What is ring_of_fire_

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What is ring_of_fire_

  1. 1. What is the Ring of Fire? s1180212 Taisuke Kasai
  2. 2. A summary of the Ring of Fire● The Ring of Fire is an area in the Pacific Ocean where there is volcanoes, submarine ridges, and ocean deeps.● The area is also said the Pacific Ring of Fire.● Because of them, earthquakes and volcanic eruptions are apt to happen arround the area.● Japan is a place in the Ring of Fire.
  3. 3. How place is the Ring of Fire● The Ring of Fire is 40,000 km size.● The area has 452 volcanoes being over 75% of the worlds active and dormant volcanoes volcanoes.● About 90% of the worlds earthquakes and 80% of the worlds earthquakes happen in the Ring of Fire.● The area is also said the circum-Pacific seismic belt.
  4. 4. How place is the Ring of Fire from plate tectonics (1)● There are the plates movement and many collisions of plates in the Ring of Fire.● For example in the eastern section of the Ring of Fire, the Nazca Plate and the Cocos Plate are subducted beneath by the South American Plate.● Other example in the eastern section of the Ping of Fire, the Cocos Plate is also subdected by the Caribbean Plate, in Central America.
  5. 5. How place is the Ring of Fire from plate tectonics (2)● The southetrn portion of the Ring of Fire is more complex so there are collisions of the plates in the Mariana Islands, the Philippines, Bougainville, Tonga, and New Zealand.● Because of them, many earthquakes and big earthquakes have happen in the Ring of Fire.● For example, a magnitude 7 event happened in the southern portion at 1929.
  6. 6. The Ring of Fire in Unaited States● The Cascade Voicanic Arc lies in the western United States.● The Cascade Volcanic Arc includes 20 major vocanoes in over 4000 separate volcanic vents inluding stratovolcanoes, shield volcanoes, lava domes, and cinder cones.● The Cascade volcanism began about 37 milion years ago, and Cascade volcanoes are less than 2,000,000 years old.
  7. 7. The Ring of Fire in Japan● Japan has 10 percent of the worlds active volcanoes.● Some volcanoes lie in a zone of extreme crustal instability and are fomed by subduction of the Pacific Plate and the Philippine Sea Plate.● Many earthquakes have happened in Japan.● Frequency in the happening of the earthquakes in Japan is 1,500 earthquakes yearly.
  8. 8. Finally, in my feeling reading this article● The Ring of Fire is the area where volcanic eruptions and earthquakes can happen.● The area has many volcanoes, submarine ridges, and ocean deeps.● Japan in the Ring of Fire can be happened by earthquakes and has many volcano.● I understand that some Japanese earthquakes have happened along the Ring of Fire.

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