What Instrumentation Permits the "Tsunami Warning System" to Assess the Possibility

question 40

Multiple Choice

What instrumentation permits the "Tsunami Warning System" to assess the possibility of a tsunami and decide when to raise the coastal alert?

• A) GPS satellites that monitor the sea surface height to +/- 5 cm accuracy
• B) tilt meters on the island of Oahu near Ewa Beach
• C) a trip wire attached to a rubber ducky in the middle of the Pacific
• D) networked seismographs and tide gauges around the Pacific Basin all telemetred to the centre in Hawaii

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