Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities and you. In this blog we’ll be discussing the pressure used to detect tsunamis.
Using Pressure to Detect Tsunamis
It has been five years since the Tsunami that devasted the Japanese coast. In 2004, Thailand experienced the impact of a tsunami as well. The tsunami is a direct effect of an earthquake somewhere in the region but the quake could be thousands of miles away. Typically, the seismic activity is initially detected by accelerometers. However, tsunami warnings also come from distributed pressure sensor measurements and a system called DART for Deep-ocean Assessment and Reporting of Tsunamis. After the seismic activity is detected, tsunami waves propagate across the ocean and each DART monitoring station measures the height and time of each wave in a bottom pressure recorder (BPR). This data is combined with other inputs to develop a tsunami forecast that can be a watch, warning or evacuation depending on the severity.
The frequency change of a Bourdon tube pressure sensing site in a DART system is measured by a quartz crystal and the data is transmitted from the bottom of the ocean to a buoy at the surface and then to a satellite and finally to a tsunami warning center.
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-Han Mai, Senior Marketing Specialist, All Sensors Corporation (email@example.com)