An earthquake with a magnitude of 7.8 occurred 161 km east of Raoul Island in the Kermadec Islands, with an epicenter 20 km deep. Tsunami warnings were issued for the Kermadec Islands, New Zealand, and Tonga. The Pacific Tsunami Warning Center monitors for tsunamis using the Deep-ocean Assessment and Reporting of Tsunamis system. Raoul Island is a volcanic island territory of New Zealand located about 1000 km northeast of New Zealand.

1. The earthquake of New
Zealand's Kermadec Islands
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2. About the earthquakes
● Magnitude was 7.8
● It was east 161 kilometers
○ Centered of Raoul Island
○ Some 920 kilometers south of Tonga
● Its epicenter was at a depth of 20 kilometers

3. About the earthquakes (2)
● Tsunamis warning
○ The Kwemadec Islands
○ New Zealand
○ The Pacific nation of Tonga
● It announced PTWC
○ PTWC - Pacfic Tsunami Warning Center

4. About PTWC
● Invested by NOAA
● Announces tasunamis warning
● It is no mistake
○ Tsunamis moved ocean take a long time
○ It has a thinking time because of this
● It used DART system

5. About DART system
● DART - Deep-ocean Assessment and
Reporting of Tsunamis
○ It is a system of PTWC
○ It tells full information about tsunamis
○ It operates continuously for two years
○ Its buoy is exchanged every year
● Tsunamis forecast and warning was very
improved for this system

6. About Kermadec Islands
● Location
○ North-northeast 1000 kilometers from New
Zealand
● Type
○ Volcanic islands
○ New Zealand territory
● The biggest island is Raoul Island

7. About Raoul Island
● There are many cliffs
● There are coral reefs around sea
● Its volcano is fertile
○ This name is Raoul mountain
○ This altitude is 516 meters

8. Conclusion
● The earthquake
○ East 161 kilometers of Raoul Island
○ Magnitude was 7.8
○ Epicenter was at a depth of 20 kilometers
● Raoul Island
○ North-northeast 1000 kilometers from New
Zealand
○ Volcanic island
○ New Zealand territory