Physical and mechanical rock properties of a heterogeneous volcano: the case of Mount Unzen, Japan - Kendrick, J. E.; Schaefer, L. N.; Schauroth, J.; Bell, A. F.; Lamb, O. D.; Lamur, A.; Miwa, T.; Coats, R.; Lavallée, Y.; Kennedy, B. M. (Solid Earth, 2021)