Seismicity and stress distribution in the Copiapo, northern Chile subduction zone using combined on- and off-shore seismic observations
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- 作者：Comte ; Diana ; Haessler ; Henri ; Dorbath ; Louis ; Pardo ; Mario ; Monfret ; Tony ; Lavenu ; Alain ; Pontoise ; Bernard ; et. al.
- 关键词：Northern Chile ; Seismicity ; Subduction ; Seamounts ; Stress
- 刊名：Physics of the Earth and Planetary Interiors
- 出版年：2002
- 出版时间：September 30, 2002
- 年：2002
- 卷：132
- 期：1-3
- 页码：197-217
- 全文大小：985 K
文摘
Historic, as well as teleseismically, and locally recorded seismicity of the subduction margin of Copiapo, northern Chile is analysed. An on- and off-shore temporary network was deployed during 2 months in the region in order to obtain a detailed definition of the Wadati–Benioff zone. An average dip angle of 20° along the subduction thrust interplate contact was determined; this value is similar to that observed along the Chilean margin, suggesting that there are no variations in the dip angle of the Nazca plate for depths less than 50–60km.