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Date: March 05, 2010 National Centre: Coasts; Natural Hazards; Oceans
Rob Bell's analysis of the tsunami signature. Read more about Did sea-level gauges in New Zealand detect the 2010 Chile Tsunami?
Date: October 06, 2009 National Centre: Coasts; Natural Hazards
A powerful Magnitude 8.0 earthquake ruptured the seafloor south of Samoa on 30 September 2009, unleashing a destructive tsunami on Samoa, American Samoa, and northern Tonga (Niuatoputapu). Its impact on distant New Zealand shores was picked up by a sea-level monitoring system operated by NIWA and other agencies. The system showed that peak waves arrived between 1–2 and 13 hours after the arrival of the first tsunami waves, depending on locality. Read more about What impact did the Samoa tsunami have on New Zealand?
Date: October 05, 2009 National Centre: Aquatic Biodiversity and Biosecurity; Coasts; Oceans
Ocean acidification is the name given to the lowering of pH of the oceans as a result of increasing carbon dioxide (CO2) in the atmosphere. The pH of the ocean is determined by the level of hydrogen protons (H+) in sea water. The lower the pH, the more acidic the ocean. Read more about What is ocean acidification?
Date: September 17, 2009 National Centre:
Read more about How do we map the seafloor?
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