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

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 pro...

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Bibliographic Details
Published in:Journal of geophysical research. Solid earth 2014-01, Vol.119 (1), p.699-710
Main Authors: Nishiyama, R., Tanaka, Y., Okubo, S., Oshima, H., Tanaka, H. K. M., Maekawa, T.
Format: Article
Language:English
Subjects:
3-D density structure
Density
Domes
Geophysics
Gravitation
gravity
Lava
lava dome
Lava domes
muon radiography
Muons
Radiography
Structural analysis
Three dimensional
Usu
Volcanoes
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Summary: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. Key Points Gravity 3‐D inversion is improved by using muon radiography data A spatial resolution better than 200 m is achieved
ISSN:2169-9313
2169-9356
DOI:10.1002/2013JB010234