Table 3 Input parameters for Eject!
From: Phreatic eruptions at crater lakes: occurrence statistics and probabilistic hazard forecast
| Parameter | Value | Comment |
|---|---|---|
| Ejection angle | 17-90° | Sampling a truncated von Mises-Fisher distribution, depending on vent location |
| Initial velocity - Scale 2 | 70-80 m/s | Sampling a uniform distribution |
| Initial velocity - Scale 3 | 80-100 m/s | Sampling a uniform distribution |
| Initial velocity - Scale 4 | 100-140 m/s | Sampling a uniform distribution |
| Block diameter | 0.2, 1, 2 m | Weighed using a power law distribution |
| Block shape | "high cube" | Ballistics are mostly angular (Kilgour et al. 2010) |
| Block density | 2400 kg/m3 | Average block density after Kilgour et al. (2010) |
| Tailwind velocity | 0 m/s | |
| Radius of reduced drag zone | 100 m | |
| Temperature at sea level | 14 °C | Yearly average in New Plymouth (NIWA 2014) |
| Thermal lapse rate | 6.5 °C/km | Standard atmospheric conditions (ICAO 1993) |
| Elevation | 2380 m | |
| Vertical distance landing - take off | used the Eject! procedure to calculate trajectory down to -1000m, then compared with real topography to obtain landing point | |