquake behaviours from USA library. In the book named “why earthquakes” written by Mr Bruce Bolt, it was clearly mentioned what should be and should not be done before, during and after earthquake. It reads like this “Stay away from beaches and waterfront areas where Tsunami could strike even long after the shaking has stopped”. That day was also full moon day. The seismic activities will be more on that day. Therefore I informed the door darshan and to Sun T.V. to broadcast the alert message at 6.45 a.m. itself. One Mr. Chellappa attended the call at Door darshan T V station. He has asked me to bring the instrument to prove my claim. I explained to him my inability to move from the house. He ignored my warning.



In Sun T.V. my call was redirected to Sun news section. I explained about my past history and I told them that I have appeared in Sun T.V. for four times and I have appeared on T.V. of other countries like Singapore and London to explain about my instrument of warning systems. But they also ignored my warning. At last the disaster took place at around 8.45 a.m. If the use of my quake alarm was properly tested and certified by the nodal agency my warning would have received its due merit.



People were unaware of the changes that took place before the earthquake that is barking of police dogs as reported by the Chennai police department; the water receded in the sea shore before the Tsunami attack at Kanniyakumari. Water in small tanks and ponds near Nagappattanam spilled out and the water became muddy. The fisher men in Malaysia got heavy catch of fishes 2 days before Tsunami attack.

Answer 2

A recording device on the ocean floor detects changes in the weight of the water above it, signaling a possible tsunami. That information gets transmitted through radio waves, first to a buoy floating on the ocean's surface, and then on to a satellite high above the earth's atmosphere.

The satellite, much like the ones used in satellite TV systems, beams the warning to stations around the region that can warn local citizens about the coming emergency through radio, television and other means.

But even with this technology, administrators of the new Indian Ocean system will still have to figure out how to warn people in very remote locations, like Bandeh Aceh, which was so devastated in December's tsunami. There, even telephones are rare.

Answer 3

After the earthquake look for a very small and fast moving (like 200 mi/h plus) wave. They have very sensitive buoys out in the ocean that do just that.

Answer 4

The right way is to detect earth-quakes that occur below the ocean's floor. The compression waves due to this pass through the earth faster than through the sea and it is possible to find them by using earth-quake detectors. These detectors are basically heavy weights, carefully arranged and supported by strong but slightly elastic wires, to rigid and deeply burried ground piles or heavy posts, Depending on the directiojn of the suspension they give different results which allow the location of earth-quake to be quickly found (as well as its size).

Should the location of the earth-quake be in the ocean (far from land) there is a possibility that the associated water wave will spread out and reach dry land. The severity of the resulting tsunamii depends on the way the coast slopes down to the full depth of the ocean and when this slope is gradual, the waves that hit the beach are magnified from those directly generated in the central ocean. (Surfers use this property of the waves to ride the highest of them.)

So a tsunami can ony be detected during the time of an ocean-quake, if and when the spread of the water disturbance is clearly visable, which sometimes comes as a surprise!    

Answer 5

you need a network of probes far off the shores which can detect earthquakes, because tsunamis are caused by under water earthquakes.

Answer 6

if we keep the beach clean and not hurt the beach so it will.............

Answer 7

since tsunamis are caused by earthquakes causing vibration (waves) in the water, you can start detecting it by detecting an earthquake.

you can set up stations to record seismic waves and locate earthquakes that originate from the middle of the ocean or the sea. gadgets can also be installed in the sea at a long distance offshore to record huge waves coming onshore.

a warning is then sent to the surrounding countries to get the people ready for evacuation.

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