The Kermadec Islands are located in the South Pacific Ocean around 800-1000 km northeast of New Zealand. The islands sit above the deep Kermadec Trench, one of the deepest oceanic trenches on Earth. As the Kermadec Islands fall along the Pacific Ring of Fire, a zone of volcanic activity around the Pacific Ocean basin, they frequently experience earthquakes. Scientists are the primary inhabitants of the otherwise unpopulated islands.

1. Kermadec Islands
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2. Kermadec Islands
➲There are Kermadec Islands in the South Pacific Ocean
800–1,000 km northeast of New Zealand.
➲The Kermadec trench is in east of Kermadec Islands. It is
one of Earth's deepest oceanic trenches.
➲Only scientists and staff in meteorological live in the
islands now.

3. Magnitude
➲ Magnitude is character of earthquake which Charles Francis
Richter devised.
➲ It refers to a number of ways to assign a single number to
quantify the energy contained in an earthquake.
➲ log10 E = 4.8 + 1.5 M E: Energy of earthquakes
M: Magnitude

4. Pacific Ring of Fire(1)
➲ There is Kermadec Islands on Pacific Ring of Fire, so
earthquakes frequently occurs in the islands and
surrounding.
➲Pacific Ring of Fire is that Volcanic zone surrounding around
the Pacific.
➲Japan also is on Pacific Ring of Fire.
➲There is orogenic belt other than Pacific Ring of Fire.
It is Alpide belt, but volcanic activity don`t occur as Pacific
Ring of Fire.

5. Pacific Ring of Fire(2)
Brue line: sea trench

6. Oceanic trench
➲The oceanic trenches are hemispheric-scale long but narrow
opographic depressions of the sea floor.
➲Trenches are one of the most important natural boundaries
the Earth’s solid surface
➲Basically, oceanic trenches are on orogenic belt.
➲Accoding to Plate tectonics, oceanic treanch is subduction
zone.
➲Subduction Zone is place which plates slam into one another.

7. Earthquake in Kermadec Islands
and the surrounding
➲July 7, earthquake measuring 7.6 on the Richter scale
attacted the Kermadec Islands.
➲The U.S. Pacific Tsunami Warning Center issued tsunami
warning for the Kermadec Islands, New Zealand and the
Pacific islands.
➲Big tsunami did not occurs.
➲There was little damage by tsunami and earthquakes.

8. Summary
➲Kermadec Islands is on Kermadec trench and the surrounding
are.
➲Kermadec Islands are on Pacific Ring of Fire.
➲Pacific Ring of Fire is that Volcanic zone surrounding around
the Pacific.
➲Earthquakes frequently occur on Pacific Ring of Fire.
➲Japan also is on Pacific Ring of Fire