Boso Triple Junction


Boso Triple Junction also known as Off-Boso Triple Junction is a triple junction off the coast of Japan; it is the only known example of a trench-trench-trench triple junction on the Earth It is the meeting point of the North American Plate represented by the Okhotsk subplate to the north, the Pacific Plate to the east and the Philippine Sea Plate to the south1

Contents

  • 1 Name origin
  • 2 Formation
  • 3 Risks
  • 4 References

Name originedit

The Boso Triple Junction is named after the Boso peninsula

Formationedit

It is formed from the junction of the Izu-Bonin-Mariana Arc where the Izu-Bonin Trench meets with the Japan Trench and the Sagami Trench

Risksedit

Located some 300 kilometres 190 mi from the Boso triple junction, Tokyo is subject to quakes and tsunamis generated from slips along this junction Furthermore, there is a large populated region along the coast of the main island that would also be subject to damage This junction probably has the highest associated insurance risk in the world, due to its proximity to extensive urban developmentcitation needed

The 2011 Tōhoku earthquake and tsunami were generated along the Japan trench well to the north of the junction and did not involve the other two trenches, although quakes that may have been aftershocks have been observed thereclarification needed

Referencesedit

  1. ^ Renard, V; et al 1987 "Trench triple junction off Central Japan—preliminary results of French-Japanese 1984 Kaiko cruise, Leg 2" PDF Earth and Planetary Science Letters 83: 243–256 CS1 maint: Explicit use of et al link




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