Ambient seismic noise tomography reveals a hidden caldera and its relation to the Tarutung pull-apart basin at the Sumatran Fault Zone, Indonesia
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- 作者：Trond Ryberga ; ; Umar Muksina ; b ; Klaus Bauera
- 关键词：Sumatran fault ; Ambient noise ; Tomography ; S velocity structure ; Hidden caldera
- 刊名：Journal of Volcanology and Geothermal Research
- 出版年：2016
- 出版时间：15 July 2016
- 年：2016
- 卷：321
- 期：Complete
- 页码：73-84
- 全文大小：3704 K
文摘
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We derived a 3D seismic velocity model by ambient noise studies at the Sumatra fault.
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Surface wave phases were used to invert for S-wave structure at depth by tomography.
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The model shows a velocity anomaly, interpreted as a previously unknown caldera.
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It is related to numerous volcanic hot springs, potential sources of geothermal energy.
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Hidden volcanic calderas represent a good indicator for geothermal prospection.