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 Earths deepest oceanic trenches.➲Only scientists and staff in meteorological live in the islands now.
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
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.
Pacific Ring of Fire(2)Brue line: sea trench
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.
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.
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