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Underwater tsunami sensors planned by year end
Topic Started: 30 Aug 2012, 12:28 AM (26 Views)
skibboy
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Underwater tsunami sensors planned by year end

The Japan Meteorological Agency says it will set up 3 new tsunami gauges in the Pacific seabed to help speed up detection and issue warnings after huge earthquakes.

The agency says it will install 3 monitors about 300 kilometers off the coast of northeastern Japan sometime around October and start using them as early as the end of the year.

The gauges will be placed east of the Japan Trench.

The monitors are expected to detect tsunami generated by earthquakes near the trench about 10 minutes after quakes occur.

That's 10 to 20 minutes faster than conventional systems such as Global Positioning System-based wave gauges and coastal tidal-gauge stations.

The monitors will detect tsunami based on hydraulic pressure changes. The data will be sent to satellites through buoys on the sea surface.

After the March 11th earthquake last year, the meteorological agency initially underestimated the size of tsunami by a considerable margin.

The GPS wave gauges set up about 20 kilometers offshore detected the tsunami before they reached Japan's coasts.

Aug. 29, 2012

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