Sagami Trough
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Red line is the Sagami Trough
The Sagami Trough (相模トラフ, Sagami Torafu?) also Sagami Trench, Sagami Megathrust, or Sagami Subduction Zone is a 210-mile long trough where the Philippine Sea Plate is thrusting under the Eurasian Plate. The Sagami Trough generated the Kanto earthquakes of 1703 (Genroku), which was the greatest rupture along the trough in the last thousand years,[1] and the 1855 (Ansei) and 1923 (Great Kanto or Taisho). It stretches from the Boso Triple Junction where it meets the Japan Trench to Sagami Bay, where it meets the Nankai Trough. It runs north of the Izu Islands chain and the Izu-Bonin-Mariana Arc (IBM). The average quake the Sagami Trough releases is over 8.0 or higher[citation needed]. The Sagami Trough is a threat to Tokyo and the Kanto Region because of the proximity to a population center (with over 36 million living in Tokyo's metro area, with a total of 43 million living in the Kanto Region) and the magnitude the Sagami Trough can create.
- ^ David W. Simpson, Paul G. Richards, American Geophysical Union - 1981, Esrthquake Prediction: an international review 1981:46.
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[edit] References
- ^ David W. Simpson, Paul G. Richards, American Geophysical Union - 1981, Esrthquake Prediction: an international review 1981:46.
