How does a DART system confirm the presence of a tsunami wave in the deep ocean?
Answer
By registering pressure changes on the seabed as a wave passes overhead
Deep-ocean Assessment and Reporting of Tsunamis (DART) systems utilize specialized pressure sensors deployed on the ocean floor. When a tsunami wave passes over these sensors, the change in water column weight is registered as a pressure variance. This information is then acoustically transmitted to a surface buoy, which relays the data via satellite. This method provides direct, real-time measurement of the tsunami, allowing centers to confirm a threat while the wave is still far out at sea, significantly increasing the accuracy of the warning process.
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