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Earth, Planets and Space
Fig. 7. | Earth, Planets and Space

Fig. 7.

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

Fig. 7.

Representative results of the calculation of ballistic trajectories using Eject! (Mastin, 2008). (a) Relationship between distance (D) and impact angle (θ f ) of ballistic ejecta (m = 1.2 ton) for various launch conditions (initial velocity v i and ejection angles θ i = 10–70°). Solid lines indicate results for high-cubic ejecta with a density of 2400 kg/m3. Broken lines indicate ones for low-cubic ejecta with a density of 2100 kg/m3. Dots on lines indicate results for different ejection angles (10–70°). Some of them are numbered. (b) Relationship between distance (D), and impact velocity (v f ) for various launch conditions (initial velocity v i and ejection angles θ i = 10–70°) for 1.2 ton ejecta. Both figures are for a range of initial velocity, ejection angle and drag coefficients, for high and low cubic-shaped ejecta.

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