When a disaster such as a tsunami or volcanic eruption happens, the Tsunado, a compact plug-in alert radio unit, sounds a loud alarm before tuning into a Civil Defence radio broadcast. It will soon be available for use in homes and offices.
The Tsunado is made by Disaster Warning Systems Limited (DIWA), who received funding and mentoring from Callaghan Innovation.
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http://www.callaghaninnovation.govt.nz/news-events/nz-technology-gives-better-warnings-disasters