Underwater sound waves can help to alert tsunami earlier

When events that cause tsunamis like underwater earthquakes occur, sound waves known as sound gravity waves (AGW) are sent through the water stream. Now, Cardiff University scientists have developed a method of mathematical analysis of those waves to predict how the tsunami will be devastating.

AGW waves move 10 times faster than tsunamis, and move in every direction from the center of the earthquake.

When they are detected by a hydrophone (water seismic receiver in the water), this device can determine the characteristics of the earthquake such as location, time, size and direction. By analyzing that data, Cardiff researchers can now calculate the potential tsunami amplitude and destructive power, much earlier than before.

Underwater sound waves can help to alert tsunami earlier Picture 1
Consequences of tsunami attacks Sri Lanka in 2004 (Source: Fotoember / Depositphotos)

Currently, the warning system consists of buoys to measure changes in ocean pressure caused by tsunamis. If these devices are anchored near the shore, they do not provide much advance warning - the tsunamis actually touch these buoys to be discovered. In addition, there needs to be a network of many buoys, placed around the world and quite expensive.

But an AGW wave recognition system will not have the same disadvantages.

Leading scientist Dr. Usama Kadri said: "By measuring negative gravity waves, we have everything we want. Our aim is to be able to set a tsunami alarm within minutes. after recording the audio signals from the hydrophone station ".

In a previous study, Kadri also considered the possibility of using artificial AGW waves to prevent tsunamis from causing landslides.

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