Table 3 Best fit model parameters to the ballistic ejecta determined through over 110 model simulations
Vent | No. of particles | Particle density (kg/m3) | Density s.d | Bearing | Drag coefficient | Initial flow velocity (m/s) | Flow range (m) |
|---|---|---|---|---|---|---|---|
Northern | 270,000 | 1691 | 311 | 110 | 0.7 | 65 | 30 |
Eastern | 124,500 | 1691 | 311 | 114 | 0.7 | 58 | 25 |
Eastern | 53,300 | 1691 | 311 | 114 | 0.7 | 50 | 20 |
Particle diameter (m) | Displacement from vent centre (m) | Initial velocity (m/s) | Ejection angle (from vertical) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Average | SD | Range | Average | SD | Max | Average | SD | Average | SD |
0.0791 | 0.042 | 0.05–0.422 | 4 | 3 | 8.138 | 65 | 5 | 60 | 10 |
0.0791 | 0.042 | 0.05–0.422 | 3 | 2 | 6 | 58 | 5 | 60 | 10 |
0.0791 | 0.042 | 0.05–0.422 | 3 | 2 | 6 | 50 | 5 | 60 | 10 |