Earth:Boso Triple Junction
Boso Triple JunctionBoso Triple Junction (also known as Off-Boso Triple Junction) is a triple junction off the coast of Japan; it is one of two known examples of a trench-trench-trench triple junction on the Earth (the other being the Banda Sea Triple Junction). It is the meeting point of the North American Plate (represented by the Okhotsk Plate) to the north, the Pacific Plate to the east and the Philippine Sea Plate to the south.[1]
Name origin
The Boso Triple Junction is named after the Bōsō Peninsula.
Formation
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.
Risks
The Boso triple junction is only ~400 kilometers from the Mount Fuji triple junction.
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 there[clarification needed].
References
- ↑ Renard, V. (1987). "Trench triple junction off Central Japan—preliminary results of French-Japanese 1984 Kaiko cruise, Leg 2". Earth and Planetary Science Letters 83 (1–4): 243–256. doi:10.1016/0012-821x(87)90069-0. Bibcode: 1987E&PSL..83..243R. http://www.eri.u-tokyo.ac.jp/people/seno/Papers/epsl1987.renard.pdf.
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