What does the tsunami alarm sound like?

The Siren Tones Evacuation for a distant tsunami will generally be indicated by a siren blast and an announcement over NOAA weather radio that the local area has been put into an official TSUNAMI WARNING. The wail tone varies from a low to high warble sound.

How loud is a tsunami siren?

To do this, studies have shown that the siren must exceed the ambient noise level by 9 decibels. Anderson (2006) states the Page 17 Tsunami Warning-Sirens 17 standard rule for overcoming background noise is 10 decibels over the ambient noise level, and that normal surf and wind is approximately 70 decibels.

What is the tsunami siren?

Indoor tsunami sirens They are designed to alert those within the building which it is installed. This is different from the outdoor tsunami sirens which are designed to broadcast over a wider area of the surrounding community. The sirens are lightweight, for indoor use with a loud alerting noise.

Are tsunami loud?

Abnormal ocean activity, a wall of water, and an approaching tsunami create a loud “roaring” sound similar to that of a train or jet aircraft.

What is the deadliest tsunami ever recorded?

2004
The most devastating and deadliest tsunami was one in the Indian Ocean on Boxing Day, 2004. The tsunami was the most lethal ever to have occurred, with a death toll that reached a staggering figure of over 230,000, affecting people in 14 countries – with Indonesia hit worst, followed by Sri Lanka, India, and Thailand.

What do you do if you hear a tsunami warning siren?

Stay in your safe area and listen to the radio for information. Do not return to your home unless the official ‘All-Clear’ message has been given. A tsunami is a series of waves, and the danger may take several hours to pass. Only return to your home if it is safe to do so.

How does a tsunami warning siren work?

It is made up of a network of seismic-monitoring stations and sea-level gauges. These detect earthquakes and abnormal changes in sea level and help scientists decide whether a tsunami has been triggered by an earthquake. If so, warnings go out to many countries and regions in the Pacific.

Why do I hear a siren in my town?

In short, it means that something life-threatening is happening and you should go indoors and get more information. The specific guidelines (tornado, hail ,wind, etc.) for sounding sirens varies by jurisdiction, so check with your local community to find out the specifics if you are interested.