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There have been 4 historical recorded tsunami events between 1868 to 2013 that have affected areas around the Hauraki Gulf. Some were caused by distant large earthquakes and one by a volcano. Since 2014 up until the present day, LINZ have had sea level monitors on the east coast of Great Barrier Island and the Waitemata harbour in Auckland. 5 small tsunami and 1 larger event have been recorded during this time at Great Barrier Island.
Historical events 1868 to present
19th May 2023 M 7.7 Loyalty Islands quake triggered a 28cm tsunami registered at Great Barrier Island.
16th January 2022 Major volcanic eruption Tonga, triggered a 1.33m tsunami registered at Great Barrier Island.
5th March 2021 M 8.1 Kermadec trench quake triggered a 30cm tsunami registered at Great Barrier Island.
5th March 2021 - M 7.3 Hikurangi fault quake triggered a 10cm tsunami registered at Great Barrier Island.
11th February 2021 - M 7.7 Loyalty Islands quake triggered a 60cm tsunami registered at Great Barrier Island.
19th June 2020 - M 7.4 Kermadec trench quake triggered a 10cm tsunami registered at Great Barrier Island.
23rd May 1960 - M 9.5 Chile earthquake triggered a Pacific wide tsunami that effected the upper North Island.
28th August 1883 - Krakatau volcano 1m tsunami was seen in the Mahurangi estuary and Waitemata harbour.
11th May 1877 - M 8.3 Northern Chile quake triggered a Pacific tsunami, impacting the Coromandel peninsula.
15th August 1868 - M 9.0 Peru, Chile quake triggered a Pacific tsunami, impacting Great Barrier Island
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