 | This articleneeds additional citations forverification. Please helpimprove this article byadding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Boso triple junction" – news ·newspapers ·books ·scholar ·JSTOR(February 2018) (Learn how and when to remove this message) |
Boso triple junctionTheBoso triple junction (also known asoff-Boso triple junction) is atriple junction off the coast of Japan; it is one of two known examples of atrench-trench-trench triple junction on the Earth (the other being theBanda Sea triple junction). It is the meeting point of theNorth American plate (represented by theOkhotsk plate) to the north, thePacific plate to the east and thePhilippine Sea plate to the south.[1]
The Boso triple junction is named after theBōsō Peninsula.
It is formed from the junction of theIzu–Bonin–Mariana Arc where theIzu–Bonin Trench meets with theJapan Trench and theSagami Trench.
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 development.[citation needed]
The Boso triple junction is only ~400 kilometers from theMount Fuji triple junction.
The2011 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].
| Triple trench | |
|---|---|
| Triple ridge | |
| Triple fault | |
| Trench–trench–ridge | |
| Fault–fault–trench | |
| Ridge–fault–fault | |
| Ridge–trench–fault | |
| See also | |
