From: Estimation of ballistic block landing energy during 2014 Mount Ontake eruption
Parameter name | Notation | Value |
---|---|---|
Particle diameter (m) | D _{p} | 0.2 |
Drag coefficient | C _{D} | 0.0–1.2 |
Particle density (kg/m^{3}) | ρ _{p} |
Mean = 2300 Std = 300 |
Particle ejection speed (m/s) | v _{e} | 100–200 |
Polar angle (°) | θ |
Mean = 0 Std = 15 |
Azimuth angle (°) | φ | Uniform distribution 0–360 |
Rotation angle from the vertical axis (°) | γ | 20–80 |
Direction angle from north to east (°) | α | 10–30 |
Gas flow effect range (m) | L _{f} | 100 |