Integrated processing of muon radiography and gravity anomaly data toward the realization of high‐resolution 3‐D density structural analysis of volcanoes: Case study of Showa‐Shinzan lava dome, Usu, Japan
Integrated processing of muon radiography and gravity anomaly data toward the realization of high‐resolution 3‐D density structural analysis of volcanoes: Case study of Showa‐Shinzan lava dome, Usu, Japan
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DOI：
10.1002/2013jb010234
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发表时间：
2014-01
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通讯作者：
R. Nishiyama;Y. Tanaka;S. Okubo;H. Oshima;H. Tanaka;T. Maekawa
中科院分区：
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作者：
R. Nishiyama;Y. Tanaka;S. Okubo;H. Oshima;H. Tanaka;T. Maekawa
我们开发了一种μ子射线照相和重力异常数据的综合处理方法，用于确定火山的三维密度结构，具有比传统重力反演更高的空间分辨率。在本文中，我们通过使用合成数据进行数值试验来证明所提出方法的性能，并介绍了将所提出方法应用于日本北海道昭和-新山熔岩圆顶火山所获得的结果。我们获得了穹顶下通风口的详细形状，并在穹顶顶部附近发现了凝固的致密熔岩。结果证明了基于重力和介子射线照相的混合测量方法在火山表面附近几百米大小的小结构成像方面的优势。
We have developed an integrated processing method for muon radiography and gravity anomaly data for determining the 3‐D density structures of volcanoes with a higher spatial resolution than is possible by conventional gravity inversion. In the present paper, we demonstrate the performance of the proposed method by performing numerical tests using synthesized data, and we present the results obtained by applying the proposed method to a volcano, Showa‐Shinzan lava dome, Hokkaido, Japan. We obtained the detailed shape of a vent beneath the dome and detected the presence of solidified dense lava near the top of the dome. The results demonstrate the advantage of a hybrid measurement based on both gravity and muon radiography for imaging small structures with sizes of a few hundreds of meters near the surface of a volcano.