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Earth, Planets and Space
Fig. 12. | Earth, Planets and Space

Fig. 12.

From: Ballistic ejecta and eruption condition of the vulcanian explosion of Shinmoedake volcano, Kyushu, Japan on 1 February, 2011

Fig. 12.

Relationship between depth which characterizes the dimension of the conical-shaped gas region (r c and r s ) and the explosion energy E calculated from Brode’s equation. (a) Results for the initial condition P0 = 50 MPa and r c /r i = 0.2. (b) Results for the initial condition P0 = 5 MPa and r c /r i = 0.02. Ejection angles θ i were set to be 20 and 40°.

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