Articles | Volume 12, issue 3
Solid Earth, 12, 633–664, 2021
Solid Earth, 12, 633–664, 2021
Research article
16 Mar 2021
Research article | 16 Mar 2021

Physical and mechanical rock properties of a heterogeneous volcano: the case of Mount Unzen, Japan

Jackie E. Kendrick et al.

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Cited articles

Alatorre-Ibargüengoitia, M. A., Scheu, B., Dingwell, D. B., Delgado-Granados, H., and Taddeucci, J.: Energy consumption by magmatic fragmentation and pyroclast ejection during Vulcanian eruptions, Earth Planet. Sci. Lett., 291, 60–69,, 2010. 
Almberg, L. D., Larsen, J. F., Eichelberger, J. C., Vogel, T. A., and Patino, L. C.: Comparison of eruptive and intrusive samples from Unzen Volcano, Japan: Effects of contrasting pressure–temperature–time paths, J. Volcanol. Geoth. Res., 175, 60–70,, 2008. 
Althaus, E., Friz-Töpfer, A., Lempp, C., and Natau, O.: Effects of water on strength and failure mode of coarse-grained granites at 300 C, Rock Mech. Rock Eng., 27, 1–21,, 1994. 
Ashby, M. F. and Sammis, C. G.: The damage mechanics of brittle solids in compression, Pure Appl. Geophys., 133, 489–521,, 1990. 
ASTM: D3967-08, Standard test method for splitting tensile strength of intact rock core specimens., ASTM International, West Conshohocken, USA,, 2008. 
Short summary
The last lava dome eruption of Mount Unzen (Japan) ended in 1995, but ongoing instability means much of the area remains an exclusion zone. The rocks in the lava dome impact its stability; heterogeneity (contrasting properties) and anisotropy (orientation-specific properties) can channel fluids and localise deformation, enhancing the risk of lava dome collapse. We recommend using measured material properties to interpret geophysical signals and to model volcanic systems.